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参数资料
| 型号： | UC3902DTRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | GREEN, SOIC-8 |
| 文件页数： | 1/10页 |
| 文件大小： | 293K |
| 代理商： | UC3902DTRG4 |
UC2902
UC3902
SLUS232D DECEMBER 19, 2002 REVISED NOVEMBER 2008
LOAD SHARE CONTROLLER
1
www.ti.com
FEATURES
D 2.7-V to 20-V Operation
D 8-Pin Package
D Requires Minimum Number of External
Components
D Compatible with Existing Power Supply
Designs Incorporating Remote Output
Voltage Sensin
D Differential Share Bus
D Precision Current Sense Amplifier (40 Gain)
D UVLO (Undervoltage Lockout) Circuitry
D User Programmable Share Loop
Compensation
APPLICATIONS
D Paralelled Power Supplies
DESCRIPTION
The UC3902 load share controller is an 8-pin
device that balances the current drawn from
independent, paralleled power supplies. Load
sharing is accomplished by adjusting each
supplies’ output current to a level proportional to
the voltage on a share bus.
The master power supply, which is automatically
designated as the supply that regulates to the
highest voltage, drives the share bus with a
voltage proportional to its output current. The
UC3902 trims the output voltage of 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 capability
can be paralleled with each supply providing the
same percentage of their output current capability
for a particular load.
UDG01141
1
3
2
4
8
6
7
5
+
R
40R
+
ADJ AMPLIFIER
BIAS
UVLO
+
+
+
SHARE SENSE AMPLIFIER
SHARE DRIVE AMPLIFIER
2.3 V
35 mV
+
0.6 V
+
CURRENT SENSE
AMPLIFIER
ERROR AMPLIFIER
GND
SENSE
ADJ
ADJR
VCC
SHARE+
SHARE
COMP
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
2002 2008, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UC3902N | 功能描述:其他电源管理 LOAD SHARE CONTROLLER RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| UC3902N | 制造商:Texas Instruments 功能描述:LOAD SHARE CONTROLLER 3902 DIP8 |
| UC3902NG4 | 功能描述:其他电源管理 LOAD SHARE CONTROLLER RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| UC3903 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Quad Supply and Line Monitor |
| UC3903DW | 功能描述:监控电路 Quad Supply and Line Monitor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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