VB326 Datasheet, PDF (1/9 Pages) STMicroelectronics – HIGH VOLTAGE IGNITION COIL DRIVER POWER I.C

®
VB326SP
HIGH VOLTAGE IGNITION COIL DRIVER
POWER I.C.
TYPE
VB326SP
V_cl
360V
I_cl
I_CC
10A
150mA
s PRIMARY COIL VOLTAGE INTERNALLY SET
s COIL CURRENT LIMIT INTERNALLY SET
s LOGIC LEVEL COMPATIBLE INPUT
s DRIVING CURRENT QUASI PROPORTIONAL
TO COLLECTOR CURRENT
s SINGLE FLAG-ON COIL CURRENT
s LOW VOLTAGE CLAMP THERMAL
SHUTDOWN
10
1
PowerSO-10™
DESCRIPTION
The VB326SP 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
BLOCK DIAGRAM
V_CC
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).
BD
HV_C
V_IN
DRIVER
QUASI PROP.
BASE CURRENT
DIAGNOSTIC
OUTPUT
LIMITER
V_CC
V_F1
V_R
-
REFERENCE
V_LIM
V_TH
THERMAL
PROTECTION
R_SENSE
SN
E
November 2003
LGND
GND
1/9