VB325SP Integrated Circuit Chip HIGH VOLTAGE IGNITION COIL DRIVER POWER I.C.

VB325SP

HIGH VOLTAGE IGNITION COIL DRIVER POWER I.C.

■ 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

■ LOW VOLTAGE CLAMP THERMAL SHUTDOWN

DESCRIPTION

The VB325SP 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 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).

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