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(R)
VB025BSP
HIGH VOLTAGE IGNITION COIL DRIVER POWER IC
TYPE VB025BSP
s s s s
V cl 380 V
I cl 9A
Id 100 mA
s
PRIMARY COIL VOLTAGE INTERNALLY SET COIL CURRENT LIMIT INTERNALLY SET LOGIC LEVEL COMPATIBLE INPUT DRIVING CURRENT QUASI PROPORTIONAL TO COLLECTOR CURRENT SINGLE FLAG-ON COIL CURRENT
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1
DESCRIPTION The VB025BSP is a high voltage power integrated circuit made using STMicroelectronics VIPower Technology, with vertical current flow power darlington and logic level compatible driving circuit. Built-in protection circuits for coil current limiting and collector voltage clamping allows the VB025BSP to be used as a smart, high voltage, high current interface in advanced electronic ignition systems. BLOCK DIAGRAM
PowerSO-10
March 1999
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VB025BSP
ABSOLUTE MAXIMUM RATING
Symb ol HV C IC I C(gn d) VCC Is I s(gnd ) Vi n I in f in V out(fl ag) I out(f lag) P max E s/ b V ESD V ESD I BD V BD Tj T s tg Parameter Collector Voltage (Internally Limited) Collector Current (Internally Limited) DC Current on Emitter Power Driving Stage Supply Voltage Driving Circuitry Supply Current DC Current on Ground Pin Input Voltage Maximum Input Current Logic Input Frequency in O perative Mode Output Voltage Primary Threshold Current Level Flag Output Current Power Dissipation (TC = 105 C) Clamped Energy During Output Power Clamping ESD Voltage (HVC Pin) ESD Voltage (O ther Pins) Input Darlington Base Current Input Darlington Base Voltage Operating Junction Temperature Storage Temperature Range
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Value -0.3 to Vcl amp 10 10.5 () -0.3 to 7 200 1 -0.3 to VCC + 0.3 100 DC to 150 -0.3 to VCC + 0.3 100 T BD 300 4 2 150 Internally Limited -40 to 150 -55 to 150
Unit V A A V mA A V mA Hz V mA W mJ KV KV mA V
o o
C C
() With 10 mils Al wire
THERMAL DATA
R t hj-ca se R thj-h T sold Thermal Resistance Junct ion Case Thermal Resistance Junct ion Heatsink with FR4 Lead T emperature During Soldering
st
(MAX) (MAX) (MAX)
1.2 T BD (@) T BD (@)
o o
C/W C/W
o
C
(@) see application note AN515/1094 on VIPower data-book 1 edition.
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VB025BSP
CONNECTION DIAGRAM
PIN FUNCTION
No 1-5 6 7 8 9 10 TAB NAME GND GND V CC BD INPUT FLAG HVC Emitter Power Ground Control G round (*) Logic Supply Voltage Base Darlington Logic Input Channel (Internal Pull Down) Diagnostic Output Signal (Open Emitter) Primary Coil Output Driver (Open Collector) F UNCTIO N
(*) Pin 6 must be connected to pins 1-5 externally
ELECTRICAL CHARACTERISTICS (5.3V < Vb < 24V; VCC = 5 V 10%; -40oC < Tj < 125oC; Rcoil = 580 m; Lcoil = 3.75 mH; unless otherwise specified; see note 1)
Symbol V cl V ce (sat) I CC( st dby) I CC I CC(pea k) V CC Ic l I C(l eak) I C(inf l) T Ic_ctr V inH V in L Parameter High Voltage Clamp Saturation Voltage of The Power Stage St and-by Supply Current DC Logic Current Peak DC Logic Current During On Phase DC Logic Voltage Coil Current Limit Output leakage Current Collector Current with Floating Input Thermal Temperature Output Current Control High Level Input Voltage Low Level Input Voltage -40 oC < Tj < 125 o C (see note 2 and figure 1) IN = OF F V CC = 5 V R LOAD = 1K; OUT = ON V CC = 4.5V V CC = 5.5V V HVC = 24V VBat = 13.5 V Input Floating (see figure 2) 150 4 -0.3 Test Cond itions I coil = 6.5 A I c = 7.5A; IN = OF F V b = 16 V I c = 6.5 A f = 100 Hz Load = Coil V CC = 5.5V I c = 7.5 A (see figure 1) 4.5 9 V in = 4V Min. 320 Typ. 380 Max. 420 TBD 10 40 TBD 5.5 11 0.8 0.8 (*) V CC 0.8 Un it V V mA mA mA V A mA mA
