Datasheet > UCC28250_10

UCC28250_10

更新时间： 2024-11-24 11:47:35

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
48页	757K
描述
Advanced PWM Controller With Pre-Bias Operation

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UCC28250_10 数据手册

UCC28250

www.ti.com

SLUSA29A –APRIL 2010–REVISED JUNE 2010

Advanced PWM Controller With Pre-Bias Operation

Check for Samples: UCC28250

FEATURES

DESCRIPTION

•

Pre-biased Startup

The UCC28250 PWM controller is designed for high

power density applications that may have stringent

pre-biased startup requirements. The UCC28250’s

integrated synchronous rectifier control outputs target

high efficiency and high performance topologies such

as half-bridge, full-bridge, interleaved forward, and

push-pull. The UCC27200 half bridge drivers and

UCC2732X MOSFET drivers used in conjunction with

the UCC28250 provide a complete power converter

solution.

•

Synchronous Rectifier Control Outputs with

Programmable Delays (Including Zero Delay

Support)

•

Voltage Mode Control with Input Voltage

Feed-Forward or Current Mode Control

•

Primary or Secondary-Side Control

3.3-V, 1.5% Accurate Reference Output

1-MHz Capable Switching Frequency

Externally

programmable

soft-start,

used

1% Accurate Cycle-by-Cycle Over Current

Protection with Matched Duty Cycle Outputs

conjunction with an internal pre-biased startup circuit,

allows the controller to gradually reach a steady-state

operating point under all output conditions. The

UCC28250 can be configured for primary or

secondary-side control and either voltage or current

mode control can be implemented.

•

Programmable Soft-Start and Hiccup Restart

Timer

Thermally Enhanced 4-mm x 4-mm QFN-20

Package and 20-pin TSSOP Package

The oscillator operates at frequencies up to 2 MHz,

and can be synchronized to an external clock. Input

voltage feedforward, cycle-by-cycle current limit, and

a programmable hiccup timer allow the system to

stay within a safe operation range. Input voltage,

output voltage and temperature protection can be

implemented. Dead time between primary-side switch

and secondary-side synchronous rectifiers can be

independently programmed.

APPLICATIONS

•

Half-Bridge, Full-Bridge, Interleaved Forward,

and Push-Pull Isolated Converters

•

Telecom and Data-com Power

Wireless Base Station Power

Server Power

Industrial Power Systems

Simplified Application Diagram

VIN (36 V ~ 75 V)

UCC27200

UCC28250

V_OUT

OVP

OUTA

OUTB

SRA

RAMP

Isolation

UCC2732x

SRB

COMP

Feedback and Isolation

GND

Not Shown: PS, SP, HICC, VDD, EA+, EA-, VREF, EN, ILIM, AND VSENSE

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...48

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与UCC28250_10相关器件

型号	品牌	获取价格	描述	数据表
UCC28250_12	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC28250PW	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC28250PWR	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC28250PWT	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC28250RGPR	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC28250RGPT	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC28251	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC28251PW	TI	获取价格	支持预偏置模式、适用于离线应用的高级半桥/全桥 PWM 控制器 \| PW \| 20 \| -
UCC28251PWR	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC28251PWT	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation

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