UCD74111 Texas instruments

UCD74111

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UCD74111

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Описание

UCD74111 is a multi-chip module integrating a driver device and two NexFET power MOSFETs into a thermally enhanced compact, 5 mm × 7 mm, QFN package. A 15-A output current capability makes the device suitable for powering DSP and ASIC. The device is designed to complement digital or analog PWM controllers. The PWM input of the driver device is 3-state compatible. Two driver circuits provide high charge and discharge current for the high-side N-channel FET switch and the low-side N-channel FET synchronous rectifier in a synchronous buck converter. A precision current sensing amplifier that processes the voltage present across an external current sense element measures and monitors the output current. The PWM controller on the IMON pin can use this amplified signal. On-board comparators monitor the voltage across the high-side switch and the voltage across the external current sense element to safeguard the power stage from sudden high-current loads. A single resistor for the high-side comparator sets the blanking delay. This delay guards against false reports coincident with switching edge noise. In the event of a high-side fault or an overcurrent fault, the high-side FET turns OFF and the fault flag (FLT) asserts to alert the PWM controller.

Integrates Synchronous Buck Driver and NexFET Power MOSFET Technology for High Power Density and High Efficiency
15-A Output Current Capability for DSP and ASIC
4.7-V to 14-V Input Voltage Range
Operational Switching Frequency Up to 2 MHz
Built-In High-Side Current Protection
DCR Current Sensing for Overcurrent Protection and Output Current Monitoring
Voltage Proportional to Load Current Monitor Output
Tri-State PWM Input for Power Stage Shutdown
UVLO Housekeeping Circuit
Integrated Thermal Shutdown
40-Pin, 5 mm x 7 mm, PQFN PowerStack Package

Supply voltage (min) (V)	4.7
Supply voltage (max) (V)	14
Number of outputs	1
Peak output current (A)	15
Input threshold	CMOS
Propagation delay time (µs)	0.085
Driver configuration	Single
Operating temperature range (°C)	-40 to 125
Rating	Catalog