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UC3914N

更新时间： 2024-09-11 03:57:19
品牌 Logo 应用领域
德州仪器 - TI 光电二极管
页数 文件大小 规格书
24页 491K
描述
5-V TO 35-V HOT SWAP POWER MANAGER

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中文翻译

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UC3914N 数据手册

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SLUS425C − DECEMBER 2003 − REVISED JULY 2004  
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FEATURES  
DESCRIPTION  
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5-V to 35-V Operation  
The UC3914 family of hot swap power managers  
Precision Maximum Current Control  
Precision Fault Threshold  
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  
hardware, while maintaining the integrity of the  
powered system. Complementary output drivers  
and diodes have been integrated for use with  
external capacitors as a charge pump to ensure  
sufficient gate drive to the external N-channel  
Programmable Average Power Limiting  
Programmable Overcurrent Limit  
Shutdown Control  
Charge Pump for Low R  
Drive  
High-Side  
DS(on)  
Latch Reset Function Available  
Output Drive V Clamping  
GS  
MOSFET transistor for low R  
. All control and  
DS(on)  
Fault Output Indication  
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 current 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  
50 mV with respect to VCC to minimize total  
dropout.  
18-Pin DIL and SOIC Packages  
SIMPLIFIED APPLICATION DIAGRAM  
6
9
18  
16  
IMAX  
VCC  
V
CC  
OSC PMP REF  
PMPB  
1
2
The fault current level is set with an external  
current sense resistor. 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  
UC2914/UC3914  
5
7
OSCB  
SENSE 17  
output appears as a current source is (V  
−
VCC  
VPUMP  
V
)/R  
.
IMAX SENSE  
OUT 11  
This part is offered in both 18-pin DW wide-body  
(SOIC) and dual-in-line (DIL) packages.  
SD  
4
VOUTS 12  
V
OUT  
FAULT  
10  
PLIM 14  
GND  
1
LR  
13  
CT  
15  
V
OUT  
V
CC  
UDG−03114  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
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Copyright 2003, Texas Instruments Incorporated  
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中文翻译

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UC3914N 替代型号

型号 品牌 替代类型 描述 数据表
UC2914DWTR TI

完全替代

 5-V TO 35-V HOT SWAP POWER MANAGER
UC3914DWTR TI

完全替代

 5-V TO 35-V HOT SWAP POWER MANAGER
UC3914DW TI

完全替代

 5-V TO 35-V HOT SWAP POWER MANAGER

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