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| ZXLD1350Q document number: ds37076 rev. 1 - 2 1 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q automotive grade 350ma buck led driver description the ZXLD1350Q is a hysteretic mode inductive step - down converter with integrated switch and high side current sense. it operates from an input sup ply from 7v to 30v driving single or multiple series connected leds efficiently external adjustable output current up to 350ma . the output current can be adjusted by applying a dc voltage or a pwm waveform. 100:1 adjustment of output current is possible using pwm control. applying a voltage of 0.2v or lower to the adj pin turns the output off and switches the device into a low current standby state. the ZXLD1350Q has been qualified to aecq100 grade 2 and is automotive grade supporting ppaps. pin assignments features ? simple low parts count ? internal 30v ndmos switch ? internal pwm filter ? high efficiency (up to 95% ( note 1 ) ? wide input voltage range: 7v to 30v ? 40v transient capability ? up to 1mhz switching frequency ? typical 4% output current accuracy ? green molding (no br, sb) in t sot2 5 ? totally lead - free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. green device (note 3) ? automotive grade ? qualified to aec - q100 standards for high reliability ? supports ppap documents (note 4 ) notes: 1. no purposely added lead. fully eu directive 2002/95/ec (rohs) & 2011/65/eu (rohs 2) compliant. 2. see http://www.diodes.com/quality/lead_free.html for more information about diodes incorporateds definitions of halogen - and antimony - free, "green" and lead - free. 3. halogen - and antimony - free "green products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <100 0ppm antimony compounds. 4. automotive products are aec - q100 qualified and are ppap capable. automotive, aec - q100 and standard products are electrically and thermally the same, except where specified. for more information, please refer to http://www.diod es.com/quality/product_compliance_definitions/. typical application circuit i sense v in adj gnd lx tsot23-5 top view set v in lx gnd adj zxld1350 r s 0.33 ? l1 47 h c1 1 f gnd v in 7~30v
ZXLD1350Q document number: ds37076 rev. 1 - 2 2 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q block diagram figure 1 . block diagram C pin connection pin description name pin no. description lx 1 drain of ndmos switch gnd 2 ground (0v) adj 3 multi - function on/off and brightness control pin: ? leave floating for normal operation ? v adj = v ref =1.25v ? giving nominal average output current ? i outnom =0.1/r s ) ? drive to voltage below 0.2v to turn off output current . ? drive with analog voltage : ? 0.3v ZXLD1350Q document number: ds37076 rev. 1 - 2 3 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q absolute maximum ratings (voltages to gnd unless otherwise stated) symbol parameter rating unit v in input voltage - 0.3 to +30 (40v for 0.5 sec) v v sense i sense voltage +0.3 to - 5 (measured with respect to v in ) v v lx lx output voltage - 0.3 to +30 (40v for 0.5 sec) v v adj adjust pin input voltage - 0.3 to +6 v i lx switch output current 500 ma p tot power dissipation (refer to package thermal de - rating curve on page 1 7 ) 450 mw t st storage temperature - 55 to 150 c t j max junction temperature 150 c esd susceptibility hbm human body model 500 v cdm charged device model 1000 mm machine model 100 v caution : s tresses greater than the 'absolute maximum ratings' specified above, may cause permanent damage to the device. these are stre ss ratings only; functional operation of the device at conditions between maximum recommended operating conditions and absolute maximum ratings is not implied. device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. ( semiconductor devices are esd sensitive and may be damaged by exposure to esd events. suitable esd precautions should be taken when handling and transporting these devices. ) thermal resistance symbol parameter rating unit ? junction to ambient 200 c/w recommended operating conditions symbol parameter min typ. max units v in input voltage 7 30 v t offmin minimum switch off - time 800 ns t onmin minimum switch on - time 800 ns d lx duty cycle range 0.01 0.99 t a ambient o perating t emperature range - 40 +105 c i lx_cont average/rms lx switch current 0.37 a f lxmax recommended maximum operating frequency 1 mhz t pd internal comparator propagation delay 50 ns ZXLD1350Q document number: ds37076 rev. 1 - 2 4 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q electrical characteristics (test conditions: v in = 12v, t amb = + 25c, unless otherwise specified.) symbol parameter condition min. typ. max. unit v su internal regulator start - up threshold v in rising 4.8 v i inqoff quiescent supply current with output off adj pin grounded 15 20 a i inqon quiescent supply current with output switching adj pin floating , f = 250khz 250 500 a v sense mean current sense threshold voltage (defines led current setting accuracy) measured on i sense pin with respect to v in v adj = 1.25v 95 100 105 mv v sensehys sense