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. The 33879 incorporates SMARTMOS technology, with CMOS logic, bipolar/MOS analog circuitry, and DMOS power MOSFETs. The 33879 controls various inductive, incandescent, or LED loads by directly interfacing with a microcontroller. The circuit’s innovative monitoring and protection features include very low standby currents, cascade fault reporting, internal + 45 V clamp voltage for low-side configuration, - 20 V high-side configuration, output specific diagnostics, and independent overtemperature protection.

Features

•Designed to operate 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 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

•Independent overtemperature protection

Applications

•Solenoids

•Relays

•Actuators

•Stepper motors

•Brush DC motors

•Incandescent lamps

MC33879属于集成电路（IC） > 全半桥驱动器。恩智浦半导体公司制造生产的MC33879全半桥驱动器器件属于电桥驱动器电源管理集成电路 (PMIC) 系列，包含两个或多个功率晶体管，以及在外部器件控制下将其用作开关所需的电路。这些晶体管通常在内部配置为成对串联连接（称为半桥），因而任意指定晶体管对之间的结点都可以连接至两个电源轨中的任一个。这类器件常用于将控制器件（如微控制器）提供的低电平信号转换为操作执行器（如步进电机或无刷电机）所需的较大功率信号。