Constant-Voltage, Constant-Current PWM Controller with Primary-Side Regulation - UCC28710

UCC28710 (ACTIVE)

Constant-Voltage, Constant-Current PWM Controller with Primary-Side Regulation

Description

The UCC28710 family of flyback power supply controllers provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.

An internal 700-V start-up switch, dynamically-controlled operating states and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28710 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controllers have a maximum switching frequency of 100 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28710, UCC28714 and UCC28715 allow the cable compensation to be programmed. The UCC28711, UCC28712 and UCC28713 devices allow remote temperature sensing using a negative temperature coefficient (NTC) resistor while providing fixed cable-compensation levels.

Features

  • < 10-mW No-Load Power
  • Primary-Side Regulation (PSR) Eliminates Opto-Coupler
  • ±5% Voltage and Current Regulation Across Line and Load
  • 700-V Start-Up Switch
  • 100-kHz Maximum Switching Frequency Enables High-Power Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for Highest Overall Efficiency
  • Frequency Jitter to Ease EMI Compliance
  • Wide VDD Range Allows Small Bias Capacitor
  • Clamped Gate-Drive Output for MOSFET
  • Overvoltage, Low-Line, and Overcurrent Protection Functions
  • Programmable Cable Compensation (UCC28710, UCC28714 and UCC28715)
  • NTC Resistor Interface (UCC28711, UCC28712 and UCC28713) with Fixed Cable Compensation Options
  • SOIC-7 Package

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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$)
UCC28710 LM5023 UCC28600 UCC28610 UCC28700 UCC28701 UCC28702 UCC28703 UCC28711 UCC28720 UCC28722 UCC28740 UCC28910
Flyback     Flyback     Flyback     Flyback         Flyback     Flyback     Flyback     Flyback     Buck
Flyback    
Flyback     Flyback
Buck    
Current     Current     Current     Current     Current     Current     Current     Current     Current     Current     Current     Current     Current    
99       99       99     99     99     99     99     99     99     99     99    
100     130     130     130     132     132     132     132     100     80     80     100     115    
21/8       10.3/9.3     10.2/8     21/8     21/8     21/8     21/8     21/8     21/7.7     21/7.7     21/7.75     9.5/6.5    
1     1     1     1     1     1     1     1     1            
Green Mode
HV Start-up
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Green Mode
Light Load Efficiency    
Error Amplifier
Green Mode
Light Load Efficiency    
Soft Switching     Error Amplifier
Green Mode
Light Load Efficiency
Low Power
Soft Switching    
Error Amplifier
Green Mode
Light Load Efficiency
Low Power
Soft Switching    
Green Mode
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Green Mode
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Green Mode
HV Start-up
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Current Limiting
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
Green Mode
Input Line Monitor
Leading Edge Blanking
Soft Start    
Current Limiting
Green Mode
HV Start-up
Input Line Monitor
Leading Edge Blanking
Light Load Efficiency
Low Power
Soft Start    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 105     -40 to 125     -20 to 125     -20 to 125     -20 to 125     -20 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
7SOIC     8VSSOP     8SOIC     8PDIP
8SOIC    
6SOT-23     6SOT-23     6SOT-23     6SOT-23     7SOIC     7SOIC     6SOT-23     7SOIC     7SOIC    
0.42 | 1ku     0.38 | 1ku     0.40 | 1ku     0.40 | 1ku     0.35 | 1ku     0.35 | 1ku     0.35 | 1ku     0.35 | 1ku     0.42 | 1ku     0.40 | 1ku     0.25 | 1ku     0.42 | 1ku     0.75 | 1ku    
WEBENCH® UCC28710
AC Frequency 60 Hz 50 Hz
    Min   Max   Range  
  VinRMS V    85.00 – 265.00V  
  Vout V    5.00 – 25.00V  
  Iout A    ≤ 4.00A  
  Ambient Temp °C    ≤ 100°C  
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