threshold hysteresis 15 % i sense i sense pin input current v sense = v in - 0.1 1.25 10 a v ref internal reference voltage measured on adj pin with pin floating 1.21 1.25 1.29 v ? v ref / ? t temperature coefficient of v ref 50 ppm/c v adj external control voltage range on adj pin for dc brightness control (note 5 ) 0.3 2.5 v v adjoff dc voltage on adj pin to switch device from active (on) state to quiescent (off) state v adj falling 0.15 0.2 0.25 v v adjon dc voltage on adj pin to switch device from quiescent (off) state to active (on) state v adj rising 0.2 0.25 0.3 v r adj resistance between adj pin and v ref 135 250 k? i lxmean continuous lx switch current 0.37 a r lx lx switch on resistance 1.5 2 ? i lx(leak) lx switch leakage current 1 a d pwm(lf) duty cycle range of pwm signal applied to adj pin during low frequency pwm dimming mode pwm frequency <500hz pwm amplitude = v ref measured on adj pin 0.01 1 brightness control range 100:1 d pwm(hf) duty cycle range of pwm signal applied to adj pin during high frequency pwm dimming mode pwm frequency <10khz pwm amplitude = v ref measured on adj pin 0.16 1 brightness control range 5:1 f lx operating frequency (see graphs for more details) adj pin floating l = 100h (0.82v) i out = 350ma @ v led = 3.4v driving 1 led 250 khz t ss start up time (see graphs for more details) time taken for output current to reach 90% of final value after voltage on adj pin has risen above 0.3v. 500 s note: 5 . 100% brightness corresponds to v adj = v adj(nom) = v ref . driving the adj pin above v ref will increase the v sense threshold and output current proportionally. ZXLD1350Q document number: ds37076 rev. 1 - 2 5 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q device description the device, in conjunction with the coil (l1) and current sense resistor (r s ), forms a self - oscillating continuous - mode buck converter. device operation (refer to block diagram and figure 1 - operating waveforms) figure 1 . theoretical operating waveforms operation can be best understood by assuming that the adj pin of the device is unconnected and the voltage on this pin (v adj ) appears directly at the (+) input of the comparator. when input voltage v in is first applied, the initial current in l1 and rs is zero and there is no output from the current sense circuit. under this condition, the ( - ) input to the comparator is at ground and its output is high. this turns mn on and switches the lx pin low, causing current to flow from v in to ground, via r s , l1 and the led(s). the current rises at a rate determined by v in an d l1 to produce a voltage ramp (v sense ) across r s . the supply referred voltage v sense is forced across internal resistor r1 by the current sense circuit and produces a proportional current in internal resistors r2 and r3. this produces a ground referred ri sing voltage at the ( - ) input of the comparator. when this reaches the threshold voltage (v adj ), the comparator output switches low and mn turns off. the comparator output also drives another nmos switch, which bypasses internal resistor r3 to provide a co ntrolled amount of hysteresis. the hysteresis is set by r3 to be nominally 15% of v adj. when mn is off, the current in l1 continues to flow via d1 and the led(s) back to v in . the current decays at a rate determined by the led and diode forward voltages to produce a falling voltage at the input of the comparator. when this voltage returns to v adj , the comparator output switches high again. this cycle of events repeats, with the comparator input ramping between limits of v adj 15%. ZXLD1350Q document number: ds37076 rev. 1 - 2 6 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q device description (continued) switching thresholds with v adj =v ref , the ratios of r1, r2 and r3, define an average v sense switching threshold of 100mv (measured on the i sense pin with respect to v in ). the average output current i outnom is then defined by this voltage and rs according to: i outnom =100mv/r s nominal ripple current is 15mv/r s adjusting output current the device contains a low pass filter between the adj pin and the threshold comparator and an internal current limiting re sistor (200k nom) between adj and the internal reference voltage. this allows the adj pin to be overdriven with either dc or pulse signals to change the v sense switching threshold and adjust the output current. the filter is third order, comprising three s ections, each with a cut - off frequency of nominally 4khz. details of the different modes of adjusting output current are given in the applications section. output shutdown the output of the low pass filter drives the shutdown circuit. when the input volt age to this circuit falls below the threshold (0.2v nom), the internal regulator and the output switch are turned off. the voltage reference remains powered during shutdown to provide the bias current for the shutdown circuit. quiescent supply current duri ng shutdown is nominally 15ma and switch leakage is below 1ma. typical operating waveforms [v in = 12v, r s = 0.3v, l = 100 h] normal operation. output current (ch3) and lx voltage (ch1) start - up waveforms. output current (ch3), lx voltage (ch1) and v adj (ch2) ZXLD1350Q document number: ds37076 rev. 1 - 2 7 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q typical operating conditions ZXLD1350Q document number: ds37076 rev. 1 - 2 8 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q typical characteristics (continued ) ZXLD1350Q document number: ds37076 rev. 1 - 2 9 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q typical characteristics (cont inued ) ZXLD1350Q document number: ds37076 rev. 1 - 2 10 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q application information setting nominal average output current with external resistor r s the nominal average output current in the led(s) is determined by the value of the external current sense resistor (r s ) connected between v in and i sense and is given by: i outnom = 0.1 /r s [for r s ? 0. 27 ? ] the table below gives values of nominal average output current for several preferred values of current setting resistor (r s ) in the typical application circuit shown on page 1: r s (?) nominal average output current (ma) 0.27 370 0.30 333 0.33 300 0.39 256 the above values assume that the adj pin is floating and at a nominal voltage of v ref (=1.25v). note that r s = 0.27 v is the minimum allowed value of sense resistor under these conditions to maintain switch current below the specified maximum value. it is possible to use different values of r s if the adj pin is driven from an external voltage. (see next section). output current adjustment by external dc control voltage the adj pin can be driven by an external dc voltage (v adj ), as shown, to adjust the output current to a value above or below t he nominal average value defined by r s . the nominal average output current in this case is given by: i outdc = 0.08* v adj /r s for 0.3 < v adj < 2.5v note that 100% brightness setting corresponds to v adj = v ref . when driving the adj pin above 1.25v, r s must be increased in proportion to prevent i outdc exceeding 370 ma maximum. the inp ut impedance of the adj pin is 20 0k? 25% . gnd zxld1350 adj + dc gnd ZXLD1350Q document number: ds37076 rev. 1 - 2 11 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q application information ( continued ) output current adjustment by pwm control directly driving adj input a pulse width modulated (pwm) signal with duty cycle d pwm can be applied to the adj pin, as shown below, to adjust the output current to a value above or below the nominal average value set by resistor r s : driving the adj input via open collector transistor the recommended method of driving the adj pin and controlling the amplitude of the pwm waveform is to use a small npn switchi ng transistor as shown below: this scheme uses the 200 k resistor between the adj pin and the internal voltage reference as a pull - up resistor for the external transistor . driving the adj input from a microcontroller another possibility is to drive the device from the open drain output of a microcontroller. the diagram below shows one metho d of doing this: the diode and resistor suppress possible high amplitude negative spikes on the adj input resulting from the drain - source capacitance of the fet. negative spikes at the input to the device should be avoided as they may cause errors in output current, or err atic device operation. pwm dimming can be further split into high frequency and low frequency pwm dimming and how the device responds to these. v a d j gnd adj zxld1350 gnd 0v pwm adj zxld1350 gnd gnd pwm zxld1350 gnd adj 10k mcu ZXLD1350Q document number: ds37076 rev. 1 - 2 12 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q application information (continued) low frequency pwm mode when the adj pin is driven with a low frequency pwm signal (eg 100hz), with a high level voltage v adj and a low level of zero, the output of the internal low pass filter will swing between 0v and v adj , causing the input to the shutdown circuit to fall below its turn - off threshold (200mv nom) w hen the adj pin is low. this will cause the output current to be switched on and off at the pwm frequency, resulting in an av erage output current i outavg proportional to the pwm duty cycle. (see figure 2 - low frequency pwm operating waveforms). figure 2. low frequency pwm operating waveforms the average value of output current in this mode is given by: i outavg 0.1d pwm /r s for d pwm >0 01 this mode is preferable if optimum led 'whiteness' is required. it will also provide the widest possible dimming range (approx. 