RDK-853: 300W, 920mA @ 270 ~ 365V, 3-Phase BLDC Motor Driver

The RDK-853 evaluation board is a 300 W, 97% efficient, three-phase inverter for high-voltage brushless DC (BLDC) motor application using three BridgeSwitch BRD1265C devices. The design shows the device performance, internal level monitoring, system level monitoring, and fault protection facilitated by the high level of integration of the BridgeSwitch halfbridge motor driver IC. A high-voltage, low component count buck converter employing a LinkSwitch-TN2 LNK3204D device supplies the current sense amplifier and optionally provides external bias for the BridgeSwitch devices.

Features

• Fully self-biased operation – simplifies auxiliary power supply but can also support external bias operation as needed

• High-side and low-side cycle-by-cycle current limit

• Two level device over-temperature protection

• High-voltage bus monitor with four undervoltage threshold and one overvoltage threshold

• System level temperature monitor

• Single wire status update communication bus

• Supports any microcontroller (MCU) for sensorless field oriented control (FOC) through the signal interface

• Instantaneous phase current output signal for each BridgeSwitch

• Fault reporting for each device through the FAULT BUS pin on the interface

• +5V supply ready through the interface