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| june 2011 doc id 11095 rev 2 1/18 18 td352 advanced igbt/mosfet driver features 1.7 a sink / 1.3 a source (typ) current capability active miller clamp feature desaturation detection adjustable turn-on delay uvlo protection 2k v esd protection applications 1200 v 3-phase inverter motor control systems ups description this device is an advanced gate driver for igbts and power mosfets. control and protection functions are included and allow the design of high reliability systems. the innovative active miller clamp function eliminates the need for negative gate drive in most applications and allows the use of a simple bootstrap supply for the high side driver. the td352 includes an adjustable turn-on delay. this feature can be used to implement reliable deadtime between high and low sides of a half bridge. an external resistor and capacitor are used to provide accurate timing. so-8 table 1. device summary order codes temperature range package packaging td352id -40c, +125c so-8 tube td352idt tape and reel www.st.com
contents td352 2/18 doc id 11095 rev 2 contents 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.1 input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.2 voltage reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.3 active miller clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.4 turn-on delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.5 desaturation protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.6 output stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.7 undervoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 typical performance curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8 application diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 10 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 td352 block diagram doc id 11095 rev 2 3/18 1 block diagram figure 1. td352 block diagram ! - v 4 $ / 5 4 ( 6 . ) 6 2 % & 6 , $ % 3 ! 4 # $ # , ! - 0 # o n t r o l " l o c k 6 r e f 5 6 , / $ e s a t $ e l a y 6 k 8 * pin connections td352 4/18 doc id 11095 rev 2 2 pin connections figure 2. pin connections (top view) table 2. pin description pin n name type function in 1 analog input input vref 2 analog output +5 v reference voltage cd 3 timing capacitor turn on delay desat 4 analog input desaturation protection clamp 5 analog output miller clamp vl 6 power supply signal ground out 7 analog output gate drive output vh 8 power supply positive supply , 1 9 5 ( ) & ' ' ( 6 $ 7 7 ' 9 + 2 8 7 9 / & / $ 0 3 ! - v td352 absolute maximum ratings doc id 11095 rev 2 5/18 3 absolute maximum ratings table 3. absolute maximum ratings symbol parameter value unit vhl maximum supply voltage (vh - vl) 28 v v out voltage on out, clamp, desat pins vl-0.3 to vh+0.3 v v other voltage on other pins (in, cd, vref) -0.3 to 7 v p d power dissipation 500 mw t stg storage temperature -55 to 150 c t j maximum junction temperature 150 c r thja thermal resistance junction-ambient 150 c/w esd electrostatic discharge (hbm) 2 kv table 4. operating conditions symbol parameter value unit vh positive supply voltage vs. vl uvlo to 26 v t oper operating free air temperature range -40 to 125 c electrical characteristics td352 6/18 doc id 11095 rev 2 4 electrical characteristics t a = -20 to 125 c, vh = 16 v, unless otherwise specified. table 5. electrical characteristics symbol parameter test condition min typ max unit input v ton in turn-on threshold voltage 0.8 1.0 v v toff in turn-off threshold voltage 4.0 4.2 v i inp in input current in input voltage < 4.5v 1 a voltage reference (1) v ref voltage reference t = 25c 4.85 5.00 5.15 v i ref maximum output current 10 ma clamp v tclamp clamp pin voltage threshold 2.0 v v cl clamp low voltage i csink = 500ma 2.5 v delay v tdel voltage threshold 2.5 v r