100:1) and higher efficiency at the expense of greater output ripple. note that the low pass filter introduces a small error in the output duty cycle due to the difference between the start - up and shut - down times. th is time difference is a result of the 200mv shutdown threshold and the rise and fall times at the output of the filter. to mi nimize this error, the pwm duty cycle should be as low as possible consistent with avoiding flicker in the led. ZXLD1350Q document number: ds37076 rev. 1 - 2 13 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q a pplication information (continued) high frequency pwm mode at pwm frequencies above 10khz and for duty cycles above 0.16, the output of the internal low pass filter will contain a dc component that is always above the shutdown threshold. this will maintain continuous device operation and the nominal average output current will be proportional to the average voltage at the output of the filter, which is directly proportional to the duty cycle. (see figure 3 C high frequency pwm operating waveforms). for best results, the pwm frequency should be maintained above the minimum specified value of 10khz , in order to minimize ripple at the output of the filter. the shutdown comparator has appro ximately 50mv of hysteresis, to minimize erratic switching due to this ripple. an upper pwm frequency limit of approximately one tenth of the operating frequency is recommend ed, to avoid excessive output modulation and to avoid injecting excessive noise in to the internal reference. figure 3. high frequency pwm operating waveforms the nominal average value of output current in this mode is given by: i outnom ? 0.1d pwm /r s for d pwm >0.16 this mode will give minimum output ripple and reduced radiated emission, but with a reduced dimming range (approx.5:1). the restricted dimming range is a result of the device being turned off when the dc component on the filter output falls below 200mv. shutdown mode taking the adj pin to a voltage below 0.2v for more than approximately 100s, will turn off the output and supply current will fall to a low standby level of 15a nominal. note that the adj pin is not a logic input. taking the adj pin to a voltage above v ref will increase output current above the 100% nominal average value. (see graphs for details). ZXLD1350Q document number: ds37076 rev. 1 - 2 14 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q application information (continued) soft - start the device has inbuilt soft - start action due to the delay through the pwm filter. an external capacitor from the adj pin to ground will provide additional soft - start delay, by increasing the time taken for the voltage on this pin to rise to the turn - on threshold and by slowing down the rate of rise of the control voltage at the input of the comparator. with no external capacito r, the time taken for the output to reach 90% of its final value is approximately 500s. adding capacitance increases this delay by approximately 0.5ms/nf. the graph below shows the variation of soft - start time for different values of capacitor. inheren t open - circuit led protection if the connection to the led(s) is open - circuited, the coil is isolated from the lx pin of the chip, so the device will not be damaged, unlike in many boost converters, where the back emf may damage the internal switch by forc ing the drain above its breakdown voltage. capacitor selection a low esr capacitor should be used for input decoupling, as the esr of this capacitor appears in series with the supply sourc e impedance and lowers overall efficiency. this capacitor has to supply the relatively high peak current to the coil and smooth the current ripple on the input supply. a minimum value of 1f is acceptable if the input source is close to the device, but higher values will improve performance at lower input voltages, espe cially when the source impedance is high. the input capacitor should be placed as close as possible to the ic. for maximum stability over temperature and voltage, capacitors with x7r, x5r, or better dielectric are recommended. capacitor s with y5v dielectr ic are not suitable for decoupling in this application and should not be used. a table of recommended manufacturers is provided below: manufacturer website murata www.murata.com taiyo yuden www.t - yuden.com kemet www.kemet.com avx www.avxcorp.com inductor selection recommended inductor values for the ZXLD1350Q are in the range 47h to 220h. higher values of inductance are recommended at higher supply voltages in order to minimize errors due to switching delays, wh ich result in increased ripple an d lower efficiency. higher values of inductance also result in a smaller change in output current over the supply voltage range. (see graphs). the inductor should be mounted as close to the device as possible with low resistance connections to the lx and v in pins. the chosen coil should have a saturation current higher than the peak output current and a continuous current rating above the required mean output current. ZXLD1350Q document number: ds37076 rev. 1 - 2 15 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q application information (continued) suitable coils for use with the ZXLD1350Q are listed in the table below: part no. l ( h ) dcr (v) i sat (a) manufacturer do1608c 47 0.64 0.5 coilcraft mss6132ml 47 0.38 0.56 68 0.58 0.47 100 0.82 0.39 cd104 - mc 220 0.55 0.53 sumida np04sb470m 47 0.27 0.38 taiyo yuden the inductor value should be chosen to maintain operating duty cycle and switch 'on'/'off' times within the specified limits over the supply voltage and load current range. the following equations