UCC28720

更新时间： 2024-11-08 12:03:43

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
29页	1053K
描述
Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

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UCC28720 数据手册

UCC28720

www.ti.com

SLUSBE8 –MAY 2013

Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

Check for Samples: UCC28720

FEATURES

APPLICATIONS

•

< 10-mW No-Load Power

•

USB-Compliant Adapters and Chargers for

Consumer Electronics

Primary-Side Regulation (PSR) Eliminates

Opto-Coupler

–

Smart phones

Tablet computers

Cameras

•

±5% Voltage and Current Regulation Across

Line and Load

•

700-V Start-Up Switch

•

Standby Supply for TV and Desktop

White Goods

80-kHz Maximum Switching Frequency

Enables High-Power Density Charger Designs

•

Quasi-Resonant Valley-Switching Operation

for Highest Overall Efficiency

DESCRIPTION

The UCC28720 flyback power supply controller

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.

•

Wide VDD Range Allows Small Bias Capacitor

Dynamic BJT Drive

Overvoltage, Low-Line, and Overcurrent

Protection Functions

•

Programmable Cable Compensation

SOIC-7 Package

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.

SIMPLIFIED APPLICATION

Control algorithms in the UCC28720 allow operating

efficiencies to meet or exceed applicable standards.

The output drive interfaces to a bipolar transistor

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.

V_OUT

–

V_AC

UCC28720

V_AUX

VDD

DRV

The controller has a maximum switching frequency of

80 kHz and always maintains control of the peak-

primary current in the transformer. Protection features

help keep primary and secondary component

stresses in check. The UCC28720 allows

compensation for voltage drop in the cable to be

programmed with an external resistor.

CBC

GND

UDG-13090

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...29

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与UCC28720相关器件

型号	品牌	获取价格	描述	数据表
UCC28720D	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28720DR	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28722	TI	获取价格	具有初级侧调节功能、适用于双极性功率器件的低成本 CVCC 反激式控制器
UCC28722DBVR	TI	获取价格	具有初级侧调节功能、适用于双极性功率器件的低成本 CVCC 反激式控制器 \| DBV \|
UCC28722DBVT	TI	获取价格	具有初级侧调节功能、适用于双极性功率器件的低成本 CVCC 反激式控制器 \| DBV \|
UCC28730	TI	获取价格	Zero-Power Standby PSR Flyback Controller with CVCC and Wake-Up Monitoring
UCC28730_15	TI	获取价格	Zero-Power Standby PSR Flyback Controller with CVCC and Wake-Up Monitoring
UCC28730D	TI	获取价格	Zero-Power Standby PSR Flyback Controller with CVCC and Wake-Up Monitoring
UCC28730DR	TI	获取价格	Zero-Power Standby PSR Flyback Controller with CVCC and Wake-Up Monitoring
UCC28730-Q1	TI	获取价格	适用于汽车的零功耗待机 PSR 反激式控制器

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