UC2907

更新时间： 2024-01-06 06:19:29

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
7页	271K
描述
Load Share Controller

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中文翻译

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数据手册
替代型号

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UC2907 数据手册

UC1907

UC2907

UC3907

Load Share Controller

FEATURES

DESCRIPTION

Fully Differential High Impedance

Voltage Sensing

The UC3907 family of Load Share Controller ICs provides all the necessary

features to allow multiple independent power modules to be paralleled such

that each module supplies only its proportionate share to total load current.

Accurate Current Amplifier for Precise

Current Sharing

This sharing is accomplished by controlling each module’s power stage

with a command generated from a voltage feedback amplifier whose refer-

ence can be independently adjusted in response to a common share bus

voltage. By monitoring the current from each module, the current share bus

circuitry determines which paralleled module would normally have the high-

est output current and, with the designation of this unit as the master, ad-

justs all the other modules to increase their output current to within 2.5% of

that of the master.

Opto Coupler Driving Capability

1.25% Trimmed Reference

Master Status Indication

4.5V TO 35V Operation

The current share bus signal interconnecting all the paralleled modules is a

low-impedance, noise-insensitive line which will not interfere with allowing

each module to act independently should the bus become open or shorted

to ground. The UC3907 controller will reside on the output side of each

power module and its overall function is to supply a voltage feedback loop.

The specific architecture of the power stage is unimportant. Either switch-

ing or linear designs may be utilized and the control signal may be either di-

rectly coupled or isolated though the use of an opto coupler or other

isolated medium.

Other features of the UC3907 include 1.25% accurate reference: a

low-loss, fixed gain current sense amplifier,

fully differential,

high-impedance voltage sensing capability, and a status indicator to desig-

nate which module is performing as master.

BLOCK DIAGRAM

VOLTAGE ERROR AMPLIFIER

(+) SENSE 11

–

12 COMP

VCC (4.5V TO 35V) 10

0.25V

DRIVE

1.75V

OPTO DRIVE

AMPLIFIER

1.0V

–

DRV

GROUND

AMPLIFIER

REF

1.750V

–

GND

20k

50k

(–) SENSE

POWER RTN

ARTIFICIAL GND

VREF

ISET

14 ADJ OUT

ADJUST

AMPLIFIER

50mV

13 ADJ INPUT

–

17.5k

ADJ

C/S OUT

40k

BUFFER

AMPLIFIER

CURRENT SENSE

AMPLIFIER

–

C/S (–)

C/S (+)

100

15 CURRENT SHARE BUS

16 STATUS INDICATE

–

10k

40k

UDG-99052

SLUS165 - MARCH 1999

12 3 4 5 6 7

中文翻译

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UC2907 替代型号

型号	品牌	替代类型	描述	数据表
UC3907	TI	功能相似	Load Share Controller

与UC2907相关器件

型号	品牌	获取价格	描述	数据表
UC2907DW	TI	获取价格	Load-Sharing Regulation Controller
UC2907DW	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, GREEN, SOIC-16
UC2907DWG4	TI	获取价格	LOAD SHARE CONTROLLER
UC2907DWTR	TI	获取价格	Load-Sharing Regulation Controller
UC2907J	TI	获取价格	Load Share Controller 16-CDIP -40 to 85
UC2907J	ROCHESTER	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, CDIP16, CERAMIC, DIP-16
UC2907L	TI	获取价格	Load-Sharing Regulation Controller
UC2907L/883B	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, CQCC20, CERAMIC, LCC-20
UC2907N	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP16, GREEN, PLASTIC, DIP-16
UC2907N	TI	获取价格	LOAD SHARE CONTROLLER

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