Texas Instruments UCC28630D

Description

The UCC2863x 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.

Features

High-Power, Primary-Side Regulation for OutputVoltage and Current, No Opto-Coupler RequiredContinuous Conduction Mode (CCM) andDiscontinuous Conduction Mode (DCM) OperationBuilt-In 700-V Start-Up Current SourceActive X-Capacitor Discharge Function(UCC28630 and UCC28633)Adjustable Constant-Current (CC) Mode Limiting(except for UCC28630)High Gate Drive Current 1-A Source and 2-A SinkLow Power Modes for <30-mW System StandbyBest-In-Class Light Load (10%) Efficiency >85%for 65-W Nominal Power DesignPeak-Power Mode for Transient OverloadShutdown Pin Interface for External NTCProtections: Overvoltage, Overcurrent, Over-Temperature, Overload Timer (UCC28630), ACLine UV, Brownout and Pin ProtectionsFrequency Dither to Ease EMI Compliance(except the UCC28632

Typical applications

• Open Frame SMPS for Industrial, Printer, White Industrial, Printer, White Device Information
• Energy Efficient AC-DC Supplies for Nomina Power 10-W to 65-W, (with up to 200% transient peak power)
• AC-DC Adapters for Notebook, Game Consoles, Printers

More information

• Datasheet
• IC product information