700V Flyback Switcher with Constant-Voltage Constant-Current and Primary-side Control - UCC28910

UCC28910 (ACTIVE)

700V Flyback Switcher with Constant-Voltage Constant-Current and Primary-side Control

Related Terms

  • 30mW no load power
  • primary side regulation
  • integrated 700V MOSFET
  • start-up high frequency operation

Description

The UCC28910 is dedicated to isolated flyback power supplies and provides output voltage and current regulation without the use of an optical coupler. The device incorporates a 700-V power FET and a controller that processes operating information from the auxiliary flyback winding and from the power FET to provide precise output voltage and current control.

The integrated high-voltage current source for startup that is switched off during device operation and the controller current consumption that is dynamically adjusted, allows very low stand-by power.

Control algorithms in the UCC28910, combining switching frequency and peak primary current modulation, allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) with valley switching is used to reduce switching losses. The maximum switching frequency is 115 kHz. Protection features help to keep secondary and primary component stress levels in check across the operating range.

The controlled slope of the DRAIN voltage, during internal FET switch on and switch off, and the frequency jitter help to reduce EMI filter cost.

Features

  • Constant-Voltage (CV) and Constant-Current (CC) Output Regulation Without Optical-Coupler
  • ±5% Output Voltage Regulation Accuracy
  • ±5% Output Current Regulation With AC Line and Primary Inductance Tolerance Compensation
  • 700-V Start-Up and Smart Power Management Enable Best-in-Class <30-mW Standby Power
  • 115-kHz Maximum Switching Frequency Enables High-Power Density Designs
  • Valley Switching and Frequency Dithering to Ease EMI Compliance
  • Thermal Shut Down
  • Low Line and Output Over-Voltage Protection

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Parametrics Compare all products in PWM and Resonant Controller

 
Topology
Control Method
Duty Cycle (Max) (%)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Regulated Outputs (#)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
UCC28910 UCC28700 UCC28710
Flyback
Buck    
  Flyback    
Current     Current     Current    
99     99     99    
115     132     100    
9.5/6.5     21/8     21/8    
  1     1    
Current Limiting
Green Mode
HV Start-up
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Error Amplifier
Green Mode
Light Load Efficiency
Low Power
Soft Switching    
Green Mode
HV Start-up
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Catalog     Catalog     Catalog    
-40 to 125     -20 to 125     -40 to 125    
7SOIC     6SOT-23     7SOIC    
0.75 | 1ku     0.35 | 1ku     0.42 | 1ku    

Companion parts

Part # Name Product Family Comments
UCC28630   High Power Flyback Controller with Primary-Side Regulation and Peak Power Mode   AC/DC AND ISOLATED DC/DC POWER SUPPLY - PWM AND RESONANT CONTROLLER    
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