july 2003 1/9 ? vb325sp high voltage ignition coil driver power i.c. n primary coil voltage internally set n coil current limit internally set n logic level compatible input n driving current quasi proportional to collector current n single flag-on coil current n low voltage clamp thermal shutdown description the vb325sp is a high voltage power integrated circuit made using the stmicroelectronics vipower? m1-3 technology, with vertical current flow power darlington and logic level compatible driving circuit. the enable pin allows to externally block the switch when the input is on. built-in protection circuit for coil current limiting and collector voltage clamping allows the device to be used as smart, high voltage, high current interface in advanced electronic ignition system. if the input signal from the micro happens to remain high, the device protects itself against over-heating by forcing collector current to smooth decrease (low voltage clamp feature) and no undesidered spark occurs (see figure 4). type v cl i cl i cc vb325sp 380v 10a 150ma block diagram powerso-10 ? 1 10 driver gnd reference r sense v cc hv c v in quasi prop. base current - thermal protection bd e diagnostic output v cc v r v f1 v lim v th sn limiter lgnd
2/9 vb325sp absolute maximum rating thermal data pin function (*) when grounded the input is enabled connection diagram (top view) symbol parameter value unit hv c collector voltage (internally limited) -0.3 to v clamp v i c collector current (internally limited) 10 a i c(gnd) dc current on emitter power 10.5 a v cc driving stage supply voltage -0.3 to 7 v i s driving circuitry supply current 200 ma i s(gnd) dc current on ground pin 1a v in input voltage -0.3 to v cc + 0.3 v i in maximum input current 100 ma f in logic input frequency in operative mode dc to 150 hz v out(flag) output voltage primary threshold current level -0.3 to v cc + 0.3 v i out(flag) flag output current 100 ma p max power dissipation (t c =25c) 125 w e s/b self clamped energy during output power clamping (see figure 2) 275 mj v esd esd voltage (hv c pin) 4kv v esd esd voltage (enable pin) + 1.5 ; -2 kv v esd esd voltage (other pins) 2kv i bd input darlington base current 150 ma v bd input darlington base voltage internally limited v t j operating junction temperature -40 to 150 c t stg storage temperature range -55 to 150 c v e maximum enable voltage -0.3 to 5.5 v i e maximum enable current 150 m a symbol parameter value unit r thj-case thermal resistance junction-case (max) 1 c/w r thj-amb thermal resistance junction-ambient (max) 51 c/w no name function 1 - 5 lgnd signal ground 2 - 3 - 4 gnd emitter power ground 6e enable (*) 7v cc logic supply voltage 8 bd base darlington 9 input logic input channel (internal pull down) 10 flag diagnostic output signal (open emitter) tab hv c primary coil output driver (open collector) 1 2 3 4 5 6 7 8 9 10 tab lgnd gnd gnd gnd lgnd e v cc bd input flag hv c pin 1 and pin 5 must be externally connected to pins 2 ? 4.
3/9 vb325sp electrical characteristics (5.3v < v bat < 24v; v cc =5v 10% ; -40oc < t j < 125oc; r coil =580m w; l coil =3.75mh unless otherwise specified; see note 1) note 1: parametric degratation are allowed with 5.324v. note 2: the primary coil current value i cl must be measured 1ms after desaturation of the power stage. note 3: no internal pull-down. note 4: if enable pin is floating out=off for every input status. (*) internally limited symbol parameter test conditions min typ max unit v cl high voltage clamp i coil =6.5a 320 380 420 v v lcl low voltage clamp i coil =6.5a; t j =t sd 30 40 50 v v ce(sat) power stage saturation voltage i c =6a; v in =4v 1.5 2 v i cc(stdby) stand-by supply current in=off 11 ma i cc dc logic current v b =16v; i c =6.5a; f=100hz; load = coil; v cc =5.5v 40 ma i cc(peak) peak dc logic current during on phase i c =6.5a 100 150 ma v cc dc logic voltage 4.5 5.5 v i cl coil current limit -40oc < t j < 125oc (see note 2) 9 11 a i c(off) output off state current in=off; v hvc =24v; v cc =5v; t j =25oc 5 ma v inh high level input voltage v cc =4.5v 4 v cc v v inl low level input voltage v cc =5.5v -0.3 0.8 v v in(hyst) input threshold hysteresis 0.4 v i inh high level input current v in =4v 100 m a i inl low level input current v in =0.8v 0 30 m a i inpd input active pull down v in =4v 10 100 m a v diagh high level flag output voltage r ext =22k w; c ext =1nf (see note 3) v cc - 1 v cc v v diagl low level flag output voltage r ext =22k w; c ext =1nf (see note 3) 0.5 v i diagth coil current level threshold t j =25oc 4.25 4.5 4.75 a i diagtd coil current level threshold drift (see figure 1) i diag high level flag output current i c > i diagth ; v diag =3v 0.5 ma i diag(leak) leakage current on flag output v in =low; v cc =5.5v 10 m a v f antiparallel diode forward voltage i c = -1a 2 v e s/b single pulse avalanche energy l=6mh; i c = 8a 180 mj t on turn-on time of coil current r c =0.5 w ; l c =3.75mh; t j =25oc; v bat =13v (see figure 6) 15 m s t off turn-off time of coil current r c =0.5 w ; l c =3.75mh; i c =6.5a; t j =25oc; v bat =13v (see figure 6) 15 25 m s t sd thermal shut-down intervention 150 oc v eh high level enable voltage v in =v inh ; out=off (see note 4) 2 v v el low level enable voltage v out free to follow v in 0.40 v
