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sense & control data sheet rev. 1.1, 2016-06-17 tli4970-d050t5 miniature coreless magnetic current s ensor for ac and dc measurements with digital interface and fa st overcurrent detection
edition 2016-06-17 published by infineon technologies ag 81726 munich, germany ? 2016 infineon technologies ag all rights reserved. legal disclaimer the information given in this docu ment shall in no event be regarded as a guarantee of conditions or characteristics. with respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, infine on technologies hereby disclaims any and all warranties and liabilities of any kind, including witho ut limitation, warranties of non-infrin gement of intellectua l property rights of any third party. information for further information on technology, delivery terms and conditions and prices, please contact the nearest infineon technologies office ( www.infineon.com ). warnings due to technical requirements, components may contain dangerous substances. for information on the types in question, please contact the nearest infineon technologies office. infineon technologies compon ents may be used in life-su pport devices or systems only with the express written approval of infineon technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safe ty or effectiveness of that de vice or system. life support devices or systems are intended to be implanted in the hu man body or to support an d/or maintain and sustain and/or protect human life. if they fail, it is reasonable to assume that the health of the user or other persons may be endangered.
tli4970-d050t5 data sheet 3 rev. 1.1, 2016-06-17 trademarks of infineon technologies ag aurix?, c166?, canpak?, ci pos?, cipurse?, econopac k?, coolmos?, coolset?, corecontrol?, crossave?, dave?, easypim?, econobridge?, econ odual?, econopim?, eicedriver?, eupec?, fcos?, hitfet?, hybridpack?, i2rf?, isoface?, isopack?, mipaq?, modstack?, my-d?, novalithic?, optimos?, or iga?, primarion?, prim epack?, primestack?, pro-sil?, profet?, rasic?, reversave?, satric?, sieget?, sindrion?, sipmos?, smartlewis?, solid flash?, tempfe t?, thinq!?, trench stop?, tricore?. other trademarks advance design system? (ads) of agilent te chnologies, amba?, arm?, multi-ice?, keil?, primecell?, realview?, thumb?, vision? of arm limited, uk. autosar? is licensed by autosar development partnership. bluetooth? of bluetooth sig inc. cat-iq? of dect forum. colossus?, firstgps? of trimble navigation ltd. emv? of emvc o, llc (visa holdings in c.). epcos? of epcos ag. flexgo? of microsoft corp oration. flexray? is licensed by flexray consortium. hyperterminal? of hilgraeve incorporated. iec? of commission electrot echnique internationale. irda? of infrared data association corporation. iso? of international organization for standardization. matlab? of mathworks, inc. maxim? of maxim integrated products, inc. microtec?, nucleus? of mentor graphics corporation. mifare? of nx p. mipi? of mipi alliance, inc. mips? of mips technologies, inc., usa. murata? of murata manufacturing co., microwave offi ce? (mwo) of applied wave research inc., omnivision? of omnivision technologies, inc. open wave? openwave systems inc. red hat? red hat, inc. rfmd? rf micro devices, inc. sirius? of sirius sate llite radio inc. solaris? of sun microsystems, inc. spansion? of spansion llc ltd. symbian? of sy mbian software limited. taiyo yuden? of taiyo yuden co. teaklite? of ceva, inc. t ektronix? of tektroni x inc. toko? of toko kabushiki kaisha ta. unix? of x/open company limited. verilog?, palladium? of cadence design systems, inc. vlynq? of texas instruments inco rporated. vxworks?, wind river? of wind river systems, inc. zetex? of diodes zetex limited. last trademarks update 2011-02-24 revision history page or item subjects (major changes since previous revision) rev. 1.1, 2016-06-17 page 21 chapter 3.6 added. page 12 added note on default bandwidth. page 18 table 3-4 ?ocd output parameter? on page 18 updated: added row for de-glitch filter time. added note on default ocd level.
