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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 interfacein 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).

PRIMARY COIL VOLTAGE INTERNALLY SET

COIL CURRENT LIMIT INTERNALLY SET

LOGIC LEVEL COMPATIBLE INPUT

DRIVING CURRENT QUASI PROPORTIONAL TO COLLECTOR CURRENT

LOW VOLTAGE CLAMP THERMAL SHUTDOWN