4/9 vb325sp electrical characteristics (continued) symbol parameter test conditions min typ max unit i eh high level enable current v e =5v 500 m a i el low level enable current v e <0.4v - 200 m a v bd(off) base darlington voltage off v e =v eh 1v v bd(on) base darlington voltage on v in =v inh ; v e =v el ; i c =6.5a 1.8 v principle of operation the vb325sp is mainly intended as a high voltage power switch device driven by a logic level input and interfaces directly to a high energy electronic ignition coil. the input v in of the vb325sp is fed from a low power signal generated by an external controller that determinesboth dwell time and ignition point. during vin high ( 3 4v) the vb325sp increases current in the coil to the desired, internally set current level. after reaching this level, the coil current remains constant until the ignition point, that corresponds to the transition of vin from high to low (typ. 1.9v threshold). during the coil current switch-off, the primary voltage hv c is clamped at an internally set value v cl , typically 380v. the transition from saturation to desaturation, coil current limiting phase, must have the ability to accomodate an overvoltage. a maximum overshoot of 20v is allowed. feedback when the collector current exceeds 4.5a, the feedback signal is turned high and it remains so, until the input voltage is turned-off. overvoltage the vb325sp can withstand the following transients of the battery line: -100v/2msec(r i =10 w ) +100v/0.2msec (r i =10 w ) +50v/400msec (r i = 4.2 w , with v in = 3v) figure 1: flag current vs. temperature figure 2: single pulse avalanche energy capability 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 0 102030405060708090100110 l (mh) e (mj) tc=25o c tc=150o
5/9 vb325sp figure 3: self clamped inductive switching current vs. time figure 5: typical application diagram figure 4: low voltage clamp feature m p 1nf 18k v cc hv c gnd flag v bat 1 m f 100nf e lgnd v in +5v bd 1k 1k 1k enable pin can be alternatively connected to lgnd 0 2 4 6 8 10 200 300 400 500 600 700 800 900 1000 time in clamp (sec) inductive current (a) t=25o t=150o
6/9 vb325sp figure 6: switching time for inductive load t t v gen v cc 3v v bat t on t off 100v r gen v gen d.u.t c e v bat
7/9 vb325sp dim. mm. inch min. typ max. min. typ. max. a 3.35 3.65 0.132 0.144 a (*) 3.4 3.6 0.134 0.142 a1 0.00 0.10 0.000 0.004 b 0.40 0.60 0.016 0.024 b (*) 0.37 0.53 0.014 0.021 c 0.35 0.55 0.013 0.022 c (*) 0.23 0.32 0.009 0.0126 d 9.40 9.60 0.370 0.378 d1 7.40 7.60 0.291 0.300 e 9.30 9.50 0.366 0.374 e2 7.20 7.60 0.283 300 e2 (*) 7.30 7.50 0.287 0.295 e4 5.90 6.10 0.232 0.240 e4 (*) 5.90 6.30 0.232 0.248 e 1.27 0.050 f 1.25 1.35 0.049 0.053 f (*) 1.20 1.40 0.047 0.055 h 13.80 14.40 0.543 0.567 h (*) 13.85 14.35 0.545 0.565 h 0.50 0.002 l 1.20 1.80 0.047 0.070 l (*) 0.80 1.10 0.031 0.043 a 0o 8o 0o 8o a (*) 2o 8o 2o 8o powerso-10 ? mechanical data (*) muar only poa p013p detail "a" plane seating a l a1 f a1 h a d d1 = = = = e4 0.10 a c a b b detail "a" seating plane e2 10 1 eb he 0.25 p095a
8/9 vb325sp powerso-10 ? suggested pad layout 1 tape and reel shipment (suffix 13tr) reel dimensions all dimensions are in mm. base q.ty 600 bulk q.ty 600 a (max) 330 b (min) 1.5 c ( 0.2) 13 f 20.2 g (+ 2 / -0) 24.4 n (min) 60 t (max) 30.4 tape dimensions according to electronic industries association (eia) standard 481 rev. a, feb 1986 all dimensions are in mm. tape width w 24 tape hole spacing p0 ( 0.1) 4 component spacing p 24 hole diameter d ( 0.1/-0) 1.5 hole diameter d1 (min) 1.5 hole position f ( 0.05) 11.5 compartment depth k (max) 6.5 hole spacing p1 ( 0.1) 2 top cover tape end start no components no components components 500mm min 500mm min empty components pockets saled with cover tape. user direction of feed 6.30 10.8 - 11 14.6 - 14.9 9.5 1 2 3 4 5 1.27 0.67 - 0.73 0. 54 - 0.6 10 9 8 7 6 b a c all dimensions are in mm. base q.ty bulk q.ty tube length ( 0.5) a b c ( 0.1) casablanca 50 1000 532 10.4 16.4 0.8 muar 50 1000 532 4.9 17.2 0.8 tube shipment (no suffix) c a b muar casablanca
9/9 vb325sp information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this p ublication 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 trademark of stmicroelectronics ? 2003 stmicroelectronics - printed in italy- all rights reserved. stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - u.s.a. http://www.st.com 1
|