tli4970-d050t5 table of contents data sheet 4 rev. 1.1, 2016-06-17 table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 list of figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 list of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1 product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1 overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3 general information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.4 target applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.4 transfer function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.5 filter settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.6 increased temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3 specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.2 operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.3 fast over current output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.4 application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3.5 isolation characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.6 csa component acceptance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.6.1 board description for csa component acceptance test conditions . . . . . . . . . . . . . . . . . . . . . . . 21 4 interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.1 spi interface definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.1.1 logical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.1.1.1 protocol description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.1.1.2 description of the spi data frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.1.1.3 sensor current message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.1.1.4 sensor status message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.1.2 physical spi interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.2 serial inspection and configuration inte rface (sici) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.1 pg-tison-8-1 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.2 packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5.3 footprint recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5.4 pcb layout recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5.5 laser marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 table of contents
tli4970-d050t5 list of figures data sheet 5 rev. 1.1, 2016-06-17 figure 1-1 tli4970-d050t5 device in pg-tison-8-1 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 2-1 pin configuration pg-tison-8-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 figure 2-2 functional block diagram of the tli4970-d050t5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 figure 2-3 transfer function formula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 2-4 transfer function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 2-5 bode plots for different filter settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 3-1 distribution of the maxi mum total error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 3-2 application circuit for readout of multiple sensors in parallel bus mode . . . . . . . . . . . . . . . . . . . . . 19 figure 3-3 test board setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 3-4 dimension and layout of test board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 3-5 heat sink dimension (in mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 4-1 spi interface timing: readout of sensor data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 figure 5-1 pg-tison-8-1 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 figure 5-2 carrier tape of the pg-tison-8-1 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 figure 5-3 footprint recommendation for reflow soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 figure 5-4 pcb layout recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 figure 5-5 laser marking on the top side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 list of figures
tli4970-d050t5 list of tables data sheet 6 rev. 1.1, 2016-06-17 table 1-1 order information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 2-1 pin definition and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 2-2 overview about bandwidth and response time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 table 3-1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 3-2 electrical operating parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 3-3 accuracy parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 table 3-4 ocd output parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 table 3-5 typical application values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 table 3-6 isolation parameters according to iec 60747-5-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 table 3-7 isolation parameters according to ul 1577 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 table 3-8 absolute maximum ratings according to csa componen t acceptance . . . . . . . . . . . . . . . . . . . . . 21 table 3-9 test board parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 table 3-10 heat sink parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 table 4-1 interface timing parameters (5mhz spi clock speed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 table 4-2 interface electrical characteristics (5mhz spi clock sp eed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 list of tables
tli4970-d050t5 product description data sheet 7 rev. 1.1, 2016-06-17 1 product description 1.1 overview the tli4970-d050t5 is an accurate coreless magnetic cu rrent sensor. thus, the output signal is highly linear and without hysteresis. however, a differential measuremen t principle allows effective stray field suppression. due to the integrated primary conductor (current rail), th ere is no need for external calibration. additionally, a separate interface pin (ocd) provides a fast output signal in case a current exceeds a pre-set threshold. a small leadless package (qfn-like) allows for standard smd assembly. figure 1-1 tli4970-d050t5 device in pg-tison-8-1 package 1.2 features ? ac & dc measurement range up to 50 a ? accurate over temperature range and lifetime max. 2.9 % (0 h), 3.5 % (over lifetime) of indicated value ? low offset error (max. 25 ma at room temperature) ? high magnetic stray field suppression ? fast over current detection with configurable threshold ? galvanic isolation up to 2.5 kv max. rated isolation voltage (according to ul 1577) ? 16 bit digital spi output (13 bit current value) ? small 7 mm x 7 mm smd package table 1-1 order information product name product type package ordering number tli4970-d050t5 qualified according to industrial standards: for use in industrial / consumer applications pg-tison-8-1 sp001323146
tli4970-d050t5 product description data sheet 8 rev. 1.1, 2016-06-17 1.3 general information the tli4970-d050t5 is an accurate digital current sens or. the full scale measurement range is 50 a. the sensor is based on infineon's well-established and robust hall technology. the measurement principle allows galva nic isolation (functional isolation) between the primary conductor and the secondary interface side. the coreless concept without a flux concen trator allows significant miniaturiz ation. it shows no hysteresis effects and has enhanced linear ity and over current capab ility compared to existing so lutions. the differential measurement principle achieves best-in-class suppression of magnetic stray fields. the sensor is fully calibrated; no need for any additional calibration after pcb assembly is necessary. thus, the overall implementation effort and costs are significantly reduced. it is a plug-and -play solution, easy to use in industrial and consumer applications. the accuracy of the tli4970-d050t5 is comparable to closed-loop current measurement systems and even better than open-loop systems with magnetic core. but in com parison to the open- and closed-loop system the tli4970- d050t5 enables a significantly smaller footprint and less power consumption. infineon's patented stress co mpensation circuit provides outstanding long-term stability of the output signal. proprietary dynamic offset cancellation techniques g uarantee particularly low zero point error. hereby, the tli4970-d050t5 offers superior performance. the tli4970-d050t5 is based on a digital concept. t hus, signal processing, compensation and calibration is already integrated. no further external measurements for compensation are needed. the sensor is provided in a small 7 mm x 7 mm smd package. 1.4 target applications the tli4970-d050t5 is suitable for ac as well as dc current measurement applications: ? current monitoring ? chargers ? photovoltaic & general purpose inverters ? power supplies (smps) ? electrical drive ?etc. with its implemented magnetic interference suppression, it is extremely robust when exposed to external magnetic fields. it is also suitable for fast over current detection with a configurable th reshold level. this allows the control unit to switch off and protect the affected system fr om damage, independently of the main measurement path.
