Power Integrations automotive InnoSwitch3™

The AEC-Q100-qualified InnoSwitch™3 is a flyback switcher with integrated 750 V MOSFET and secondary-side sensing. The device family targets automotive EV applications, such as traction inverter, OBC (on-board charger), EMS (energy management DC/DC bus converters) and BMS (battery management systems).  This devices achieves ±3% accuracy for combined line and load regulation while eliminating isolated transformer sense-windings and optocouplers. The on-chip synchronous rectifier controller delivers over 90% efficiency at the nominal 400 VDC input voltage.

Key features

• AEC-Q100 qualified
• Up to 90% efficient across full load range
• Lowest component count PSU implementation
• Smallest PCB area

Additional features

• Accurate regulation of better than +/-3%
• 30 VDC to 550 VDC input voltage (up to 925 VDC with StackFET)
• Integrated FluxLink™ feedback
• Digitally controlled via the I²C interface

Applications

• Traction Inverter
• On-Board Charger (OBC)
• Energy Management System (EMS)
• Battery Management System (BMS)

Available tools

• Reference Design Kit (RDK-840Q): 750 V INN3977CQ up to 550 V Bus Voltage
• Design Example Reference (DER-859Q): 750 V INN3977CQ + StackFET up to 925 V Bus Voltage
• PI Expert includes the automotive-qualified InnoSwitch3.  This circuit design tool enables developers to design and tune the power supply and export BOM within minutes, ensuring the performance over the tough automotive conditions.