STMicroelectronics L9524C
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.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
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.