tli4970-d050t5 functional description data sheet 9 rev. 1.1, 2016-06-17 2 functional description 2.1 pin configuration figure 2-1 pin configuration pg-tison-8-1 table 2-1 pin definition and function pin no. symbol function 1 gnd ground 2 vdd supply voltage 3 dout spi data out 4 sclk serial clock input 5cs chip select input (low-active) 6 ocd over current detection output (open drain output) 7 ip+ positive current terminal pin (current-in) 8 ip- negative current terminal pin (current-out) 1 2 3 4 5 6 7 8
tli4970-d050t5 functional description data sheet 10 rev. 1.1, 2016-06-17 2.2 block diagram figure 2-2 functional block diagram of the tli4970-d050t5 2.3 functional description the current, flowing through the current rail on the primary side, induces a magnetic field. this is measured by two differential hall probes. the signal from the two hall probes is directly digitalized by a sigma-delta-a/d converter (adc). after the programmable digital lo w-pass filter, the raw current signal is fed into the dsp. the differential measurement principle of the magnetic field provides a very good suppression of any ambient magnetic stray fields. the temperature (t) and the mechanical stress (s) of th e chip are measured and converted independently of the primary current by a second adc. the digital signal proc essing unit (dsp) uses both temperature and stress information to compensate the raw current signal according to internally stored calibra tion tables. the interface unit (if) transmits the fully compensated value via the spi interface. furthermore several parameters like lo w pass filter settings or over cu rrent detection (ocd) levels can be programmed via a s erial i nspection and c onfiguration i nterface (sici) which are described in the tli4970 programming guide. for fast over current detection, the raw analog signal fr om the hall probes is fed into a programmable comparator. this comparator has a programmable glitch filter to suppr ess fast switching transients in the signal and to avoid false triggers. the open-drain output of the ocd-pin allo ws readout of over current signals for several tli4970- d050t5 sensors by only one microcontroller input pin.
