UCC28911 700V Flyback Switcher with Constant-Voltage Constant-Current and Primary-side Regulation | TI.com

UCC28911 (ACTIVE)

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

 

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

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

WEBENCH® Designer UCC28911

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 15.00 to 305.00V
Vout  V 3.3 to 25V
Iout  A ≤ 3.5A
Ambient Temp  °C -40 to 125°C

Parametrics

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Part number Order Control method Output power 85-265 Vac (Max) (W) Output power 175-265 Vac (Max) (W) Vin (Min) (V) Topology Duty cycle (Max) (%) Frequency (Max) (kHz) UVLO thresholds on/off (V) Operating temperature range (C) Package size: mm2:W x L (PKG)
UCC28911 Order now Current     10     12     30     Buck
Flyback    
99     115     9.5/6.5     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28880 Order now Current     3     4     30     Buck     55     62     3.9/3.6     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28881 Order now Current     4.5     6     30     Buck     55     62     3.9/3.6     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)    
UCC28910 Order now Current     7.5     9.5     30     Buck
Flyback    
99     115     9.5/6.5     -40 to 125     7SOIC: 29 mm2: 6 x 4.9 (SOIC | 7)