del discharge resistor i=1ma 500 ? desaturation protection v des desaturation threshold vh-2 v i des source current 250 a output i sink output sink current v out = 6v 1000 1700 ma i src output source current v out = vh-6v 750 1300 ma v ol1 output low voltage 1 i osink = 20ma 0.35 v v ol2 output low voltage 2 i osink = 500ma 2.5 v v oh1 output high voltage 1 i osource = 20ma vh-2.5 v v oh2 output high voltage 2 i osource = 500ma vh-4.0 v t r rise time c l = 1nf, 10% to 90% 100 ns t f fall time c l = 1nf, 90% to 10% 100 ns t don turn on propagation delay 10% out change: r d = 4.7k ? , no c d r d = 11k ? , c d = 220 pf 1.8 2.0 500 2.2 ns s t doff turn off propagation delay 10% out change 400 ns td352 electrical characteristics doc id 11095 rev 2 7/18 under voltage lockout (uvlo) uvloh uvlo top threshold 10 11 12 v uvlol uvlo bottom threshold 9 10 11 v v hyst uvlo hysteresis uvloh-uvlol 0.5 1 v supply current i in quiescent current out = 0v; no load 2.5 ma 1. recommended capacitor range on vref pin is 10 nf to 100 nf table 5. electrical characteristics (continued) symbol parameter test condition min typ max unit functional description td352 8/18 doc id 11095 rev 2 5 functional description 5.1 input stage the td352 in input is internally clamped at about 5 v to 7 v. the input is triggered by the signal edge. when using an open collector optocoupler, the resistive pull-up resistor can be connected to either vref or vh. recommended pull-up resistor value with vh=16 v is from 4.7 k ? to 22 k ? . 5.2 voltage reference a voltage reference is used to create accurate timing for the turn-on delay with external resistor and capacitor. a decoupling capacitor (10 nf to 100 nf) on the vref pin is required to ensure good noise rejection. 5.3 active miller clamp the td352 offers an al ternative solution to the problem of miller current in igbt switching applications. instead of driving the igbt gate to a negative voltage to increase the safety margin, the td352 uses a dedi cated clamp pin to control th e miller current. when the igbt is off, a low impedance path is established between the igbt gate and emitter to carry the miller current, a nd the voltage spike on the igbt gate is greatly reduced. during turn-off, the gate voltage is monitore d and the clamp output is activated when the gate voltage goes below 2 v (relative to vl). the clamp voltage is vl+4v max for a miller current up to 500 ma. the clamp is disabled when the in input is triggered again. the clamp function does not affect the turn-off characteristic, but only keeps the gate at low level throughout the off time. the main benefit is that negative voltage can be avoided in many cases, allowing a bootstrap technique for the high side driver supply. 5.4 turn-on delay turn-on (t a ) delay is programmable through external resistor r d and capacitor c d for accurate timing. t a is approximately given by (see figure 5 ): t a (s) = 0.7 * r d (k ? ) * c d (nf) the turn-on delay can be disabled by connecting the cd pin to vref with a 4.7 k ? resistor. input signals with on-time smaller than t a are ignored. td352 functional description doc id 11095 rev 2 9/18 5.5 desaturation protection desaturation protection ensures the protection of the igbt in the event of overcurrent. when the desat voltage goes higher than vh-2v, the td352 out pin is driven low. the fault state is only exited afte r a power-down and power-up cycle. a programmable blanking time is used to allow enough time for igbt saturation. blanking time is provided by an internal current source and external c des capacitor. the t bdes blanking time value is given by: t bdes = v des * c des / i des at vh=16v, t bdes is approximately given by: t bdes (s) = 0.056 * c des (pf) 5.6 output stage the output stage is able to sink/source 1.7 a/1.3 a (typical) at 25 c and 1.0 a/0.75 a min. over the full temperature range. this current capability is sp ecified near the usual igbt miller plateau. 