tli4970-d050t5 functional description data sheet 11 rev. 1.1, 2016-06-17 2.4 transfer function the transfer function is given by the formula shown in figure 2-3 . figure 2-3 transfer function formula the basic point are defined by the value 0 d (-51.200a) and 8191 d (51.1875a). outside this current range, the sensor status message will be sent inst ead of the sensor current message (see figure 2-4 ). figure 2-4 transfer function ] [ 80 ] [ 4096 ] [ ] [ a lsb d d out d lsb lsb out a i ? = ] [ 4096 ] [ 80 ] [ ] [ d a lsb d lsb a i lsb out d + ? = current [a] 0 10 20 30 40 50 -10 -20 -30 -40 -50 output [lsb b ] output [lsb b ] x i pn 1 1111 1111 1111 8191 7168 6144 5120 4096 3072 2048 1024 0 0 0.51.01.52.0 -1.5 -1.0 -0.5 -2.0 1 1100 0000 0000 1 1000 0000 0000 1 0100 0000 0000 1 0000 0000 0000 0 1100 0000 0000 0 1000 0000 0000 0 0100 0000 0000 0 0000 0000 0000 sensor status message sensor current message
tli4970-d050t5 functional description data sheet 12 rev. 1.1, 2016-06-17 2.5 filter settings the transfer function of the tli4970-d050t5 can be influenc ed by different filter setting s. finally the combination of a high-pass filter, a prediction filter and a low- pass filter determines the overall transfer function. figure 2-5 shows the bode plots for diff erent filter settings. the filter settings can be ch anged by eeprom programming. the manual for eeprom prog ramming can be found in the tli4970 progr amming guide (a pplication note). table 2-2 gives an overview about the different filter settings. note: tli4970-d050t5 default factory setting is 18 khz. table 2-2 overview about bandwidth and response time high-pass filter prediction filter low-pass filter bandwidth response time 1) 1) 90% of final value based on 50 a step function 1 1 7 70 hz 6.2 ms 1 1 6 130 hz 3.1 ms 1 1 5 260 hz 1.6 ms 1 1 4 530 hz 781 s 1 1 3 1.1 khz 394 s 1 1 2 2.4 khz 201 s 1 1 1 5.2 khz 109 s 1 1 0 6.9 khz 92 s 0 0 0 10 khz 70 s 0 1 0 18 khz 57 s
tli4970-d050t5 functional description data sheet 13 rev. 1.1, 2016-06-17 figure 2-5 bode plots for different filter settings -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 1 (00 h [11] = 1 b ) pr = 1 (00 h [10] = 1 b ) lp = 7 (00 h [9:7] = 111 b ) -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 1 (00 h [11] = 1 b ) pr = 1 (00 h [10] = 1 b ) lp = 6 (00 h [9:7] = 110 b ) -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 1 (00 h [11] = 1 b ) pr = 1 (00 h [10] = 1 b ) lp = 5 (00 h [9:7] = 101 b ) -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 1 (00 h [11] = 1 b ) pr = 1 (00 h [10] = 1 b ) lp = 4 (00 h [9:7] = 100 b ) -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 1 (00 h [11] = 1 b ) pr = 1 (00 h [10] = 1 b ) lp = 3 (00 h [9:7] = 011 b ) -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 1 (00 h [11] = 1 b ) pr = 1 (00 h [10] = 1 b ) lp = 2 (00 h [9:7] = 010 b ) -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 1 (00 h [11] = 1 b ) pr = 1 (00 h [10] = 1 b ) lp = 1 (00 h [9:7] = 001 b ) -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 1 (00 h [11] = 1 b ) pr = 1 (00 h [10] = 1 b ) lp = 0 (00 h [9:7] = 000 b ) -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 0 (00 h [11] = 0 b ) pr = 0 (00 h [10] = 0 b ) lp = 0 (00 h [9:7] = 000 b ) -360 -315 -270 -225 -180 -135 -90 -45 0 45 90 -20 -15 -10 -5 0 5 1e+0 10e+0 100e+0 1e+3 10e+3 100e+3 phase [] gain [db] frequency [hz] gain phase filter settings: hp = 0 (00 h [11] = 0 b ) pr = 1 (00 h [10] = 1 b ) lp = 0 (00 h [9:7] = 000 b )
tli4970-d050t5 functional description data sheet 14 rev. 1.1, 2016-06-17 2.6 increased temperature range the max. specified ambient operating temperature of 85c is limited due to the power dissipation in the current rail. the thermal loss finally in creases the junction temperature which has to be limited to 125c. reducing the current through the current rail decreases t he thermal loss and therewith a higher ambient operating temperature is possible.
