- Half-bridge motor driver achieves 99.2 per cent efficiency
- Eliminates the need for a heatsink
Power Integrations, a developer of high-voltage, energy-efficient ICs for power conversion, has announced that its BridgeSwitch™ integrated half-bridge (IHB) motor driver IC family has been expanded and now supports applications requiring up to 400 W.
These ICs feature high-side and low-side advanced FREDFETs (Fast Recovery Diode Field Effect Transistors), which include lossless current sensing to achieve an efficiency of up to 99.2 per cent in brushless DC (BLDC) motor-drive applications. This further allows a distributed thermal footprint along with completely removing any need of a heatsink, thus reducing both system cost and weight.
Self-powered protection feature
The new 400 W BRD1167 and BRD1267 ICs deliver up to 1.33 A RMS, 11.5 A DC output peak current. They are self-powered and can drive single or multi-phase high-voltage, synchronous or asynchronous motors, and support all popular MCU and motor control algorithms.
All BridgeSwitch ICs feature cycle-by-cycle hardware-based overcurrent, over/under-voltage and over-temperature protection features, which eliminate the software component from many protection functions.
Enabling effective communication
The new, uprated BRD1167 and BRD1267 devices also feature built-in device protection and system monitoring and a robust single-wire preventive maintenance interface, which enables communication between the motor microcontroller and up to three BridgeSwitch devices. Each device may be configured with different high and low-side current limits, thus eliminating the role of the microcontroller and external circuitry in protecting the system from open or shorted motor windings.
Cristian Ionescu-Catrina, senior product marketing manager, Power Integrations said, “BridgeSwitch is a scalable solution for single- and multi-phase inverter designs. The increased 400 W power capability will allow the family to support applications with higher RMS current and thermally challenging requirements, such as range hoods, compressors, fans and pumps.”
This simplifies IEC 60335 and 60730 certification, saving time and cost.
Samples of BRD1167 & BRD1267 BridgeSwitch ICs in compact InSOP-24C surface-mount packages will be available in May 2020.