l6370 2.5a high-side driver industrial intelligent power switch 2.5a output current 9.5v to 35v supply voltage range internal current limiting thermal shutdown open ground protection internal negative voltage clamping to v s - 50v for fast demagnetization differential inputs with large com- mon mode range and threshold hysteresis undervoltage lockout with hysteresis open load detection two diagnostic outputs output status led driver non dissipative short circuit pro- tection protection against and surge tran- sient (iec 801-5) immunity against burst transient (iec 801-4) esd protection (human body model 2kv) description the l6370 is a monolithic intelligent power switch in multipower bcd technology, for driving inductive or resistive loads. an internal clamping diode enables the fast demagnetization of induc- tive loads. diagnostic for cpu feedback and ex- tensive use of electrical protections make this de- vice extremely rugged and specially suitable for industrial automation applications. august 2003 ? ordering numbers: l6370l (multiwatt11) l6370d (powerso20) under voltage charge pump driver non dissipative short circuit current limitation open load detection outstatus diagnostic thermal protection osc + - 1.4v input in+ in- on-delay output status 3ma diag2 diag1 out v s d95in208d rsc block diagram multipower bcd technology powerso20 multiwatt11 (in line) 1/10
pin connection (top view) absolute maximum ratings (pin numbering referred to multiwatt package) symbol parameter value unit v s supply voltage (pin 10) (t w < 10ms) 50 v v s C v o supply to output differential voltage. see also v cl (pins 10 - 9) internally limited v v od externally forced voltage (pin7) -0.3 to 7 v i od externally forced voltage (pin7) +1 ma v i input voltage (pins 3/4) -10 to v s +10 v v i differential input voltage (pins 3 - 4) 43 v i i input current (pins 3/4) 20 ma i o output current (pin 9). see also isc (pin 9) internally limited a p tot power dissipation. see also thermal characteristics. internally limited w t op operating temperature range (t amb ) -25 to +85 c t stg storage temperature -55 to 150 c e i energy induct. load t j = 85 c1j thermal data symbol description multiwatt powerso20 unit r th j-case thermal resistance junction-case max. 1.5 1.5 c/w r th j-amb thermal resistance junction-ambient max. 35 C c/w 1 2 3 4 5 6 7 9 10 11 8 output supply voltage output rsc on-delay gnd output status input - input + diagnostic 2 diagnostic 1 d95in209a gnd output output n.c. supply voltage n.c. supply voltage output output n.c. rsc diagnostic 1 on-delay diagnostic 2 input + input - output status gnd 1 3 2 4 5 6 7 8 9 18 17 16 15 14 12 13 11 19 10 20 gnd gnd d95in210b note: output pins must be must be connected externally to the package to use all leads for the output current (pin 9 and 11 for mu ltiwatt package, pin 2, 3, 8 and 9 for powerso20 package). l6370 2/10
electrical characteristics (v s = 24v; t j = C25 to +125c, unless otherwise specified) symbol parameter test condition min. typ. max. unit v smin supply voltage for valid diagnostics i diag > 0.5ma ; v dg1 = 1.5v 4 35 v v s supply voltage (operative) 9.5 24 35 v i q quiescent current i out = i os = 0 v il v ih 0.8 3 1.4 5 ma ma v sth1 undervoltage threshold 1 (see fig. 1), tamb = 0 to +85 c8.599.5v v sth2 undervoltage threshold 2 8 8.5 9 v v shys supply voltage hysteresis 300 500 700 mv i sc short circuit current v s = 9.5 to 35v; r l = 2 w 5k w < r sc < 30k w 15/r sc (k w )a 0 < r sc < 5k w 2.6 3.2 4 a v don output voltage drop i out = 2.0a t j = 25 c t j = 125 c i out = 2.5a t j = 25 c t j = 125 c 200 320 250 400 280 440 350 550 mv mv mv mv i oslk output leakage current v i = v il ; v o = 0v 500 m a v ol low state out voltage v i = v il ; r l = 0.8 1.5 v v cl internal voltage clamp (v s - v o )i o = 1a single pulsed: tp = 300 m s 48 53 58 v i old open load detection current v i = v ih ; t amb = 0 to +85 c 136ma v id common mode input voltage range (operative) v s = 18 to 35v C7 15 v i ib input bias current v i = C7 to 15v; Cin = 0v C250 250 m a v ith input threshold voltage v+in > vCin 0.8 1.4 2 v v iths input threshold hysteresis voltage v+in > vCin 50 400 mv r id diff. input resistance 0 < +in < +16v ; Cin = 0v C7 < +in < 0v ; Cin = 0v 400 150 k w k w i ilk input offset current v+in = vCin +ii 0v < v i <5.5v Cii C20 C75 C25 +20 m a m a Cin = gnd +ii 0v < v+in <5.5v Cii C250 +10 C125 +50 m a m a +in = gnd +ii 0v < vCin <5.5v Cii C100 C50 C30 C15 m a m a n. name function 1 diag1 diagnostic 1 output. this open drain reports the ic working conditions. (see diagnostic truth table) 2 diag1 diagnostic 2 output. this open drain reports the ic working conditions. (see diagnostic truth table) 3 in - comparator non inverting input 4 in+ comparator inverting input 5 outstatus this current source output is capable of driving a led to signal the status of the output pin. the pin is active (source current) when the output pin is considered high (see fig 1) 6 gnd ground 7 on-delay programmable on time interval duration during short circuit operation 8 rsc current limitation setting. 