L9524C

www.DataSheet4U.com 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 nchannel 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. ■ ■ ■ Order codes Part number L9524C-TR Package SO24 Packing Tape & reel September 2006 Rev 1 1/27 www.st.com 1 DataSheet 4 U .com www.DataSheet4U.com Contents L9524C Contents 1 2 3 Block diagram . . . . . . . . . . . . . . . ....