L9337md triple low side driver wide input voltage range from -24v up to +45v wide operating supply voltage range from 4.5v up to 32v reverse biasing protected (v s = -24v) very low standby quiescent cur- rent < 2 m a programmable signal transfer polarity ttl and cmos compatible inputs defined output off state off for open inputs three open drain dmos outputs, with r dson = 1.5 w at 25c and v s > 6v output current limitation controlled output slope for low emi overtemperature shut-down integrated output clamping for fast inductive recirculation v fb > 45v status monitoring for - overtemperature - disconnected ground or supply voltage esd: all pins are guaranteed till 2kv human body model description the L9337md is a monolithic integrated triple low side driver realized in advanced multipower-bcd technology. it is intended to drive lines, lamps or relais in automotive or industrial applications. march 2000 ? = & thermal shutdown channel 1 diagnostic logic 4 reference vint vlogic channel 3 in1 prg en vs gnd out1 diag d97at370 block diagram so20 (12+4+4) ordering number: L9337md 1/8
absolute maximum ratings (no damage or latch) symbol parameter value unit v s supply voltage -24 to 45 v pin voltages v in input, enable, program -24 to 45 v v out output -0.3 to 45 v v diag diagnostic output -0.3 to 45 v pin description so 12+4+4 n o pin name function 8 vs supply voltage 4,5,6,7,14, 15,16,17 gnd ground 11 en enable 20 prg program 3 diag diagnostic 1 in1 input 1 2 in2 input 2 9 in3 input 3 19 out 1 output 1 18 out 2 output 2 13 out 3 output 3 10, 12 nc not connected in1 in2 diag gnd gnd gnd gnd vs in3 nc out3 gnd gnd gnd gnd out2 out1 prg 1 3 2 4 5 6 7 8 9 18 17 16 15 14 12 13 11 19 10 20 nc en d97at371a pin connections (top view) L9337md 2/8
thermal data symbol parameter so20 (2) so(12+4+4) (1) unit r th (j-pins) thermal resistance junction to pin C 14 (typ.) c/w r th (j-amb) thermal resistance junction to ambient mounted on smpcb2 board 77 to 97 C c/w t jmon temperature-monitoring switch-off-level switch-on-level 160 to 190 140 to 170 c c (1) see sgs-thomson microelectronics databook:"thermal management in surface mount technology" (2) see sgs-thomson microelectronics databook:"thermal characteristics of so20" operating conditions (the electrical characteristics are valid within the below defined operating ranges, unless otherwise specified. the function will be guaranted by design until t jmon switch-off-level. symbol parameter value unit v s supply voltage 4.5 to 32 v v in input pin voltage -24 to 45 v v en enable pin voltage -24 to 45 v v out , v d output pin voltage -0.3 to 45 v t j junction temperature -40 to 150 c electrical characteristics (refer to the test circuit, unless otherwise specified.) symbol parameter test condition min. typ. max. unit i q quiescent current -0.3v v en 0.5v; v s = 14v; t j = 85 c <2 10 m a en = high; v s 14v 1.5 2 ma inputs in1 - in3, prg v inilow input voltage low -24 2.0 v v inhigh input voltage high 2.8 45 v i in input current -24v vi 10v -10 15 m a enable input en v enlow input voltage low -24 1 v v enhigh input voltage high 3.2 vs v r en input impedance -24v < v i < 2.5v 10 k w i en input current 2.5v vi 25v 20 50 m a outputs out1-out3 r dson output on-resistor to ground v s 3 6v, i o = 0.3a t j = 25 c t j = 125 c 1.7 2.3 3.5 w w i oleak leakage current v o = v s = 14v; t j = 85 c 15 m a v oclamp output voltage during clamping time < 200 m s; 10ma io 0.3a 45 52 60 v i osc short-circuit current 400 700 1200 ma c o internal output capacities v o 3 4.5v 100 pf diagnostic output diag v dlow output voltage low i dl 1ma 0.3 0.5 v i dmax max. output current internal current limitation 1 5 15 ma i dleak leakage current v s = 14v; t j = 85 c 0.1 1 m a L9337md 3/8
