UC3902

更新时间： 2024-01-27 23:48:56

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
6页	149K
描述
Load Share Controller

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中文翻译

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技术参数
数据手册
替代型号

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UC3902 技术参数

生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	TSSOP, TSSOP8,.25	针数：	8
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.82
其他特性：	UNDER VOLTAGE LOCKOUT	可调阈值：	YES
模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT	JESD-30 代码：	R-PDSO-G8
长度：	4.4 mm	信道数量：	1
功能数量：	1	端子数量：	8
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP8,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	电源：	2.5 V
认证状态：	Not Qualified	座面最大高度：	1.2 mm
子类别：	Power Management Circuits	最大供电电流 (Isup)：	10 mA
最大供电电压 (Vsup)：	10 V	最小供电电压 (Vsup)：	4 V
标称供电电压 (Vsup)：	2.5 V	表面贴装：	YES
技术：	BIPOLAR	温度等级：	COMMERCIAL
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	宽度：	3 mm

UC3902 数据手册

UC1902

UC2902

UC3902

PRELIMINARY

Load Share Controller

FEATURES

DESCRIPTION

• 2.7V to 20V Operation

The UC3902 load share controller is an 8-pin device that balances the cur-

rent drawn from independent, paralleled power supplies. Load sharing is

accomplished by adjusting each supply’s output current to a level propor-

tional to the voltage on a share bus.

• 8-Pin Package

• Requires Minimum Number of

External Components

The master power supply, which is automatically designated as the supply

that regulates to the highest voltage, drives the share bus with a voltage

• Compatible with Existing Power

Supply Designs Incorporating Remote proportional to its output current. The UC3902 trims the output voltage of

Output Voltage Sensing

the other paralleled supplies so that they each support their share of the

load current. Typically, each supply is designed for the same current level

although that is not necessary for use with the UC3902. By appropriately

scaling the current sense resistor, supplies with different output current ca-

pability can be paralleled with each supply providing the same percentage

of their output current capability for a particular load.

• Differential Share Bus

• Precision Current Sense Amplifier with

Gain of 40

• UVLO (Undervoltage Lockout)

Circuitry

A differential line is used for the share bus to maximize noise immunity and

accommodate different voltage drops in each power converter’s ground re-

turn line. Trimming of each converter’s output voltage is accomplished by

injecting a small current into the output voltage sense line, which requires a

small resistance (typically 20Ω – 100Ω) to be inserted.

• User Programmable Share Loop

Compensation

BLOCK DIAGRAM

LOAD SHARE CONTROLLER

GND

VCC

BIAS

UVLO

–

SHARE DRIVE AMPLIFIER

40R

SENSE

–

SHARE+

SHARE–

CURRENT SENSE

AMPLIFIER

SHARE SENSE AMPLIFIER

–

ERROR AMPLIFIER

ADJ

35mV

–

0.6V

ADJ AMPLIFIER

COMP

–

2.3V

ADJR

UDG-99042

SLUS232 - FEBRUARY 1999

12 3 4 5 6

中文翻译

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UC3902 替代型号

型号	品牌	替代类型	描述	数据表
UCC29002	TI	功能相似	ADVANCED 8-PIN LOAD-SHARE CONTROLLER

与UC3902相关器件

型号	品牌	获取价格	描述	数据表
UC3902D	TI	获取价格	LOAD SHARE CONTROLLER
UC3902DG4	TI	获取价格	具有 0°C 至 70°C 工作温度范围的 20V 负载共享控制器 \| D \| 8 \| 0
UC3902DTR	TI	获取价格	暂无描述
UC3902J	TI	获取价格	暂无描述
UC3902N	TI	获取价格	LOAD SHARE CONTROLLER
UC3902NG4	TI	获取价格	Load Share Controller 8-PDIP 0 to 70
UC3903	TI	获取价格	Quad Supply and Line Monitor
UC3903DW	TI	获取价格	Quad Supply and Line Monitor
UC3903DWG4	TI	获取价格	Quad Supply and Line Monitor
UC3903DWTR	TI	获取价格	Quad Supply and Line Monitor

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