50-W Opto-Regulated Multi-Output Flyback Converter Reference Design for 380-480VAC Motor Drives
Description
This reference design showcases a robust: compact: and efficient main power supply in DCM flyback topology for motor drives using the UCC28740 flyback controller. This design can work with a wide input voltage range of 290–1000 VDC delivering up to 50 W of continuous power. Multiple output rails at 24 V (1.25 A): 15 V (0.67 A): 5 V (2 A): 3.3 V (0.1 A) are available for control: gate drive: sensor: I/O: and other applications; additionally an isolated 5-V (0.1 A) output is provided for isolated communication power. The load and line regulation are within 0.5% over the entire operation range by the use of opto-regulated feedback. Key benefits of the UCC28740 device include valley switching enabling higher efficiency (>85% at 550 VDC: 50 W): internal HV FET enabling self-start without external circuitry: and frequency dithering that reduces EMI.
Features
- Wide input range of 290-1000V DCSelf-start using internal 700V HC FET without any external circuitryLoad and line regulation Multiple output rails - 24V(1.25A): 15V(0.67A): 5V(2A): 3.3V(0.1A) and isolated 5V(0.1A) providing 50W of output power in ambient of up to 70 °C. De-rated operation up to 85 °C ambientOutput overvoltage: output overcurrent and input undervoltage protectionFrequency dithering to reduce EMI
Applications
- AC drive power stage module
- Motor diagnostics & monitoring
- Servo drive power stage module
- Servo drive power supply module
- Railway auxiliary power
- Railway electric propulsion
- Power supply module
- Robot I/O module
- Linear motor power supply
- Robot servo drive
Product Categories
- Power management