This new device is based on Allegro's latest BCD semiconductor process technology and has features for automotive and industrial high-temperature systems powered by 24V batteries. Allegro said, in particular, improved troubleshooting, flexible input logic and boot load management.
A3941 In response to the needs of the automotive market, the automotive market is looking for new technologies to replace belt drive and hydraulic actuators with more efficient systems. Most belt-driven actuators lose system efficiency even when not in use. The company said that the A3941 is designed to meet the emerging needs of this market by replacing all belt-driven actuators with a fully electronic system using a variety of engine technologies. The new device can drive four external N-channel MOSFETs in a complete bridge configuration. It is commonly used in brushed DC motor applications, in which case high currents and high ambient temperatures require the use of external MOSFETs.
The A3941 is designed for high-temperature automotive applications and can be rated over the entire automotive temperature range (-40 ° C to + 150 ° C junction temperature) with a total battery voltage of 7 V to 50V. The pump load provides a gate driver that provides full gate drive with battery voltages as low as 7 V and reduces battery voltage to 5.5V. Configurable, flexible input logic for high-end or low-end PWM (pulse width modulation) internal synchronous rectification logic to run on the high-end or high-end without interruption. The low side depends on the PWM logic.
An adjustable drain-source monitor provides adjustable short-circuit protection for external MOSFETs. Improved diagnostics improve decoding and fault identification. Intelligent management of the startup capacitor automatically monitors the startup load and generates update pulses when necessary. It also includes a low-current "idle" mode and adjustable cross-conduction protection cross timeout. The A3941 is available in a 28-pin eTSSOP miniature thermal efficiency package with an exposed tray.
