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Power Integrations BridgeSwitch Integrated Half-Bridge Motor-Driver ICs

High-voltage half-bridge motor-driver IC produces high inverter efficiency
Power Integrations’ BridgeSwitch™ family of integrated half-bridge motor-driver ICs feature advanced 600V N-channel power switches and sensing capability which enable the inverter in a Brushless DC motor-drive application to achieve efficiency of up to 99.2%

This high efficiency and the distributed thermal footprint of the BridgeSwitch IC eliminate the need for a heat-sink, reducing both the cost and weight of motor-drive applications and other high-voltage systems.

BridgeSwitch ICs feature high- and low-side FREDFETs (Fast Recovery Diode Field Effect Transistors) with integrated lossless current sensing. These self-powered driver ICs can drive single- or multi-phase high-voltage, synchronous or asynchronous motors with power ratings of up to 400W, and support all popular motor-control algorithms.

The motor-driver ICs feature cycle-by-cycle hardware-based over-current, over-/under-voltage, and over-temperature protection features which eliminate the software component from many protection functions. This simplifies IEC 60335 and 60730 certification, saving development time and cost.

Featuring built-in system monitoring, the drivers have a robust single-wire preventive-maintenance interface which enables communication between the motor’s microcontroller and up to three BridgeSwitch devices. Each BridgeSwitch driver may be configured with different high- and low-side current limits, eliminating the role of the microcontroller and external circuitry in protecting the system from open or shorted motor windings.


Controlled switching speed for low EMI
Adaptive dead time
Simultaneous-conduction lock-out protection
Internal dual-level thermal overload protection


Single- or three-phase high-voltage motor drives
Home appliances
Condenser fans
Cooker hood fans

Reference Design Kits and Reference Designs
RDK-851 – 50W three-phase driver for fans
RDK-852 – 200W three-phase motor driver
RDK-853 – 300W three-phase motor driver
RDK-872 – 70W single-phase driver for fans
RDK-873 – 30W single-phase motor driver