o
C
V V 3/7
VB025BSP
ELECTRICAL CHARACTERISTICS (continued)
Symbol Vi n(h ys ) Iin H I inL Iin pd V di agH V di agL Id iagTH Id iagTD Id iag I dia g(l eak) VF E s/ b t pHL t pLH Parameter Input Threshold Hysteresis High Level Input Current Low Level Input Current Input Active Pull-Down High Level Flag O utput Voltage Low Level Flag O utput Voltage Coil Current Level Threshold Coil Current Level Threshold Drift High Level Flag O utput Current Leakage Current O n Flag Output Antiparallel Diode Forward Voltage Single Pulse Avalanche Energy Turn-on Delay Time of Coil Current Turn-off Delay Time of Coil Current V in = 4 V V in = 0.8 V V in = 4 V R EXT = 22 K (see note 3) R EXT = 22 K (see note 3) T j = 25o C (see figure 3) I C > I diagTH V in = LO W I c = -1 A L = 6 mH IC = 8 A (see figure 4) R c = 0.5 L c = 3.75 mH (see figure 5) R c = 0.5 L c = 3.75 mH Ic =6.5A (see figure 5) 180 T BD T BD V diag = 3 V V CC = 5.5V 0.5 T BD 10 2 mA A V mJ s s C EXT = 1 nF C EXT = 1 nF (see figure 1) 4.25 4.5 10 V CC -1 Test Cond itions Min. 0.4 100 -100 100 V CC 0.5 4.75 Typ. Max. Un it V A A A V V A
Note 1: Parametric degradation are allowed with 5.3 < Vb < 10V and Vb > 24V. Note 2: The primary coil current value Icl must be measured 1ms after desaturation of the power stage. Note 3: No Internal Pull-Down (*) Internally limited
PRINCIPLE OF OPERATION The VB025BSP 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 Vin of the VB025BSP is fed from a low power signal generated by an external controller that determines both dwell time and ignition point. During Vin high ( 4V) the VB025BSP 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
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voltage HVc is clamped at an internally set value Vcl, 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 VB025BSP can withstand the following transients of the battery line: -100V/2msec (Ri = 10 ) +100V/0.2msec (Ri = 10 ) +50V/400msec (Ri = 4.2 , with VIN = 3 V)
VB025BSP
Fig. 1 Main Waveforms During On Phase Fig. 2 Output Current Waveform After Thermal Protection Activation
Fig. 3 Flag Current Versus Temperature
FIG. 4 Single Pulse Typical Es/b Curve
FIG. 5 Propagation Times Definitions.
200 V
50 %
HVC
10 % INPUT 10 % tpHL t pLH
SC10930
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VB025BSP
PowerSO-10 MECHANICAL DATA
DIM. MIN. A A1 B c D D1 E E1 E2 E3 E4 e F H h L q 0
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mm TYP. MAX. 3.65 0.10 0.60 0.55 9.60 7.60 9.50 7.40 7.60 6.35 6.10 1.27 1.25 13.80 0.50 1.20 1.70 8o 1.80 0.047 1.35 14.40 0.049 0.543 MIN. 0.132 0.000 0.016 0.013 0.370 0.291 0.366 0.283 0.283 0.240 0.232 3.35 0.00 0.40 0.35 9.40 7.40 9.30 7.20 7.20 6.10 5.90
inch TYP. MAX. 0.144 0.004 0.024 0.022 0.378 0.300 0.374 0.291 0.300 0.250 0.240 0.050 0.053 0.567 0.002 0.071 0.067
B
0.10 A B
10 = H = A F A1 =
6
=
=
=
E = 1 5 e
0.25
M
=
E2
E3
E1
E4
=
=
A
=
SEATING PLANE DETAIL "A" Q
B
C
h
D = D1 = = = SEATING PLANE
= A1 L
DETAIL "A"
0068039-C
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VB025BSP
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences 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 publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a trademark of STMicroelectronics (c) 1999 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com .
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