tli4970-d050t5 specification data sheet 15 rev. 1.1, 2016-06-17 3 specification 3.1 absolute maximum ratings attention: stresses above the limit values listed here may cause permanent damage to the device. exposure to absolute maximum rating conditions for extended periods may affect device reliability. maximum ratings are absolute ratings; exceeding only one of these values may cause irreversible damage to the integrated circuit. 3.2 operating conditions table 3-1 absolute maximum ratings general conditions (unless otherwise specified): v dd = 3.3 v; t a = -40 c ... +85 c parameter symbol values unit note / test condition min. typ. max. supply voltage v dd -0.3 - +3.6 v maximum primary current i p -60 - +60 a t a = t contact_ip_in 1) 1) t contact_ip_in : temperature of current ra il on pcb at solder joint. maximum primary pulse current i p_pulse - - 150 a max. 3 pulses, 200 ms each; tested with 105 m cu layer on pcb voltage on interface pins dout, sclk & ocd v io -0.3 - +3.6 v voltage on interface pin cs v io_cs -0.3 - +21.0 v esd voltage 2) 2) according to standard eia / jesd22-a114-e human body model (hbm) v esd_hbm --2kv maximum junction temperature t j_max --+125c storage temperature t a_store -40 - +125 c not connected table 3-2 electrical operating parameters general conditions (unless otherwise specified): v dd = 3.3 v; t a = -40 c ... +85 c parameter symbol values unit note / test condition min. typ. max. supply voltage v dd 3.1 3.3 +3.5 v voltage on interface pin cs v io_cs v io_prog -0.3 +20.5 - - +3.6 +20.7 v v normal operation only during programming current consumption i dd 5 12 20 ma secondary side full-scale primary current measurement range i pfsr -50 - +50 a
tli4970-d050t5 specification data sheet 16 rev. 1.1, 2016-06-17 primary resistance r p - - 0.6 - - 1.0 m ? m ? resistance of current rail t a = 25c t j_max ambient temperature t a -40 - +85 c t a = t contact_ip_in 1) 1) t contact_ip_in : temperature of current ra il on pcb at solder joint. table 3-3 accuracy parameters general conditions (unless otherwise specified): v dd = 3.3 v; t a = -40 c ... +85 c parameter symbol values unit note / test condition min. typ. max. relative offset error roe -0.05 -0.075 -0.15 - - - +0.05 +0.075 +0.15 % of i pfsr % of i pfsr % of i pfsr @ 0a dc & t a = 25c @ 0a dc & t a = -40c @ 0a dc & t a = 85c absolute offset error aoe -25.0 -37.5 -75.0 - - - +25.0 +37.5 +75.0 ma ma ma @ 0a dc & t a = 25c @ 0a dc & t a = -40c @ 0a dc & t a = 85c relative total error (gain, offset, linearity) incl. lifetime-drift and whole temperature range 1) 1) valid for soldered parts on pcb based on the footprint recommendation in figure 5-3 and a copper thickness of 70 m rte -3.5 - +3.5 % of i p percentage of indicated value absolute total error (gain, offset, linearity) incl. lifetime-drift and whole temperature range 1) ate -35.0 - +35.0 ma/a absolute total error proportional to i p update rate f update -80- ksps 2) 2) ksps: thousand sa mples per second resolution g -12.5- ma / lsb 13-bit current value via spi noise 3) 3) characterized in lab for small signals; i p = 0 ma i noise -10- ma rms @ t a = 25c & bw i = 1.1 khz 4) 4) bandwidth settings will affect noise bandwidth of current measurement path bw i_min bw i_max - - 70 18 - - hz khz -3 db cutoff; see section 2.5 for filter settings power-on time - - 15 ms to stable and accurate output data table 3-2 electrical operating parameters (cont?d) general conditions (unless otherwise specified): v dd = 3.3 v; t a = -40 c ... +85 c parameter symbol values unit note / test condition min. typ. max.
