Datasheet > UCC28251

UCC28251

更新时间： 2024-11-27 12:00:59

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
54页	902K
描述
Advanced PWM Controller With Pre-Bias Operation

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

UCC28251 数据手册

UCC28251

www.ti.com

SLUSBD8D –FEBRUARY 2013–REVISED APRIL 2013

Advanced PWM Controller With Pre-Bias Operation

Check for Samples: UCC28251

FEATURES

DESCRIPTION

The UCC28251 PWM controller is designed for high

power density applications that may have stringent

pre-biased startup requirements. The UCC28251’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 UCC27210 half bridge drivers and

UCC2752x MOSFET drivers used in conjunction with

the UCC28251 provide a complete power converter

solution.

•

Pre-biased Startup

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

Lower Minimum Operating Frequency

The UCC28251 is

a functional variant of the

1% Accurate Cycle-by-Cycle Over Current

Protection with Matched Duty Cycle Outputs

UCC28250 PWM Controller. While the same basic

functionality of the UCC28250 is largely maintained,

the UCC28251 is designed to enhance performance

in both offline, 400-V input DC-to-DC applications and

48-V input full-bridge or half-bridge applications.

•

Programmable Soft-Start and Hiccup Restart

Timer

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

Package and 20-pin TSSOP Package

Externally

programmable

soft-start,

used

conjunction with an internal pre-biased startup circuit,

allows the controller to gradually reach a steady-state

operating point under all output conditions. The

UCC28251 can be configured for primary or

secondary-side control and either voltage or current

mode control can be implemented.

APPLICATIONS

•

Half-Bridge, Full-Bridge, Interleaved Forward,

and Push-Pull Isolated Converters

•

Telecom and Data-com Power

Wireless Base Station Power

Server Power

The oscillator operates at frequencies up to 1.8 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.

Industrial Power Systems

Simple Application Diagram (400-V_INDC-to-DC Converter)

Secondary

Primary

400

Secondary

700-V Driver

UCC28251

OUTA

V_OUT

VREF

RAMP

Isolation

OUTB

Secondary

SRA

SRB

UCC2752x

VSENSE

GND

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

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...54

中文翻译

下载PDF

与UCC28251相关器件

型号	品牌	获取价格	描述	数据表
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
UCC28251RGPR	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC28251RGPT	TI	获取价格	Advanced PWM Controller With Pre-Bias Operation
UCC2825AL	TI	获取价格	2A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, CQCC20, CERAMIC, LCC-20
UCC2825AN	TI	获取价格	2A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDIP16, PLASTIC, DIP-16
UCC2825AQ	TI	获取价格	2A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20
UCC2825BN	TI	获取价格	2A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDIP16, PLASTIC, DIP-16
UCC2829DW-1	ROCHESTER	获取价格	2.2 A SWITCHING CONTROLLER, 4000 kHz SWITCHING FREQ-MAX, PDSO20, SOIC-20

与UCC28251相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

46
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

34
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

63
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

60

产品中心

服务支持

精选活动

关于我们

帮助中心

UCC28251

UCC28251 数据手册

与UCC28251相关器件

与UCC28251相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

UCC28251

UCC28251 数据手册

与UCC28251相关器件

与UCC28251相关文章

您还可以找

您在本页遇到什么问题？