The UCC28630 targets high-power, primary-side regulated flyback converters. The powerful gate driver and ability to operate in both CCM and DCM make the device suitable for applications with a wide power range. The peak power mode allows transient peak power delivery up to 200% of nominal rating, with only a 25% peak current increase, maximizing transformer utilization.
The transformer bias winding is used to sense output voltage for regulation, and for low-loss input voltage sensing. Advanced sampling and processing techniques allow CCM operation, and deliver excellent output voltage regulation performance for opto-coupler-less designs at power levels of 100 W and above.
A high-voltage current source enables fast and efficient start-up. Advanced light-load modes are deployed (including switching frequency modulation and device sleep modes) to reduce both controller and system power consumption at no load and light load. These modes enable potential system designs to meet 30-mW no-load power for power designs up to 30 W nominal, 60 W peak.
The device has been designed for ease-of-use and incorporates many features to enable a wide range of designs. Extensive protection features are included to simplify system design.
|Duty Cycle (Max) (%)|
|Frequency (Max) (kHz)|
|UVLO Thresholds On/Off (V)|
|Operating Temperature Range (C)|
|Approx. Price (US$)|
|-40 to 125|
|0.60 | 1ku|
|Sample & Buy|
|Part #||Name||Product Family||Comments|
|UCC28910||700V Flyback Switcher with Constant-Voltage Constant-Current and Primary-side Control||AC/DC AND ISOLATED DC/DC POWER SUPPLY - PWM AND RESONANT CONTROLLER|
|UCC24610||Secondary Side Synchronous Rectifier Controller||AC/DC AND ISOLATED DC/DC POWER SUPPLY - Gate Driver|