Power Integrations Revs Up Motor-Drive Offering With BridgeSwitch-2 BLDC IC Family


Power Integrations the leader in high-voltage integrated circuits for energy-efficient power conversion enhanced its hardware-software bundle for brushless Motor-Drive with BridgeSwitch2, a new high-voltage integrated half-bridge otor-driver IC family targeting applications up to 1 HP (746 W). The new ICs, which feature high- and low-side drivers and advanced FREDFETs with integrated lossless current sensing, deliver inverter efficiency of up to 99 percent. Power IntegrationsMotor-Drive Offering With BridgeSwitch-2 The IHB architecture eliminates hot spots, which increases design flexibility and reliability, slashes component count and saves PCB area. BridgeSwitch-2 is supported by Power Integrations’ MotorXper software suite which includes single-phase trapezoidal control and three-phase sensor-less Field Oriented Control modules, speeding inverter development.

BridgeSwitch-2 ICs handle operational exceptions in hardware, which permits the use of IEC 60730 Class A safety software, reducing certification time by months.Power IntegrationsMotor-Drive Offering With BridgeSwitch-2 Quiescent BLDC inverters can be ordered into sleep-mode, reducing driver power consumption to less than 10 mW; this leaves more power available under regulated standby power limits to be allocated for loads such as network access and monitoring.

Cristian Ionescu-Catrina, product marketing manager at Power Integrations, said: “The low standby consumption of BridgeSwitch-2-based motor drives enables designers to meet new and emerging EU ERP regulations. BridgeSwitch-2 ICs are also far more efficient than IGBT based IPMs across the entire load range.” He continued: “From startup to performance optimization, the GUI-based tool, terminal emulator and MISRA C-compliant code library of MotorXpert greatly simplifies the design process, allowing the motor architecture to be optimized in real-time without repeated firmware updates. Power IntegrationsMotor-Drive Offering With BridgeSwitch-2 is microprocessor agnostic, easing its adoption into existing systems – this is important as engineers update designs to meet more stringent standby regulations.”

BridgeSwitch-2 ICs address a power range of 30 to 746 W (1 HP), encompassing a broad range of applications including heat exchanger fans, refrigerator compressors, fluid and circulation pumps, gas boiler combustion fans, washing machine drums and kitchen blenders and mixers. The IHB architecture reduces component count by 50 percent and PCB space by 30 percent over discrete designs by eliminating shunt resistors and associated signal conditioning circuits. Shunt losses are also eliminated, improving efficiency. Precise motor control is achieved with the built-in real-time reporting of phase current (IPH) information. Accurate turn-on/off gate drive and a soft-body diode result in a typical EMI profile 10 dB lower than existing drivers, so a smaller EMI filter can be selected.



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