UC3847

更新时间： 2024-11-22 21:58:55

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
10页	644K
描述
Current Mode PWM Controller

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中文翻译

获取价格

数据手册
替代型号

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UC3847 数据手册

application

INFO

UC1846/7

UC2846/7

UC3846/7

available

Current Mode PWM Controller

FEATURES

DESCRIPTION

•

Automatic Feed Forward Compensation

The UC1846/7 family of control ICs provides all of the necessary

features to implement fixed frequency, current mode control

schemes while maintaining a minimum external parts count. The

superior performance of this technique can be measured in im-

proved line regulation, enhanced load response characteristics, and

a simpler, easier-to-design control loop. Topological advantages in-

clude inherent pulse-by-pulse current limiting capability, automatic

symmetry correction for push-pull converters, and the ability to par-

allel “power modules" while maintaining equal current sharing.

•

Programmable Pulse-by-Pulse Current

Limiting

•

Automatic Symmetry Correction in Push-pull

Configuration

•

Enhanced Load Response Characteristics

Parallel Operation Capability for Modular

Power Systems

Protection circuitry includes built-in under-voltage lockout and pro-

grammable current limit in addition to soft start capability. A shut-

down function is also available which can initiate either a complete

shutdown with automatic restart or latch the supply off.

•

Differential Current Sense Amplifier with

Wide Common Mode Range

•

Double Pulse Suppression

500mA (Peak) Totem-pole Outputs

1% Bandgap Reference

Under-voltage Lockout

Soft Start Capability

Other features include fully latched operation, double pulse sup-

pression, deadline adjust capability, and a 1% trimmed bandgap

reference.

The UC1846 features low outputs in the OFF state, while the

UC1847 features high outputs in the OFF state.

Shutdown Terminal

500kHZ Operation

BLOCK DIAGRAM

5.1 V

VIN 15

REFERENCE

REGULATOR

VREF

13 VC

SYNC 10

UVLO

LOCKOUT

F/F

11 A OUT

OSC

UC1846

Output Stage

C/S-

COMP

0.5 V

UC1847

Output Inverted

C/S+

14 B OUT

0.5 mA

12 GND

E/A

INV

CURRENT

LIMIT ADJUST

16 SHUTDOWN

COMP

350 mV

6 k

UDG-02057

SLUS352A - JANUARY 1997 - REVISED MARCH 2002

12 3 4 5 6 7...10

中文翻译

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UC3847 替代型号

型号	品牌	替代类型	描述	数据表
UC1847	TI	功能相似	Current Mode PWM Controller
UC3847DW	TI	功能相似	Current Mode PWM Controller
UC2847	TI	功能相似	Current Mode PWM Controller

与UC3847相关器件

型号	品牌	获取价格	描述	数据表
UC3847DW	TI	获取价格	Current Mode PWM Controller
UC3847DW	ROCHESTER	获取价格	0.5 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16, GREEN, SOIC-16
UC3847DWG4	TI	获取价格	Current Mode PWM Controller
UC3847DWTR	TI	获取价格	Current Mode PWM Controller
UC3847DWTRG4	TI	获取价格	Current Mode PWM Controller
UC3847FN	ETC	获取价格	Current-Mode SMPS Controller
UC3847J	TI	获取价格	Current Mode PWM Controller
UC3847L	TI	获取价格	0.5A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, CQCC20, CERAMIC, LCC-20
UC3847N	TI	获取价格	Current Mode PWM Controller
UC3847N	ROCHESTER	获取价格	0.5A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDIP16, GREEN, PLASTIC, DIP-16

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