5.7 undervoltage protection undervoltage detection protects the application in the event of a low vh supply voltage (during startup or a fault situation). during undervoltage, the out pin is driven low (active pull-down for vh>2v, and passive pull-down for vh<2v). figure 3. undervoltage protection 6 ( / 5 4 6 5 6 , / ( 5 6 , / , 6 c c m i n & ! 5 , 4 " . w functional description td352 10/18 doc id 11095 rev 2 figure 4. detailed internal schematic " . w 6 ( 6 , 6 2 % & # , ! - 0 / 5 4 5 % q o r a & g n c [ 1 h h 6 % q o r a + p r w v ) . 6 6 5 6 , / 6 6 r e f # o n t r o l " l o c k % q o r a % n c o r 6 $ % 3 ! 4 # $ 8 w # 6 ( % q o r a & g u c v 6 ( 6 5 td352 timing diagrams doc id 11095 rev 2 11/18 6 timing diagrams figure 5. general turn-on and turn-off sequence figure 6. input and output waveform dynamic parameters ! - v ) . / 5 4 6 c e 6 ( l e v e l 6 g e 6 ( l e v e l 6 , l e v e l # , ! - 0 6 , l e v e l 4 a # l a m p t h r e s h o l d # $ / p e n 4 w i n 4 w o u t - i l l e r p l a t e a u ! - v e d g e m o d e / 5 4 6 ( l e v e l 6 , l e v e l 4 w o u t t d o n t d o f f 6 t o n 6 t o f f ) . 4 w i n 6 t o n 6 t o f f l e v e l m o d e ) . timing diagrams td352 12/18 doc id 11095 rev 2 figure 7. desaturation fault ! - v ) . / 5 4 $ % 3 ! 4 6 6 ( l e v e l # $ 6 , l e v e l 4 a 6 ( 6 $ e s a t " l a n k i n g 4 i m e td352 typical performance curves doc id 11095 rev 2 13/18 7 typical performance curves figure 8. quiescent current vs temperature figure 9. rdel resistance vs temperature ! - v 7 h p s ? & , q p $ ! - v 7 h p s ? & 5 g h o 2 k p v figure 10. low level output voltage vs temp. figure 11. high level output voltage vs temp. ! - v 7 h p s ? & 9 2 / 9 / 9 ) o s i n k m ! ) o s i n k m ! 7 h p s ? & 9 2 / 9 / 9 ) o s i n k m ! ) o s i n k m ! ! - v 7 h p s ? & 9 + 9 2 + 9 ) o s o u r c e m ! ) o s o u r c e m ! 7 h p s ? & 9 + 9 2 + 9 ) o s o u r c e m ! ) o s o u r c e m ! typical performance curves td352 14/18 doc id 11095 rev 2 figure 12. sink current vs temperature figure 13. source current vs temperature ! - v 7 h p s ? & , v l q n p $ ! - v 7 h p s ? & , v u f p $ td352 application diagrams doc id 11095 rev 2 15/18 8 application diagrams figure 14. single supply igbt drive with active miller clamp and desat protection figure 15. use of desat input for direct overcurrent detection figure 16. large igbt drive with negative voltage gate drive and optional current buffers ! - v 4 $ / 5 4 ( 6 . ) 6 2 % & 6 , $ % 3 ! 4 # $ # , ! - 0 # o n t r o l " l o c k 6 r e f 5 6 , / $ e s a t $ e l a y 6 k 8 * ! - v 4 $ / 5 4 ( 6 . ) 6 2 % & 6 , # $ # , ! - 0 # o n t r o l " l o c k 6 r e f 5 6 , / $ e l a y 6 $ % 3 ! 4 $ e s a t k 8 * 6 r e f ! - v / 5 4 ( 6 . ) 6 6 2 % & 6 , 6 / p t i o n a l # $ # , ! - 0 / p t i o n a l 4 $ # o n t r o l " l o c k 5 6 , / 6 r e f $ e l a y $ % 3 ! 4 $ e s a t k 8 * package mechanical data td352 16/18 doc id 11095 rev 2 9 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark. figure 17. so-8 mechanical drawing table 6. so-8 mechanical data dim. mm. inch min. typ max. min. typ. max. a 1.35 1.75 0.053 0.069 a1 0.10 0.25 0.04 0.010 a2 1.10 1.65 0.043 0.065 b 0.33 0.51 0.013 0.020 c 0.19 0.25 0.007 0.010 d 4.80 5.00 0.189 0.197 e 3.80 4.00 0.150 0.157 e 1.27 0.050 h 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 l 0.40 1.27 0.016 0.050 k (max.) 8 ddd 0.1 0.04 # td352 revision history doc id 11095 rev 2 17/18 10 revision history table 7. document revision history date revision changes 01-nov-2004 1 initial release 13-jun-2011 2 deleted order code td352in. content reworked to improve readability. td352 18/18 doc id 11095 rev 2 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 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