tli4970-d050t5 specification data sheet 17 rev. 1.1, 2016-06-17 figure 3-1 distribution of the maximum total error current [a] 0 10 20 30 40 50 -10 -20 -30 -40 -50 error [ma] error [% of full scale] current [% of full scale] -1750 -1500 -1250 -1000 0 250 750 1250 1750 3.5 2.5 1.5 0.5 0 -0.5 -1.0 -2.5 -3.5 0 20 40 80 100 -80 -60 -40 -100 accuracy 0h accuracy over lifetime 1) 1) according to performed stress tests during qualification; soldered parts on pcb based on the footprint recommendation and a copper thickness of 70 m -20 60 1.0 2.0 3.0 -1.5 -2.0 -3.0 -750 -500 -250 500 1000 1500
tli4970-d050t5 specification data sheet 18 rev. 1.1, 2016-06-17 3.3 fast over current output the fast over current (ocd) pin allo ws fast detection of an over curr ent in the measurement path. the ocd signal path is independent from the bandwidth limited current signal path and has a programmable glitch filter to avoid false triggers by noise spikes on the current ra il. the symmetric threshold level of the ocd output is adjustable and triggers an over current event in case of a positive or negative over current. in addition a zero-crossing functionality can be programmed (i n this case the over current detection is disabled). if connected via an external pull-up resistor to a logic in put pin of the microcontroller, it can be used to trigger an interrupt in the microcontroller and quickly shut off the s ystem to avoid damage from the over current event. the ocd pin has an open-drain output that allows monitoring of several current sensors via only one microcontroller input pin. for details, please refer to the application circuit shown in figure 3-2 . the instruction for the settings can be found in the tli4970 programming guide. table 3-4 ocd output parameter general conditions (unless otherwise specified): v dd = 3.3 v; t a = -40 c ... +85 c parameter symbol values unit note / test condition min. typ. max. threshold level 1) 1) symmetric threshold level for positive and negative currents i thr 3 - 90 a programmable (eeprom). default factory value 57a. accuracy x ocd -10- % i pfsr response time of fast over current detection 2)3) 2) falling edge level of ocd-pin <0,5v dd 3) characterized in lab under worst case test conditions: r pu = 4.7k ? to v dd ; c l = 1 nf to gnd t d_oc -1.83.5 s only valid for ? i/ ? t < 500 ka/s load capacitance c l --1nfto gnd open-drain current i od_on - - 1 ma resistive to v dd ; v od_on 0.2 x v dd pull-up resistor r pu 4.7 - - k ? to v dd de-glitch filter time t deglitch - 750 - ns default factory value
tli4970-d050t5 specification data sheet 19 rev. 1.1, 2016-06-17 3.4 application circuit figure 3-2 application circuit for readout of multiple sensors in parallel bus mode table 3-5 typical ap plication values name value r pu 47 k ? r l 100 k ? c s 100 nf vdd gnd sclk dout ocd cs sensor 1 c vdd gnd sclk spi-data-in cs1 cs2 interrupt-in r l r pu c s c s +3.3 v power interface controller logic i/o vdd gnd sclk ocd cs sensor 2 dout
tli4970-d050t5 specification data sheet 20 rev. 1.1, 2016-06-17 3.5 isolation characteristics the tli4970-d050t5 is qualified and tested accord ing iec and ul standards (functional isolation). table 3-6 isolation parameters according to iec 60747-5-2 description symbol characteristic unit maximum rated working voltage (sine wave) 1)2)3) 1) refer to iec 60747-5-2 for a detailed description of voltages and partial discharge tests 2) the given value is just an example based on pollution degree 2 3) according to performed stress test (85c, 85% relative hu midity, 1000 h test time & 600 v applied insulation voltage) u iowm 424 v rms maximum repetitive isolatio n voltage (max. dc-voltage) 1)3) u iorm 600 v peak maximum transient over voltage 1)3) u iotm 3600 v peak apparent charge test voltage (method b) 1)3) partial discharge < 5pc u pd,b 900 v peak isolation test voltage (1 sec) 1) u iso 2546 v rms maximum surge voltage (1.2 / 50 s) 1) u iosm 3600 v peak minimum external creepage distance cpg 3.0 mm minimum external clea rance distance clr 3.0 mm minimum comparative tracking index cti 575 (material group ii) isolation resistance, u io = 500 v 4) 4) not subject to production test - ve rified by design/characterization r io > 10 10 ? table 3-7 isolation parameters according to ul 1577 description symbol characteristic unit maximum rated isolation voltage (1 min.) u iso 2546 v rms isolation test voltage (1 sec) u iso 2546 v rms
