SGS Thomson Microelectronics VB923 Datasheet
®
HIGH VOLTAGE IGNITION COIL DRIVER
■ NO EXTERNAL COMPONENT REQUIRED
■ INTEGRATED HIGH VOLTAGE CLAMP
■ COIL CURRENT LIMIT INTERNALLY SE T
■ HIGH RUGGEDNES S
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.
VB923
POWER IC
3
2
1
TO-247
BLOCK DIAG RAM
October 1998
1/5
VB923
ABSOLUTE MAXIMUM RATING
Symbol Parameter Value Unit
HV
P
T
E
THERMAL DATA
Symbol Parameter Value Unit
R
thj-case
R
thj-amb
Collector Voltage Internally Limited V
c
Collector Current Internally Limited A
I
c
Input Current 40 mA
I
in
Total Dissipation at Tc = 25 oC 150 W
tot
Storage Temperature -40 to 150
stg
Operating Junction Temperature -40 to150
T
j
Avalanche Energy 350 mJ
s/b
Thermal Resistance Junction-case Max
Thermal Resistance Junction-ambient Max
0.83
30
o
o
o
C/W
o
C/W
C
C
ELECTRICAL CHARACTERISTICS (V
= 14 V, HEI Coil = xx, T
batt
= 25 oC
case
unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
I
cgo
V
V
cg(sat)
I
cl
V
f
V
inCL
V
inTH
t
d(off)
* ICL is measured 1ms after the maximum peak
** Pulsed: Pulse duration = 300 µs, duty cycle 1.5 %
Note 1: After adjusting input signal (frequency and duty) to be I
Note 2: The device is biased with 14V on collector with respectt o emitte r. Then a voltage ramp (0 to 5V) is put on input. V
voltage when the device is in on-stat e with I
Collector Cut-off
Vin = 0 HVc = 200 V 250 µA
Current
Clamping Voltage -40 < Tj < 125 oC Ic = 5 A 350 400 500 V
cl
Power Stage
Ic = 5 A Vin = 4 V 2 2.5 V
Saturation Voltage
* Coil Current Limit
-30 ≤ T
≤ 50 oC
j
6.0 6.6 7.2 A
** Diode Forward Voltage If = 10 A 3.5 V
Input Voltage During
On State
Threshold Input
Voltage
-30 ≤ T
I
-30 ≤ T
≤ 120 oC Ic = 5 A
j
= 10 mA see note 1
in
≤ 120 oC Ic = 5 A
j
see note 2
0.5 4 V
4V
Switching Time Ic = 3 A L = 6 mH (see fig.1) 15 40 µs
= 5A, Vin (Tr ON) should be measured.
C
C
=5A
is the input
inTH
2/5
Loading...