UCC28722DBVT Part Information

Details for UCC28722DBVT by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Power Management

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Part Description

The UCC28722 flyback power supply controller provides isolated-output constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. The device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Dynamically-controlled operating states and a tailored modulation profile support high-efficiency operation at all load levels without sacrificing output transient response. Control algorithms in the UCC28722 device allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a bipolar transistor power switch, enabling lower-cost converter design. Discontinuous conduction mode (DCM) with valley switching reduces switching losses, while 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 controller has a maximum switching frequency of 80 kHz and always maintains control of the peakprimary current in the transformer. Output overvoltage and overcurrent as well as input undervoltage protection features help keep primary and secondary component stresses in check. The UCC28722 also allows compensation for voltage drop in the cable to be programmed with an external resistor.

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Part Features

  • 80-kHz Maximum Switching Frequency Enables High-Power Density Charger Designs
  • < 50-mW No-Load Power
  • Dynamic BJT Drive
  • Output Overvoltage, Low-Line, and Overcurrent Protection Functions
  • Primary-Side Regulation (PSR) Eliminates Opto- Coupler
  • Programmable Cable Compensation
  • Quasi-Resonant Valley-Switching Operation for Highest Overall Efficiency
  • SOT23-6 Package
  • Wide VDD Range Allows Small Bias Capacitor
  • u00b1 5% Voltage and Current Regulation Across Line and Load

Part Specifications

Input Voltage AC Min -
Input Voltage AC Max -
AC / DC Converter Case Style SOT-23
No. of Pins 6Pins
Power Rating -
Topology Flyback
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
No. of Outputs 1Outputs
Output Voltage 5.9V
Supply Voltage Max 35V
Supply Voltage Min 9V
RoHS Compliant

Alternative Part Descriptions

  • Const.-Voltage/Current Controller SOT-23 | RS Components
  • CONSTANT VOLT/CURRENT CTRL, SOT-23-6 | Newark Electronics
  • Low-Cost CVCC Flyback controller With primary-side regulation for bipolar Power Device | Texas Instruments
  • Texas Instruments UCC28722DBVT Akü/Batarya Şarj Kontrolcü Entegresi, 6-Pinli SOT-23 | RS Components TR
  • Const.-Voltage/Current Controller SOT-23 | RS Components IT

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