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October 2003

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WIDE SUPPLY VOLTAGE RANGE: 8 TO 35V

DC

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BUILD-IN GATE DRIVE VOLTAGE CLAMP

TYP. 11V

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LOGIC CONTROLLED ENABLING CIRCUIT

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DIGITAL IN-RUSH TIMER

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BUILT-IN POWER-ON RESET

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INTERNALLY TRIMMED TIMING

OSCILLATOR

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NO EXTERNALLY TIMING CAPACITORS

NEEDED

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FIXED IN-RUSH/HOLD CURRENT RATIO

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LOW DROP CURRENT SENSING

RESISTOR

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INTEGRATED FILTER IN THE FEEDBACK

LOOP (TIME COSTANT OF 2µs TYP.)

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SO-8 PACKAGE

DESCRIPTION

This circuit is basically switch mode current

regulator with 2 modes (In-rush and Holding).

In-rush current occurs in the first 64 ms of each

on/off cycle with the rise time dependent on the

coil’s resistance and inductance. The Hold-current

is a partition of the In-rush current fixed by the

for enabling and disabling the gate control output

for the external power MOS. The MOS transistor

must be chosen according to the supply voltage

range and

the current flowing

through the

solenoid.

ORDERING CODES

Type

Temperature

Range

Package

Comments

STM802BD

-40 to 85 °C

SO-8 (Tube)

100 parts per tube / 20 parts per box

STM802BDR

-40 to 85 °C

SO-8 (Tape & Reel)

2500 parts per reel

STM802

SOLENOID CONTROLLER IC

SO-8