UC3827DW-1G4

更新时间： 2024-01-21 09:58:33

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
15页	279K
描述
Buck Current/Voltage Fed Push-Pull PWM Controllers

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数据手册
替代型号

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UC3827DW-1G4 数据手册

UC1827-1, UC1827-2

UC2827-1, UC2827-2

UC3827-1, UC3827-2

www.ti.com

SLUS365A–APRIL 1999–REVISED AUGUST 2005

BUCK CURRENT/VOLTAGE FED PUSH-PULL

PWM CONTROLLERS

FEATURES

DESCRIPTION

•

Ideal for Multiple Output and/or High

Voltage Output Voltage Converters

The UC3827 family of controller devices provides an

integrated control solution for cascaded buck and

push-pull converters. These converters are known as

current fed or voltage fed push-pull converters and

are ideally suited for multiple output and/or high

voltage output applications. In both current fed and

voltage fed modes, the push-pull switches are driven

at 50% nominal duty cycles and at one half the

switching frequency of the buck stage. In the current

fed mode, the two switches are driven with a speci-

fied over-lap period to prevent ringing and voltage

stress on the devices. In the voltage fed mode, the

two switches are driven with a specified gap time

between the switches to prevent shorting the trans-

former across the energy storage capacitor and to

prohibit excessive currents flowing through the de-

vices.

•

Up to 500 kHz Operation

High Voltage, High Current Floating

Driver for Buck Converter Stage

•

UC3827-1 Current Fed Controller has

Push-Pull Drivers with Overlapping

Conduction Periods

UC3827-2 Voltage Fed Controller has

Push-Pull Drivers with Nonoverlapping

Conduction Periods

Average Current Mode, Peak Current

Mode or Voltage Mode with Input

Voltage Feedforward Control for Buck

Power Stage

•

Wide Bandwidth, Low Offset,

Differential Current Sense Amplifier

The converter's output voltage is regulated by pulse

width modulation of the buck switch. The UC3827

contains complete protection and PWM control func-

tions for the buck converter. Easy control of the

floating switch is accomplished by the floating drive

circuitry. The gate drive waveform is level shifted to

Precise Short Circuit Current Control

support an input voltage up to 72 V_DC

BLOCK DIAGRAM

VEAOCEA+ CEAO RAMP

Voltage Error

Amplifier

VEA+

VEA−

CEA−

CSAO

CSA+

CSA−

0.7 V PWM Comparator

Current Error

Amplifier

Flying

Driver

V+

+3 V

ILIM Comparator

BUCK

SRC

Current Sense

Amplifier

INHBT

OSC

21 PGND

SYNC

OSC

DELAY

500 kHz

MAX

Push/Pull

Drivers

REF

24 PUSH

22 PULL

VCC

REF

UVLO

DELAY

GND

DELAY

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...15

中文翻译

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UC3827DW-1G4 替代型号

型号	品牌	替代类型	描述	数据表
UC2827DW-1G4	TI	完全替代	Buck Current/Voltage Fed Push-Pull PWM Controllers 24-SOIC -40 to 85
UC2827DW-2	TI	完全替代	Buck Current/Voltage Fed Push-Pull PWM Controllers
UC2827DWTR-1	TI	完全替代	Buck Current/Voltage Fed Push-Pull PWM Controllers

与UC3827DW-1G4相关器件

型号	品牌	获取价格	描述	数据表
UC3827DW-2	TI	获取价格	Buck Current/Voltage Fed Push-Pull PWM Controllers
UC3827DW-2G4	TI	获取价格	Buck Current/Voltage Fed Push-Pull PWM Controllers 24-SOIC 0 to 70
UC3827DWTR-1	TI	获取价格	Buck Current/Voltage Fed Push-Pull PWM Controllers
UC3827DWTR-1G4	TI	获取价格	Buck Current/Voltage Fed Push-Pull PWM Controllers
UC3827DWTR-2	TI	获取价格	Buck Current/Voltage Fed Push-Pull PWM Controllers
UC3827DWTR-2G4	TI	获取价格	Buck Current/Voltage Fed Push-Pull PWM Controllers
UC3827J-1	TI	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, CDIP24
UC3827N-1	TI	获取价格	Buck Current/Voltage Fed Push-Pull PWM Controllers
UC3827N-1G4	TI	获取价格	Buck Current/Voltage Fed Push-Pull PWM Controllers 24-PDIP 0 to 70
UC3827N-2	TI	获取价格	Buck Current/Voltage Fed Push-Pull PWM Controllers

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