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High power Flyback controller with PSR, peak power mode, X-Cap discharge, and freq dither

Inventory: 4,366

Download data sheet for UCC28630
  |   View additional information for UCC28630

Packaging information

Package | Pins SOIC (D) | 7
Operating temperature range (℃) Q (-40 to 125)
Package qty | Carrier: 75 | TUBE
View more packaging information

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-2-260C-1 YEAR
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View


  • High-Power, Primary-Side CV/CC Regulation
  • Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) Operation
  • Built-In 700-V Start-Up Current Source
  • Active X-Capacitor Discharge (UCC28630 and UCC28633)
  • Adjustable Constant-Current (CC) Mode Limiting (except for UCC28630)
  • High Gate Drive Current 1-A Source and 2-A Sink
  • Low Power Modes for <30-mW System Standby
  • Best-In-Class Light Load (10%) Efficiency >85%
  • PSR design with no opto-coupler - can meet high CM isolation & surge requirements
  • VDD OVP for independent indirect output OV under open-feedback fault conditions
  • Peak-Power Mode for Transient Overload
  • Shutdown Pin Interface for External NTC
  • Protections: Overvoltage, Overcurrent, Over-Temperature, Overload Timer (UCC28630), AC Line UV, Brownout and Pin Protections
  • Frequency Dither to Ease EMI Compliance (except the UCC28632)
  • Create a Custom Design Using the UCC2863x With the WEBENCH® Power Designer

All trademarks are the property of their respective owners.


The UCC2863x targetshigh-power, primary-side regulated flyback converters. The ability to operate in both CCM and DCMmake the device suitable for applications with a wide power range. The peak power mode allowstransient 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 forlow-loss input voltage sensing. Advanced sampling techniques allow CCM operation, and deliverexcellent output voltage regulation performance for opto-coupler-less designs at power levels of100 W and above.

A high-voltage current source enables fast and efficient start-up. Advanced light-loadmodes are deployed to reduce both controller and system power consumption at no load and lightload. These modes enable potential system designs to meet 30-mW no-load power for power designs upto 30 W nominal, 60 W peak.

The device has been designed for ease-of-use and incorporates many features to enable awide range of designs. Extensive protection features are included to simplify system design.

See the Device Comparison Table for details.

Qty Price
1-99 $1.61
100-249 $1.33
250-999 $0.96
1,000+ $0.72