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.

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