can be used as a guide, with reference to figure 1 - operating waveforms. l x switch 'on' time note: t onnmin > 200ns lx switch 'off' time note: t offmin > 200ns where: l is the coil inductance (h) r l is the coil resistance ( ? ) i avg is the required led current (a) ? i is the coil peak - peak ripple current (a) {internally set to 0.3 x i avg } v in is the supply voltage (v) v led is the total led forward voltage (v) r lx is the switch resistance ( ? ) v d is the rectifier diode forward voltage at the required load current (v) example: for v in =12v, l=47h, rl=0.64v, v led =3.4v, i avg =350ma and v d =0.36v t on = (47e - 6 x 0.105)/(12 - 3.4 - 0.672) = 0.622s t off = (47e - 6 x 0.105)/(3.4 + 0.36 + 0.322)= 1.21s this gives an operating frequency of 546khz and a duty cycle of 0.34. these and other equations are available as a spreadsheet calculator from the diodes website. note that in practice, the duty cycle and operating frequency will deviate from the calculated values due to dynamic switchin g delays, switch rise/fall times and losses in the external components. optimum performance will be achieved by setting the duty cycle close to 0.5 at the nominal supply voltage. this helps to equa lize the undershoot and overshoot and improves temperature stability of the output current. ? ? lx l s avg led in on r r r i v v i l t ? ? ? ? ? ? ? ? ? l s avg d led off r r i v v i l t ? ? ? ? ? ? ZXLD1350Q document number: ds37076 rev. 1 - 2 16 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q application information (continued) diode selection for maximum efficiency and performance, the rectifier (d1) should be a fast low capacitance schottky diode with low reverse l eakage at the maximum operating voltage and temperature. the recommended diode for use with this part is the df ls1 4 0 q . this has approximately ten times lower leakage than standard schottky diodes, which are unsuitable for use above 85c. it also provides better efficienc y than silicon diodes, due to a combination of lower forward voltage and red uced recovery time. the table below gives the typical characteristics for the df ls1 4 0 q : diode forward voltage @ 3 00ma (mv) continuous current (ma) reverse leakage @ 30v 85c ( a ) package df ls1 4 0 q 41 0 1000 1 00 powerdi?123 if alternative diodes are used, it is important to select parts with a peak current rating above the peak coil current and a continuous current rating higher than the maximum output load current. it is very important to consider the reverse leakage of the diode when op erating above 85c. excess leakage will increase the power dissipation in the device. the higher forward voltage and overshoot due to reverse recovery time in silicon diodes will increase the peak voltage on the lx output. if a silicon diode is used, care should be ta ken to ensure that the total voltage appearing on the lx pin including supply ripple, does not exceed the specified maximum value. reducing output ripple peak to peak ripple current in the led(s) can be reduced, if required, by shunting a capacitor cled a cross the led(s) as shown below: a value of 1f will reduce nominal ripple current by a factor three (approx.). proportionally lower ripple can be achieved wi th higher capacitor values. note that the capacitor will not affect operating frequency or efficiency, but it will increase start - up delay, by reducing the rate of rise of led voltage. operation at low supply voltage the internal regulator disables the drive to the switch until the supply has risen above the start - up threshold (vsu). above this threshold, the device will start to operate. however, with the supply voltage below the specified minimum value, the switch duty cycle will be high and the device power dissipation will be at a maximum. care should be taken to avoid operating the device u nder such conditions in the application, in order to minimize the risk of exceeding the maximum allowed die temperature. (see next section on thermal considerations). note that when driving loads of two or more leds, the forward drop will normally be suff icient to prevent the device from switching below approximately 6v. this will minimize the risk of damage to the device. zxld1350 led cled l1 lx i sense d1 r s v in v in ZXLD1350Q document number: ds37076 rev. 1 - 2 17 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q application information (continued) thermal considerations when operating the device at high ambient temperatures, or when driving maximum load current, care must be taken to avoid exc eeding the package power dissipation limits. the graph below gives details for power derating. this assumes the device to be mounte d on a (25mm) 2 pcb with 1oz copper standing in still air. note that the device power dissipation will most often be a maximum at minimum supply voltage. it will also increase if the efficiency of the circuit is low. this may result from the use of unsui table coils, or excessive parasitic output capacitance on the switch output. thermal compensation of output current high luminance leds often need to be supplied with a temperature compensated current