MC33879
Overview
The 33879 device is an 8-output hardware configurable, high-side/low-side switch with 16-bit serial input control using the Serial Peripheral Interface (SPI). Two of the outputs may be controlled directly via a microcontroller for pulse-width modulation (PWM) applications.
- Designed to operate at 5.5 V < VPWR < 27.5 V
- 16-bit SPI for control and fault reporting, 3.3 V / 5.0 V compatible
- Outputs are current limited (0.6 A to 1.2 A) to drive incandescent lamps
- Output voltage clamp, + 45 V (low side) and -20 V (high side) during inductive switching
- On/Off control of open load detect current (LED application)
- Internal reverse battery protection on VPWR
- Loss of ground or supply will not energize loads or damage IC
- Maximum 5.0 µA IPWR standby current at 13 V VPWR
- RDS(ON) of 0.75 Ω at 25 °C typical
- Short-circuit detect and current limit with automatic retry
