UCC28634 Series
High power Flyback controller with PSR, peak power mode, Adj CC limit and Frequency Dither
Manufacturer: Texas Instruments
Catalog(2 parts)
| Part | Fault Protection | Output Isolation | Internal Switch(s)▲▼ | Voltage - Start Up▲▼ | Voltage - Breakdown▲▼ | Duty Cycle▲▼ | Package / Case | Package / Case▲▼ | Package / Case▲▼ | Package / Case▲▼ | Power (Watts)▲▼ | Supplier Device Package | Mounting Type | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Control Features | Frequency - Switching▲▼ | Frequency - Switching▲▼ | Frequency - Switching▲▼ | Topology |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit | Isolated | 14.75 V | 700 V | 0.699999988079071 ul | 8-SOIC | 7 ul | 0.003911599982529879 m | 3.900000095367432 ul | 30 W | 7-SOIC | Surface Mount | 16.5 V | 13 V | 125 °C | -40 °C | EN, Power Good, Soft Start, Sync | 120000 Hz | |||||
Current Limiting, Over Load, Over Temperature, Over Voltage | Isolated | 14.75 V | 0.699999988079071 ul | 8-SOIC | 7 ul | 0.003911599982529879 m | 3.900000095367432 ul | 30 W | 7-SOIC | Surface Mount | 20 V | 8 V | 125 °C | -40 °C | 120000 Hz | 200 Hz | Flyback |
Key Features
• High-Power, Primary-Side CV/CC RegulationContinuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) OperationBuilt-In 700-V Start-Up Current SourceActive 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 SinkLow Power Modes for <30-mW System StandbyBest-In-Class Light Load (10%) Efficiency >85%PSR design with no opto-coupler - can meet high CM isolation & surge requirementsVDD OVP for independent indirect output OV under open-feedback fault conditionsPeak-Power Mode for Transient OverloadShutdown Pin Interface for External NTCProtections: Overvoltage, Overcurrent, Over-Temperature, Overload Timer (UCC28630), AC Line UV, Brownout and Pin ProtectionsFrequency Dither to Ease EMI Compliance (except the UCC28632)Create a Custom Design Using the UCC2863x With theWEBENCH®Power DesignerHigh-Power, Primary-Side CV/CC RegulationContinuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) OperationBuilt-In 700-V Start-Up Current SourceActive 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 SinkLow Power Modes for <30-mW System StandbyBest-In-Class Light Load (10%) Efficiency >85%PSR design with no opto-coupler - can meet high CM isolation & surge requirementsVDD OVP for independent indirect output OV under open-feedback fault conditionsPeak-Power Mode for Transient OverloadShutdown Pin Interface for External NTCProtections: Overvoltage, Overcurrent, Over-Temperature, Overload Timer (UCC28630), AC Line UV, Brownout and Pin ProtectionsFrequency Dither to Ease EMI Compliance (except the UCC28632)Create a Custom Design Using the UCC2863x With theWEBENCH®Power Designer
Description
AI
The UCC2863x targets high-power, primary-side regulated flyback converters. The 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 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 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.
See the Device Comparison Table for details.
The UCC2863x targets high-power, primary-side regulated flyback converters. The 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 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 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.
See the Device Comparison Table for details.