VB923
HIGH VOLTAGE IGNITION COIL DRIVER
POWER IC
s
NO EXTERNAL COMPONENT REQUIRED
s
INTEGRATED HIGH VOLTAGE CLAMP
s
COIL CURRENT LIMIT INTERNALLY SET
s
HIGH RUGGEDNESS
DESCRIPTION
The VB923 is a monolithic high voltage integrated
circuits made using STMicroelectronics VIPower
Technology, which combines a vertical current
flow power trilinton with a coil current limiting
circuit and a collector voltage clamping.
The device is peculiarly suitable for application in
high performance electronic car ignition, where
coil current limitation and voltage clamping are
required.
October 1998
BLOCK DIAGRAM
1
2
3
TO-247
1/5
ABSOLUTE MAXIMUM RATING
Symbol
Parameter
Value
Unit
HV
c
Collector Voltage
Internally Limited
V
I
c
Collector Current
Internally Limited
A
I
in
Input Current
40
mA
P
to t
Total Dissipation at T
c
= 25
o
C
150
W
T
stg
Storage Temperature
-40 to 150
o
C
T
j
Operating Junction Temperature
-40 to150
o
C
E
s/b
Avalanche Energy
350
mJ
THERMAL DATA
Symbol
Parameter
Value
Unit
R
thj-case
R
thj-amb
Thermal Resistance Junction-case Max
Thermal Resistance Junction-ambient Max
0.83
30
o
C/W
o
C/W
ELECTRICAL CHARACTERISTICS (V
batt
= 14 V, HEI Coil = xx, T
case
= 25
o
C
unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
cgo
Collector Cut-off
Current
V
in
= 0 HV
c
= 200 V
250
A
V
cl
Clamping Voltage
-40 < T
j
< 125
o
C I
c
= 5 A
350
400
500
V
V
cg(sat )
Power Stage
Saturation Voltage
I
c
= 5 A V
in
= 4 V
2
2.5
V
I
cl
*
Coil Current Limit
-30
T
j
50
o
C
6.0
6.6
7.2
A
V
f
**
Diode Forward Voltage
I
f
= 10 A
3.5
V
V
inCL
Input Voltage During
On State
-30
T
j
120
o
C I
c
= 5 A
I
in
= 10 mA see note 1
4
V
V
inTH
Threshold Input
Voltage
-30
T
j
120
o
C I
c
= 5 A
see note 2
0.5
4
V
t
d(off)
Switching Time
I
c
= 3 A L = 6 mH (see fig.1)
15
40
s
* I
CL
is measured 1ms after the maximum peak
** Pulsed: Pulse duration = 300
s, duty cycle 1.5 %
Note 1: After adjusting input signal (frequency and duty) to be I
C
= 5A, V
in
(Tr ON) should be measured.
Note 2: The device is biased with 14V on collector with respectto emitter. Then a voltage ramp (0 to 5V) is put on input. V
inTH
is the input
voltage when the device is in on-state with I
C
=5A
VB923
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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 registered trademark of STMicroelectronics
1998 STMicroelectronics Printed in Italy All Rights Reserved
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VB923
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