UCC28634DR

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UCC28634DR

High Power Flyback Controller With Primary-Side Regulation and Peak Power Mode

Packaging

Package | PIN: D | 7
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $1.61
10-24 $1.45
25-99 $1.34
100-249 $1.17
250-499 $1.08
500-749 $0.91
750-999 $0.74
1000+ $0.68

Features

  • 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.

Texas Instruments  UCC28634DR

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.