in order to maintain stable and reliable operation at all drive levels. the leds are usually mounted remotely from the device, so for this reason, the temperature coefficients of the internal circuits for the ZXLD1350Q have been optimized to minimize the change in output current when no compensation is employ ed. if output current compensation is required, it is possible to use an external temperature sensing network - normally using negative temperature coefficient (ntc) thermistors and/or diodes, mounted very close to the led(s). the output of the sensing net work can be used to drive the adj pin in order to reduce output current with increasing temperature. layout considerations lx pin the lx pin of the device is a fast switching node, so pcb tracks should be kept as short as possible. to minimize ground 'bounce', the ground pin of the device should be soldered directly to the ground plane. coil and decoupling capacitors it is particularly important to mount the coil and the input decoupling capacitor close to the device to minimize parasitic r esistance a nd inductance, which will degrade efficiency. it is also important to take account of any track resistance in series with curren t sense resistor rs. adj pin the adj pin is a high impedance input, so when left floating, pcb tracks to this pin should be as short as possible to reduce noise pickup. a 100nf capacitor from the adj pin to ground will reduce frequency modulation of the output under these conditions. an addition al series 10k resistor can also be used when driving the adj pin from an external circ uit (see below). this resistor will provide filtering for low frequency noise and provide protection against high voltage transients. high voltage tracks avoid running any high voltage tracks close to the adj pin, to redu ce the risk of leakage due to board contamination. any such leakage may raise the adj pin voltage and cause excessive output current. a ground ring placed around the adj pin will minimize changes i n output current under these conditions. zxld1350 gnd adj 100nf gnd 10k ZXLD1350Q document number: ds37076 rev. 1 - 2 18 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q ordering information de vice package code packag e (note 6 ) part mark packing: 7 tape and reel qualification grade (note 7 ) quantity per reel tape width part number suffix ZXLD1350Qet5ta et5 t sot25 1350 3000 8mm ta automotive grade note: 6 . pad layout as shown on diodes inc. suggested pad layout document ap02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf . 7 . ZXLD1350Q has been qualified to aec - q100 grade 2 and is classified as automotive grade support ing ppap documentation. see zxld1350 datasheet for commercial qualified versions. marking information ts ot25 xx xx : identification code : 1350 package outline dimensions please see ap02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version. tsot25 dim min max typ a ? ? 1.00 ? a1 0.01 0.10 ? a2 0.84 0.90 ? d ? ? 2.90 e ? ? 2.80 e1 ? ? 1.60 b 0.30 0.45 ? c 0.12 0.20 ? e ? ? 0.95 e1 ? ? 1.90 l 0.30 0.50 l2 ? ? 0.25 0 8 4 1 4 12 ? all dimensions in mm c a1 l e1 e a2 d e1 e 5x b ? 4x 1 ?? l2 a ZXLD1350Q document number: ds37076 rev. 1 - 2 19 of 19 www.diodes.com december 2014 ? diodes incorporated a product line of diodes incorporated ZXLD1350Q suggested pad layout please see ap02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other c hanges without further notice to this document and any product described herein. diodes incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license unde r its patent or trademark rights, nor the rights of others. any customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated do es not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemni fy and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arisin g out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized applicat ion. products described herein may be covered by one or more united states, international or foreign patents pending. product nam es and markings noted herein may also be covered by one or more united states, international or foreign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of this document is the final and determinative format released by diodes incorporated. life support diodes incorporated products are sp ecifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems are devices or sys tems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perform can be reasonably expe cted to cause the failure of the life support device or to affect its safety or effectiven ess. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety - related re quirements concerning their products and any use of diodes incorporated products in such safety - critical, life support devices or systems, notwithstanding any devices - or systems - related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety - critical, life support devices or systems. copyright ? 2014, diodes incorporated www.diodes.com dimensions value (in mm) c 0.950 x 0.700 y 1.000 y1 3.199 y1 c c x (5x) y (5x) |
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