L9524C Datasheet, PDF (1/27 Pages) STMicroelectronics – Glow plug system control IC

L9524C
Glow plug system control IC
Features
■ Quad gate driver for external N-channel Power
MOSFETs in high-side configuration:
– Gates driven by PWM output signal
– Adjustable gate charge/discharge currents
– Limited gate-to-source voltages
– Negative clamping for inductive loads
– Advanced run-off control
– Regulation of the power through the glow
plugs
■ Control output for external relay driver
■ Battery-voltage-compatible two-wire interface
■ Supply voltage monitoring with shutdown
■ Battery voltage monitoring with shutdown
■ Junction temperature monitoring with
shutdown
■ Monitoring of currents through the glow plugs
with shutdown at overcurrent (adjustable
threshold)
■ Monitoring of external switches
■ Charge pump voltage monitoring with
shutdown
■ Active clamping during load dump
SO24
Description
The L9524C is a control IC for up to six glow
plugs of diesel engines. The glow plugs are
switched by up to four external PWM-controlled
N-channel Power MOSFETs or a single relay in
high-side configuration.
Supply voltage, battery voltage, junction
temperature, switches, currents through the glow
plugs, and charge pump voltage are monitored.
A two-wire interface is used to communicate with
the diesel engine management system.
Table 1. Device summary
Order code
L9524C
L9524C-TR
Package
SO24
SO24
Packing
Tube
Tape and reel
January 2008
Rev 3
1/27
www.st.com
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