The 22XS4200 device is part of a 24 V dual high-side switch product family with integrated control, and a high number of protective and diagnostic functions. It is designed for truck and bus applications. The low RDS(on) channels (<22 mΩ) can control different load types; bulbs, solenoids, or DC motors. Control, device configuration, and diagnostics are performed through a 16-bit serial peripheral interface (SPI), allowing easy integration into existing applications. This device is powered by SMARTMOS technology.

Both channels can be controlled individually by external/internal clock signals, or by direct inputs. Using the internal clock allows fully autonomous device operation. Programmable output voltage slew rates (individually programmable) helps improve electromagnetic compatibility (EMC) performance. To avoid shutting off the device upon inrush current, while still being able to closely track the load current, a dynamic overcurrent threshold profile is featured. Switching current of each channel can be sensed with a programmable sensing ratio. Whenever communication with the external microcontroller is lost, the device enters a Fail-safe operation mode, but remains operational, controllable, and protected.

Features

•Two fully-protected 22 mΩ (at 25 °C) high-side switches

•Up to 4.2 A steady state current per channel

•Separate bulb and DC motor latched overcurrent handling

•Individually programmable internal/external PWM clock signals

•Overcurrent, short-circuit, and overtemperature protection with programmable autoretry functions

•Accurate temperature and current sensing

•Open load detection (channel in OFF and ON state), also for LED applications (7.0 mA typ.)

•Normal operating range: 8.0 V to 36 V, extended range: 6.0 V to 58 V

•3.3 V and 5.0 V compatible 16-bit SPI port for device control, configuration and diagnostics at rates up to 8.0 MHz

Applications

•Truck, bus and 24 V transportation systems

•Resistive, capacitive, and inductive loads