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 LM5021-Q1 UCC28600-Q1 UCC28700 UCC28700-Q1 UCC28710 UCC28730 UCC28740 UCC28880
Flyback
Buck    
Flyback     Flyback       Buck
Flyback    
Flyback     Flyback     Flyback     Buck
Synchronous Buck
Forward Flyback    
Current       Current     Current     Current     Current     Current     Current      
99     80     99     99     99     99     99     99     55    
115       130     132     132     100     83     100      
9.5/6.5       10.3
9.3    
21/8     21/8     21/8     21/7     21/7.75      
  1     1     1     1     1     1        
Current Limiting
Green Mode
HV Start-up
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Frequency Synchronization     Error Amplifier
Green Mode
Light Load Efficiency    
Error Amplifier
Green Mode
Light Load Efficiency
Low Power
Soft Switching    
Low Power
Light Load Efficiency
Error Amplifier
Soft Switching
Current Limiting
Thermal Shutdown
Green Mode
Input Line Monitor
Leading Edge Blanking    
Green Mode
HV Start-up
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Low Power
Light Load Efficiency
Soft Switching
Current Limiting
HV Start-up
Thermal Shutdown
Green Mode
Input Line Monitor
Leading Edge Blanking
Soft Start    
Low Power
Light Load Efficiency
Soft Switching
Current Limiting
HV Start-up
Green Mode
Input Line Monitor
Leading Edge Blanking
Soft Start    
 
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7SOIC     8VSSOP     8SOIC     6SOT-23     6SOT-23     7SOIC     7SOIC     7SOIC     7SOIC    
0.75 | 1ku     0.59 | 1ku     0.47 | 1ku     0.35 | 1ku     0.41 | 1ku     0.42 | 1ku     0.42 | 1ku     0.42 | 1ku     0.55 | 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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