tli4970-d050t5 specification data sheet 21 rev. 1.1, 2016-06-17 3.6 csa component acceptance the following section describes the test co ndition for the csa component acceptance. 3.6.1 board description for csa co mponent acceptance test conditions the device was soldered on a test board described in figure 3-4 and table 3-9 . besides, a heat sink was mounted ( figure 3-3 ). figure 3-3 test board setting table 3-8 absolute maximum ratings according to csa component acceptance description symbol characteristic unit absolute maximum ambient temperature t a_ca 85 c absolute maximum isolation voltage 1) 1) test conditions: 60 hz for 60 s u iso_ca 2546 v rms absolute maximum current 2) 2) test condition: 4h, the device was mounted on the pcb described below i pfsr_ca 50 a 3) 3) rms or dc table 3-9 test board parameters description value dimension 85 mm x 36 mm pcb material fr4 pcb thickness 1.55 m no. of copper layers 4 thickness of each copper layer 105 m pcb device heat sink
tli4970-d050t5 specification data sheet 22 rev. 1.1, 2016-06-17 figure 3-4 dimension and layout of test board in table 3-10 and figure 3-5 the used heat sink is described. figure 3-5 heat sink dimension (in mm table 3-10 heat sink parameters description value type sk68 manufacturer fischer elektronik dimension 33 mm x 46 mm x 50 mm thermal resistance 4.8 k/w bothsidesopen bothsidesopen 85mm 36mm 35,6 46 1 7 3 3 2 2 36,75 6,25 7,5 7,5 6,25 5,2 3 1
tli4970-d050t5 interfaces data sheet 23 rev. 1.1, 2016-06-17 4 interfaces 4.1 spi interface definition the tli4970-d050t5 has a 3-pin serial peripheral interfac e (spi). a standard unidirecti onal 16-bit spi protocol is used. several sensors can be connected to a parallel spi bus. an example on how to connect multiple sensors is given in figure 3-2 . the timing parameters are given in table 4-1 . 4.1.1 logical interface all spi frames are based on a 16-bit word. a parity bit in each spi frame allows the detection of transmission errors and increases the reliability of the measured data. the trans mission of the data is triggered by the cs -pin. 4.1.1.1 protocol description the internal data register is continu ously updated with the internal update rate f update . when cs is pulled to low, the actual value from the data register is written into t he spi output register. like in standard spi protocol, the sensor starts to transmit the data when clock pulses are applied to the sclk pin and the cs -pin is still low. with the next 16 clock pulses, the data word is sent out via the dout pin. if more than 16 clock pulses are sent by the spi-master and the cs -pin stays low, the sensor sends 0?s for all ad ditional clock pulses. if a new sample should be read from the sensor, the cs -pin has to return to the high state for at least the time t cson before pulling it to low again in order to trigger the next sample readout. the clock pulses are ignored and the dout pin is in high ohmic state, when the cs -pin is in ?high? state. therefore multiple chips can be readout on the same data bus by sequentially selecting the addressed sensor via the cs -pin. 4.1.1.2 description of the spi data frames there are two different types of spi frames sent from the sensor. the ?sensor status message? and the ?sensor value message?. the two types are distinguished by th e status bit. the data section contains different information. for details see below. general structure of the 16-bit spi data frame note: all fields marked as ?r? are read-only values. 4.1.1.3 sensor current message the actual measurement current value is returned in the sensor value message. general offset reset value 16-bit spi data frame 00 h 4000 h 15 0 15 15 r stat 14 14 r par 13 0 r data
tli4970-d050t5 interfaces data sheet 24 rev. 1.1, 2016-06-17 structure of the sensor value message 4.1.1.4 sensor status message the sensor status word co ntains information about temperature and load conditions and is sent under the following conditions: ? once after start-up (?sensor restarted?) ? during the sensor start-up phase when a command is sent (?sensor busy?) ? if an internal error occurred (?sensor fail?) structure of the sensor status message value offset reset value value of the actual current measurement 01 h 4000 h field bits type description 015r status status identifier of a sensor value word par 14 r parity bit odd parity of current value. this bit is set in a way that the sum of all bits in the value word is odd. ocd 13 r ocd-state over current comparator value 0 b no over current 1 b over current detected current 12:0 r current value actual measured current value. status offset reset value sensor status message 02 h 8000 h 15 0 15 15 r 0 14 14 r par 13 13 r ocd 12 0 r current 15 0 15 15 r 1 14 14 r par 13 13 r hw 12 12 r ol 11 11 r ot 10 10 r com 90 r reserved
