UCC28722 - Constant-Voltage, Constant-Current Controller with Primary-Side Regulation..

UCC28722是TI德州仪器公司的一款反激式控制器产品，UCC28722是Constant-Voltage, Constant-Current Controller with Primary-Side Regulation..，本站介绍了UCC28722的封装应用图解、特点和优点、功能等，并给出了与UCC28722相关的TI元器件型号供参考。

UCC28722 - Constant-Voltage, Constant-Current Controller with Primary-Side Regulation.. - 反激式控制器 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品特性

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

产品应用

USB-Compliant Adapters and Chargers for Consumer Electronics
- Smart Phones
- Tablet Computers
- Cameras
Standby Supply for TVs and Desktops
White Goods

产品说明

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 peak-primary 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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
UCC28722	DBV (6)	2.90 mm × 1.60 mm

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