Datasheet > UCC28700_14

UCC28700_14

更新时间： 2024-09-21 02:58:31

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
30页	1683K
描述
Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

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UCC28700_14 数据手册

UCC28700, UCC28701

UCC28702, UCC28703

www.ti.com

SLUSB41 – JULY 2012

Constant-Voltage, Constant-Current Controller

With Primary-Side Regulation

Check for Samples: UCC28700, UCC28701, UCC28702, UCC28703

FEATURES

DESCRIPTION

The UCC28700 family of flyback power supply

controllers provides 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. Low start-up current,

dynamically-controlled operating states and a tailored

modulation profile support very low stand-by power

without sacrificing start-up time or output transient

response.

•

< 30-mW No-Load Power for 5-Star Rating

Primary-Side Regulation (PSR) Eliminates

Opto-Coupler

•

±5% Voltage and Current Regulation

130-kHz Maximum Switching Frequency

Enables High-Power Density Charger Designs

•

Quasi-Resonant Valley-Switching Operation

for Highest Overall Efficiency

Patent-Pending Frequency-Jitter Scheme to

Ease EMI Compliance

Control algorithms in the UCC28700 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.

•

Wide VDD Range Allows Small Bias Capacitor

Clamped Gate-Drive Output for MOSFET

Protection Functions: Over-Voltage, Low-Line,

and Over-Current

•

Programmable Cable Compensation

(UCC28700 only)

NTC Resistor Interface (UCC28701, UCC28702

and UCC28703 only) with Fixed Cable

Compensation Options

The controllers have a maximum switching frequency

of 130 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 UCC28700 allows the level of

cable compensation to be programmed. The

UCC28701, UCC28702 and UCC28703 devices allow

•

SOT23-6 Package

APPLICATIONS

•

USB-Compliant Adapters and Chargers for

Consumer Electronics (cell phones, tablets

and cameras)

remote temperature sensing using

Negative

Temperature Coefficient (NTC) resistor while

providing fixed cable-compensation levels.

•

AC and DC Power Supplies

Simplified Application Diagram and Typical V-I Regulation

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...30

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与UCC28700_14相关器件

型号	品牌	获取价格	描述	数据表
UCC28700DBVR	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28700DBVT	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28700-Q1	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28700-Q1_15	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28700QDBVRQ1	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28701	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28701D	ETC	获取价格	Analog IC
UCC28701DBVR	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28701DBVT	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
UCC28702	TI	获取价格	Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

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