製品概要
機能と利点
- Complete Single-Phase Point-of-Load (POL) Solution.
- 87.8% Full-Load Efficiency from 12VIN to 1VOUT at 15A.
- PMBus Telemetry of Output Current, Reference Voltage, Input Voltage, and Junction Temperature.
製品概要
The EVAL-LTM4740-AZ evaluation board features the LTM®4740: a complete, high-efficiency, high-power-density, single 15A DC-to-DC step-down power μModule® (micromodule) regulator with power management bus (PMBus) interface. The LTM4740 is available in a 49-lead 6.25mm × 6.25mm × 5.07mm ball grid array (BGA) package. Read the LTM4740 data sheet before using or making any hardware changes to the EVAL-LTM4740-AZ evaluation board.
The EVAL-LTM4740-AZ input voltage range is 3V to 15V, and the output voltage range is 0.4V to 5.5V. The maximum load current is 15A. The output voltage is adjusted through the feedback resistor divider or the PMBus VOUT_COMMAND (the factory default output voltage is 1V). The switching frequency range is 500kHz to 2MHz (factory default frequency is 500kHz), configured through the pin-strap resistor at the PGM1 or with PMBus commands. The resistor value at the PGM1 pin is also used to adjust the control loop compensation parameters. The resistor value at the PGM0 pin is used to configure the positive overcurrent (POC) protection triggering level and the factory-default PMBus address (0x39h). The factory default POC protection sets the peak inductor current limit to 20A. At a high ambient temperature, the current output may need to be derated (refer to the LTM4740 data sheet for more details).
The onboard 12-pin connector, the I2C/PMBus/System management bus (SMBus) DC1613A dongle controller, and the LTpowerPlay® development tool provide an easy way to communicate and program the EVAL-LTM4740-AZ evaluation board.