tli4970-d050t5 interfaces data sheet 25 rev. 1.1, 2016-06-17 4.1.2 physical spi interface the tli4970-d050t5 has a 3-pin unidirectional spi interfac e. this interface can be driven with a clock up to 5 mhz. the timing parameters are given in table 4-1 . electrical characteristics are given in table 4-2 . figure 4-1 spi interface timing: readout of sensor data field bits type description 115r status status identifier of a sensor status word par 14 r parity bit odd parity of current value. this bit is set in a way that the sum of all bits in the status word is odd. hw 13 r hardware error 0 b ok 1 b internal error; sensor not usable ol 12 r overload error 0 b ok 1 b overload (current outside i pfsr range) ot 11 r temperature error 0 b ok 1 b temperature out of range com 10 r communication error 0 b ok 1 b no multiple of 16 sclk cyc les detected in last frame reserved 9:0 r reserved don?t care - reserv ed for future use sclk dout cs t spi t clh t cll t css t ds t dz t csh t cson msb lsb
tli4970-d050t5 interfaces data sheet 26 rev. 1.1, 2016-06-17 4.2 serial inspection and conf iguration interface (sici) the serial inspection and co nfiguration interf ace is only used for eeprom progr amming. this interface is a one wire interface provided by a double se izure of the ocd pin. to guarantee a proper sici communication current must not flow through the primary conductor (to avoid in terferences with potential over current detection). the instruction for the serial inspection and configuration interface can be fo und in the tli4970 programming guide. table 4-1 interface timing parameters 1) (5mhz spi clock speed) general conditions (unless otherwise specified): v dd = 3.3 v; t a = -40 c ... +85 c 1) all timing parameters are valid on the sensor pin with the s pecified test load only. different loading due to pcb mounting might result in different timing. parameter symbol values unit note / test condition min. typ. max. spi speed (1 / bit time) f spi - - 5 mhz duty cycle ratio 45% ... 55% spi period t spi 200 - - ns sclk duty cycle t clh / t cll 45 - 55 % cs setup time t css 95 - - ns r l 100 k ? c l 50 pf to gnd cs hold time t csh 95 - - ns r l 100 k ? c l 50 pf to gnd data setup time t ds - - 65 ns delay between cs rising edge and end of dout data t dz - - 75 ns cs high time t cson 300 - - ns table 4-2 interface electrical characteristics (5mhz spi clock speed) general conditions (unless otherwise specified): v dd = 3.3 v; t a = -40 c ... +85 c parameter symbol values unit note / test condition min. typ. max. output level low (spi) v ol - - 0.2 x v dd v resistive load; 1 ma to gnd output level high (spi) v oh 0.8 x v dd - - ns resistive load; 1 ma to gnd input level low (spi) v il -0.1 - 0.3 x v dd v input level high (spi) v ih 0.7 x v dd - v dd v input level hysteresis (spi) 0.05 x v dd -- v input capacitance c i - - 100 pf for all digital input pins input resistance r i 100 - - k ? for all digital input pins load capacitance c l - - 50 pf to gnd; for all digital output pins load resistance r l 100 - - k ? to v dd ; for all digital output pins
tli4970-d050t5 package data sheet 27 rev. 1.1, 2016-06-17 5 package the tli4970-d050t5 is packaged in a rohs compliant, halogen-free leadless package (qfn-like). 5.1 pg-tison-8-1 package outline figure 5-1 pg-tison-8-1 package dimensions all dimensions in millimeter
tli4970-d050t5 package data sheet 28 rev. 1.1, 2016-06-17 5.2 packing figure 5-2 carrier tape of the pg-tison-8-1 package all dimensions in millimeter
tli4970-d050t5 package data sheet 29 rev. 1.1, 2016-06-17 5.3 footprint recommendation figure 5-3 footprint recommendation for reflow soldering 5.4 pcb layout recommendation the pcb layout recommendation shown in figure 5.4 leads to the preferred current flow through the housing to achieve the highest accuracy. figure 5-4 pcb layout recommendation all dimensions in millimeter
tli4970-d050t5 package data sheet 30 rev. 1.1, 2016-06-17 5.5 laser marking figure 5-5 laser marking on the top side infineon tli4970 d050t5 x x h w w y y x x x x date code yy: year ww: week information: green package (rohs compliant and halogen-free) lot no. sales code marker for orientation (pin 1 is below) internal tracking no. (subject to change without notice)
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