9 output high side output with built-in current limitation 10 v s supply volatge input, the value of the supply voltage is monitored to detect under voltage condition 11 output high side output with built-in current limitation pin function (pin numbering referred to multiwatt package) l6370 3/10
electrical characteristics (continued) symbol parameter test condition min. typ. max. unit v oth1 output status threshold 1 voltage (see fig. 1) 4.5 5 5.5 v v oth2 output status threshold 2 voltage (see fig. 1) 4 4.5 5.0 v v ohys output status threshold hysteresis (see fig. 1) 300 500 700 mv i osd output status source current v out > v oth1 ; v os = 2.5v 2 4 ma v osd active output status driver drop voltage vs C v os ; i os = 2ma t amb = 0 to +85 c 1.5 3 v i oslk output status driver leakage current v out < v oth2 ; v os = 0v v s = 9.5 to 35v 25 m a v dgl diagnostic drop voltage d1 / d2 = l ; i diag = 0.5ma d1 / d2 = l ; i diag = 3ma 40 250 mv mv i dglk diagnostic leakage current d1 / d2 =h ; 0 < vdg < v s v s = 9.5 to 35v 5 m a source drain ndmos diode v fsd forward on voltage @ i fsd = 2.5a 1 1.5 v i fp forward peak current t = 10ms; d = 20% 6 a t rr reverse recovery time i f = 2.5a di/dt = 25a/ m s 200 ns t fr forward recovery time 100 ns thermal characteristics q lim junction temp. protect. 135 150 c q t h thermal hysteresis 20 c note v il < 0.8v, v ih > 2v @ (v+in > vCin) ac operation (pin numbering referred to multiwatt package) symbol pin parameter test condition min. typ. max. unit t r - t f 9 vs 4 rise or fall time v s = 24v; r i = 70 w ; r l to ground 20 m s t d 9 vs 3 delay time 5 m s dv/dt 9, 11 slew rate (rise and fall edge) 0.7 1 1.5 v/ m s t on 7 on time during short circuit condition 50pf 50% 50% t d t d t 90% 90% 10% 10% t f t r t v in v out d94in127a 50% 50% figure 3: switching waveforms diagnostic truth table diagnostic conditions input output diag1 diag2 normal operation l h l h h h h h open load condition (i o < i old )l h l h h l h h short to v s l h h h l l h h short circuit to ground (i o = i sc ) (**) (pin on-delay grounded) h h (*) l h h h h output dmos open l h l l h l h h overtemperature l h l l h h l l supply undervoltage (v s < v sth2 )l h l l l l l l (*) according to the intervention of the current limiting block. (**) a cold lamp filament, or a capacitive load may activate the current limiting circuit of the ips, when the ips is initial ly turned on. v s d95in212 v oth2 v shys v oth1 figure 2: undervoltage comparator hysteresis l6370 5/10
input section the input section is an high impedance differen- tial stage with high common and differential mode range. theres built-in offset of +1.4v (typical value) and an hysteresis of 400mv (maximum value), to ensure high noise immunity. diagnostic logic the operating conditions of the device are perma- nently monitored and the following occurences are signalled via the diag1/diag2 open-drain output pins: -short circuit versus ground. a current limiting circuit fixes at isc = 3.2a (typical value) the maximum current that can be sourced from the output pin (for more details see short circuit operation section). - short circuit versus vs. - under voltage(uv) - over temperature (ovt) - open load, if the output current is less than 3ma (typical value). - output dmos open according to the diagnostic truth table: short circuit operation in order to minimise the power dissipation when the output is shorted to grounded, an innovative, non dissipative short cicuit protection (patent pending) is implemented, avoiding, thus the inter- vention of the thermal protection in most cases. whenever the output is shorted to ground, or, generally speaking, an over current is sinked by the load, the output devices is driven in linear mode, sourcing the isc current (typically 3.2a) for a time interval (t on ) defined by means of the exter- nal c on capacitor connected between the on- delay pin and gnd. whether the short circuit crease within the t on interval the diag2 output status is not affected, acting as a programmable diagnostic delay. this function allow the device to drive a capaci- tive load or a filament lamp (that exhibits a very low resistance during the initial heading phase) without