UC3914

更新时间： 2024-02-02 15:00:39

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
14页	647K
描述
5V to 35V Hot Swap Power Manager

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中文翻译

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数据手册
替代型号

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UC3914 数据手册

UC1914

UC2914

UC3914

5V to 35V Hot Swap Power Manager

FEATURES

DESCRIPTION

• 5V to 35V Operation

The UC3914 family of Hot Swap Power Managers provides complete

power management, hot swap and fault handling capability. Integrating this

part and a few external components, allows a board to be swapped in or

out upon failure or system modification without removing power to the hard-

ware, while maintaining the integrity of the powered system. Complemen-

tary output drivers and diodes have been integrated for use with external

capacitors as a charge pump to ensure sufficient gate drive to the external

NMOS transistor for low R_DS(on). All control and housekeeping functions

are integrated and externally programmable and include the fault current

level, maximum output sourcing current, maximum fault time and average

power limiting of the external FET. The UC3914 features a duty ratio cur-

rent limiting technique, which provides peak load capability while limiting

the average power dissipation of the external pass transistor during fault

conditions. The fault level is fixed at 50mV with respect to VCC to minimize

total dropout. The fault current level is set with an external current sense re-

sistor. The maximum allowable sourcing current is programmed by using a

resistor divider from VCC to REF to set the voltage on IMAX. The maximum

current level, when the output appears as a current source is

• Precision Maximum Current Control

• Precision Fault Threshold

• Programmable Average Power

Limiting

• Programmable Overcurrent Limit

• Shutdown Control

• Charge Pump for Low R_DS(on)

High-Side Drive

• Latch Reset Function Available

• Output Drive V_GSClamping

• Fault Output Indication

• 18 Pin DIL and SOIC Packages

(VCC – V_IMAX)/R_SENSE

(continued)

BLOCK DIAGRAM

UDG-95134-2

SLUS425A - AUGUST 1999

12 3 4 5 6 7...14

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UC3914 替代型号

型号	品牌	替代类型	描述	数据表
UC2914	TI	功能相似	5V to 35V Hot Swap Power Manager

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