A3941 используется с N-канальными силовыми МОП-транзисторамиFull-bridge controllerIt is especially designed for automotive applications using high-power inductive loads such as DC brush motors.
Unique charge pump regulator provides complete (>10 V)Gate driversдля работы с напряжением аккумулятора до 7 В и позволяет A3941 работать, когда напряжение драйвера затвора падает до 5.5 В.
The bootstrap capacitor is used to provide the above battery supply voltage required for the N-channel MOSFET. The high-side drive internal charge pump allows DC (100% duty cycle) operation.
Diodes or synchronous rectification can be used to put the full bridge in fast or slow delay mode. In slow delay mode, current freewheeling can pass through either a high-side or low-side FET. The resistor adjusts the inductive time, which saves the power FET from breakdown.
Integrated diagnostics indicate undervoltage, overtemperature, and power bridging faults, and can be configured to protect the power MOSFETs under most short-circuit conditions.
A3941 выпускается в 28-контактном корпусе питания TSSOP с открытой термопрокладкой (суффикс LP). Бессвинцовая упаковка со 100% матовым оловянным покрытием свинцовой рамы.
- N-channel MOSFET full-bridge high-current gate driver
- High-side or low-side PWM switches
- The charge pump operates at low supply voltages
- Накачка заряда обеспечивает 100% ШИМ при полной зарядке
- Cross-conduction protection with adjustable inductive time
- Диапазон напряжения питания от 5.5 до 50 Вс
- Integrated 5 V regulator
- Diagnostic output
- Low current sleep mode