UCC28712 - 具有一次侧稳压功能的恒压、恒流控制器

UCC28712是TI德州仪器公司的一款反激式控制器产品，UCC28712是具有一次侧稳压功能的恒压、恒流控制器，本站介绍了UCC28712的封装应用图解、特点和优点、功能等，并给出了与UCC28712相关的TI元器件型号供参考。

UCC28712 - 具有一次侧稳压功能的恒压、恒流控制器 - 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

< 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

产品应用

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

Simplified Application

产品说明

The UCC2871x 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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
UCC28710	SOIC (7)	4.91 mm × 3.90 mm
UCC28711
UCC28712
UCC28713
UCC28714
UCC28715

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