VB024

HIGH VOLTAGE IGNITION COIL DRIVER

POWER IC

s

PRIMARY COIL CURRENT INTERNALLY SET

s

PRIMARY COIL VOLTAGE INTERNALLY SET

s

AUTOMATIC SHUT-OFF AT MAX CURRENT

s

LOGIC LEVEL COMPATIBLE INPUT

s

DIGITAL SIGNAL FEEDBACK TO INDICATE

A PREDETERMINED CURRENT LEVEL

DESCRIPTION

The VB024 is a high voltage integrated circuit

made using SGS-THOMSON VIPower thecnology,

with vertical current flow power darlington and logic

level compatible driving circuit.

The device performs the following functions:

power stage for driving the primary side of the

ignition coil, digital signal feedback to the control

IC to indicate a predetermined current level,

automatic shut-off at maximum current, self

clamping for voltage flyback and logic level input.

September 1993

BLOCK DIAGRAM

ISOWATT7

TYPE

VB024

400 V

8 A

100 mA

1/8