electrical characteristics (continued) symbol parameter test conditions min. typ. max. unit timing (see fig. 1) t d,on on delay time v s = 14v, c ext = 0pf 10ma i o 200ma 2.5 3.5 m s t d,off off delay time 3 4.5 m s t set enable settling time 10 m s t d,diag on or off diagnostic delay time 10 m s s out output slopes 2.5 9 16 v/ m s v en v inhigh v inlow active t v prg v inhigh v inlow inverting mode t non-inverting mode v in v inhigh v inlow t v out 1/2v s t v s t set t d,off t d,on t d,off t d,on t d,off t d,on t set d95at150 no controlled output slope for enable low figure 1 L9337md 4/8
circuit description the L9337 is a triple low side driver for lines, lamps or inductive loads in automotive and indus- trial applications. all inputs are ttl or cmos compatible. this al- lows the device to be driven directly by a micro- controller. for the noise immunity, all inputs have a schmitt-trigger with a hysteresis of typ. 100mv. each input stage has an input voltage protection from -24v to 10v. the device can be activated with a high signal on enable input. enable low switches the device into the sleep mode. in this mode the quiescent current is less than 10 m a. a high signal on programming input changes the signal transfer polarity from noninverting into the inverting mode. normally this pin is connected to v s or gnd. these pins (prg and en) are inter- nally fixed at low status by open input condition. independent of the programming input, the output switches off, if the signal input pin is not connected. each output driver has a current limitation of min 0.4a and a seperate thermal shut-down. the ther- mal shut-down deactivates that output which ex- ceeds temperature switch off level. about 20k below this temperature threshold the output will be activated again. this means, that each output is able to sink continuously 285ma without acti- vating thermal shut-down at 85c ambient tem- perature (so20). the slew rate of the output is limited to max. 14v/ m s to reduce the electromag- netic interference, but not for the enable transfer characteristic (see fig. 1). an integrated active fly- back voltage limitation clamps the output voltage during the flyback phase of inductive loads to typ. 50v. the power dmos switches on, if the device is enabled and the output swings below ground. this protection avoids the activation of parasitics inside the power dmos. the diagnostic is an open drain output. the logic status depends on the programming pin. if the prg pin is low the diag output becomes low, if the device works correctly. at thermal shut-down of one channel, discon- nected ground or supply voltage the diagnostic output becomes high. if the prg pin is high this output is switched off at normal function and switched on at overtemperature. diagnostic table pins en prg in out diag normal function h l l l (on) l (on) h l h h (off) l (on) h h l h (off) h(off) hhhl (on)h(off) l x x h (off) h(off) overtemperature, disconnected ground or supply voltage h l x h (off) * h (off) overtemperature h h x h (off) * l (on) x = not relevant * selective for each channel at overtemperature L9337md 5/8
in out 1 out 2 out 3 in 1 in 2 in 3 gnd vs prg en diag adressdecoder a 0:8 d 0 d 1 d 2 d 3 8 vcc = 5v vcc gnd microcontroller int board voltage 14 v 2 w 12 mh 50 khz vcc gnd vcc = 5v 10 m f 240 w 50pf 10 m h figure 2: application circuit for inverting transfer polarity. L9337md 6/8
11 0 11 20 a e b d e l k h a1 c so20mec h x 45? so20 dim. mm inch min. typ. max. min. typ. max. a 2.35 2.65 0.093 0.104 a1 0.1 0.3 0.004 0.012 b 0.33 0.51 0.013 0.020 c 0.23 0.32 0.009 0.013 d 12.6 13 0.496 0.512 e 7.4 7.6 0.291 0.299 e 1.27 0.050 h 10 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 l 0.4 1.27 0.016 0.050 k 0? (min.)8? (max.) outline and mechanical data L9337md 7/8
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