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 and UCC28911 are high-voltage flyback switchers that provide output voltage and current regulation without the use of an optical coupler. Both devices incorporate a 700-V power FET and a controller that process operating information from the flyback auxiliary winding and power FET to provide a 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 is dynamically adjusted with load. Both enable the very low stand-by power consumption.

Control algorithms in the UCC28910 and UCC28911, 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. Built-in protection features help to keep secondary and primary component stress levels in check across the operating range. The frequency jitter helps 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 Enables <30-mW Standby Power
  • 115-kHz Maximum Switching Frequency Design for High-Power Density
  • 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 Offline Converter

 
Control Method
Duty Cycle (Max) (%)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Special Features
Operating Temperature Range (C)
Package Group
Rating
Estimated Package Size (WxL) (mm2)
Approx. Price (US$)
UCC28910 LM5021-Q1 UCC28600-Q1 UCC28700 UCC28700-Q1 UCC28710 UCC28730 UCC28740 UCC28880 UCC28911
Current       Current     Current     Current     Current     Current     Current     Current     Current    
99     80     99     99     99     99     99     99     55     99    
115       130     132     132     100     83     100     66     115    
9.5/6.5       10.3
9.3    
21/8     21/8     21/8     21/7     21/7.75     3.9/3.6     9.5/6.5    
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    
Low Power
Light Load Efficiency
Current Limiting
Integrated Switch
HV Start-up
Thermal Shutdown
Green Mode
Leading Edge Blanking
Soft Start    
Light Load Efficiency
Current Limiting
Integrated Switch
Adjustable Switching Frequency
HV Start-up
Thermal Shutdown
Green Mode
Input Line Monitor
Leading Edge Blanking
Soft Start    
-40 to 125     -40 to 125     -40 to 105     -20 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
SOIC     VSSOP     SOIC     SOT-23     SOT-23     SOIC     SOIC     SOIC     SOIC     SOIC    
Catalog     Automotive     Automotive     Catalog     Automotive     Catalog     Catalog     Catalog     Catalog     Catalog    
7SOIC: 3.91 x 4.9: 29 mm2     8VSSOP: 3 x 3: 15 mm2     8SOIC: 3.91 x 4.9: 29 mm2     6SOT-23: 1.6 x 2.9: 10 mm2     6SOT-23: 1.6 x 2.9: 10 mm2     7SOIC: 3.91 x 4.9: 29 mm2     7SOIC: 3.91 x 4.9: 29 mm2     7SOIC: 3.91 x 4.9: 29 mm2     7SOIC: 3.91 x 4.9: 29 mm2     7SOIC: 3.91 x 4.9: 29 mm2    
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     0.82 | 1ku    
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