the intervention of the diagnostic. if the short circuit lasts for the whole t on interval, the output dmos is switched off and the diag2 goes low, for a time interval t off lasting 64 times t on . at the end of the t off interval if the short circuit condition is still present, the output dmos is turned on (and the diag2 goes high - see fig4) for another t on interval and the sequence starts again, or, whether not, the normal condition op- eration is resumed. the t on interval can be set to lasts between 64 m s and 2.56ms for a c on capacitor value ranging be- tween 50pf and 2nf to have: t on ( m s) = 1.28 c on (pf) if the on-delay pin is grounded the non dissipa- tive short circuit protection is disabled, and the isc current is delivered until the overtemperature protection shuts the device off. the behaviour of the diag2 output is, in this situation, showed in the diagnostic truth table. overtemperature protection (ovt) if the chip temperature exceeds q lim (measured in a central position in the chip) the chip deactivates itself. the following actions are taken: all the output stage is switched off; the signal diag2 is activated (active low). normal operation is resumed as soon as (typically after some seconds) the chip temperature moni- tored goes back below q lim - q h . the different thresholds with hysteretic behavior assure that no intermittent conditions can be gen- erated. undervoltage protection (uv) the supply voltage is expected to range from 9.5v to 35v, even if its reference value is consid- ered to be 24v. in this range the device operates correctly. below 9.5v the overall system has to be consid- ered not reliable. protection will thus shut off the output whenever the supply voltage falls below the mask fixed by the v sth1 (9v typ.) and v sth2 (8.5v typ.). the hysteresis (see fig. 2) ensures a non intermit- tent behavior at low supply voltage with a super- imposed ripple. the under voltage status is signalled via the diag1 and diag2 outputs (see the diagnostic truth table) . demagnetization of inductive loads an internal zener diode, limiting the voltage across the power mos to between 50 and 60v (v cl ), provides safe and fast demagnetization of inductive loads without external clamping devices. the maximum energy that can be absorbed from an inductive load is specified as 1j (at tj = 85 c) (see figure 2) l6370 6/10
50v l +v s i s v s rl i o output d95in215a figure 5: inductive load equivalent circuit output current t on t on t off t off time t multiwatt11 (in-line) dim. mm inch min. typ. max. min. typ. max. a 5 0.197 b 2.65 0.104 c 1.6 0.063 e 0.49 0.55 0.019 0.022 f 0.88 0.95 0.035 0.037 g 1.57 1.7 1.83 0.062 0.067 0.072 g1 16.87 17 17.13 0.664 0.669 0.674 h1 19.6 0.772 h2 20.2 0.795 l 26.4 26.9 1.039 1.059 l1 22.35 22.85 0.880 0.900 l3 17.25 17.5 17.75 0.679 0.689 0.699 l4 10.3 10.7 10.9 0.406 0.421 0.429 l7 2.65 2.9 0.104 0.114 s 1.9 2.6 0.075 0.102 s1 1.9 2.6 0.075 0.102 dia1 3.65 3.85 0.144 0.152 outline and mechanical data l6370 8/10
outline and mechanical data e a2 a e a1 pso20mec detail a t d 110 11 20 e1 e2 h x 45 detail a lead slug a3 s gage plane 0.35 l detail b r detail b (coplanarity) gc - c - seating plane e3 b c n n h bottom view e3 d1 dim. mm inch min. typ. max. min. typ. max. a 3.6 0.142 a1 0.1 0.3 0.004 0.012 a2 3.3 0.130 a3 0 0.1 0.000 0.004 b 0.4 0.53 0.016 0.021 c 0.23 0.32 0.009 0.013 d (1) 15.8 16 0.622 0.630 d1 9.4 9.8 0.370 0.386 e 13.9 14.5 0.547 0.570 e 1.27 0.050 e3 11.43 0.450 e1 (1) 10.9 11.1 0.429 0.437 e2 2.9 0.114 e3 5.8 6.2 0.228 0.244 g 0 0.1 0.000 0.004 h 15.5 15.9 0.610 0.626 h 1.1 0.043 l 0.8 1.1 0.031 0.043 n 8? (typ.) s 8? (max.) t 10 0.394 (1) d and e1 do not include mold flash or protusions. - mold flash or protusions shall not exceed 0.15mm (0.006) - critical dimensions: e, g and a3. powerso20 0056635 jedec mo-166 weight: 1.9gr l6370 9/10
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsib ility for the cons equences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specification mentioned in this pu blication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectron ics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicr oelectronics. the st logo is a registered trademark of stmicroelectronics ? 2003 stmicroelectronics C printed in italy C all rights reserved multiwatt? is a registered trademark of sgs-thomson microelectronics powerso20 ? is a trademark of sgs-thomson microelectronics stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco - singapore - spain - sweden - switzerland - united kingdom - united states. http://www.st.com l6370 10/10
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