MC33814
Overview
- Operates over supply voltage range of 4.5 V < VPWR < 36 V
- Start-up/shutdown control and power sequence logic with KEYSW input
- MCU supply: VCC is a 5.0 V (±2.0 %, 200 mA) regulated supply
- Sensor supply: VPROT (100 mA) is a VCC tracking protected sensor supply
- Three configurable pre-drivers for IGBT or general purpose gate MOSFETs for ignition and O2 sensor (HEGO) heater:
- Overcurrent shutdown
- Short-to-battery shutdown
- Six low-side drivers with full diagnostics, self-protection and PWM control:
- Two fuel injector drivers, RDS(on) = 0.6 Ω, ILIMIT = 1.8 A, to drive typical 12 Ω high-impedance injectors
- Relay 1 driver, RDS(on) = 0.4 Ω, ILIMIT = 3.0 A, to drive fuel pump
