UCC2918J

更新时间： 2024-10-02 13:15:07

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
7页	171K
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中文翻译

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UCC2918J 数据手册

application

INFO

UCC2918

UCC3918

available

Low On Resistance Hot Swap Power Manager

FEATURES

DESCRIPTION

• Integrated 0.06Ω Power

The UCC3918 Low on Resistance Hot Swap Power Manager provides complete

power management, hot swap capability, and circuit breaker functions. The only

components needed to operate the device, other than supply bypassing, are a tim-

ing capacitor, and 2 programming resistors. All control and housekeeping functions

are integrated, and externally programmable. These include the fault current level,

maximum output sourcing current, maximum fault time, and startup delay. In the

event of a constant fault, the internal fixed 3% duty cycle ratio limits the average

output power. The IFAULT pin allows linear programming of the fault level current

from 0A to 4A.

MOSFET

• 3V to 6V Operation

• External Analog control of

Fault Current from 0A to 4A

• Independent Analog Control

of Current Limit up to 5A

• Fast Overload Protection

• Uni-directional Switch

Fast overload protection is accomplished by an additional overload comparator. Its

threshold is internally set above the maximum sourcing current limit setting. In the

event of a short circuit or extreme current condition, this comparator is tripped,

shutting down the output. This function is needed since the maximum sourcing cur-

rent limit loop has a finite bandwidth.

• Minimal External Components

• 1µA I_CCwhen Disabled

• Programmable On Time

• Programmable Start Delay

• Fixed 3% Duty Cycle

When the output current is below the fault level, the output MOSFET is switched on

with a nominal resistance of 0.06Ω. When the output current exceeds the fault level

or the maximum sourcing level, the output remains on, but the fault timer starts

charging CT. Once CT charges to a preset threshold, the switch is turned off, and

remains off for 30 times the programmed fault time. When the output current

reaches the maximum sourcing level, the MOSFET transitions form a switch to a

constant current source.

(continued)

BLOCK DIAGRAM

CHARGE

PUMP

VIN

OVERLOAD

COMPARATOR

REVERSE

COMPARATOR

20mV

OUT

CURRENT SENSE

H = OPEN

IMAX

MAXIMUM

CURRENT

LEVEL

OVERCURRENT

COMPARATOR

14 VOUT

15 VOUT

16 VOUT

CURRENT

FAULT LEVEL

ON TIME

CONTROL

IFAULT

3% DUTY

CYCLE

THERMAL

SHUTDOWN

1.5V

–

INTERNAL

BIAS

SHTDWN

HEAT SINK GND

PINS

GND

FAULT

UDG-99153

SLUS384A - NOVEMBER 1999

12 3 4 5 6 7

中文翻译

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与UCC2918J相关器件

型号	品牌	获取价格	描述	数据表
UCC2918L	TI	获取价格	IC,POWER CONTROL/MANAGEMENT,BICMOS,LLCC,28PIN,CERAMIC
UCC2918N	TI	获取价格	0-4A, 3-6V Low RDSON Single Hot-Swap IC Hi-Side MOSFET, Industrial Temp. 16-PDIP -40 to 85
UCC2918PWPTR	TI	获取价格	0-4A, 3-6V Low RDSON Single Hot-Swap IC Hi-Side MOSFET, Industrial Temp. 24-TSSOP -40 to 8
UCC2918Q	ETC	获取价格	Power Control/Management
UCC2918QP	TI	获取价格	UCC2918 0-4A, 3-6V Low RDSON Single Hot-Swap IC Hi-Side MOSFET, Industrial Temp.
UCC2919	TI	获取价格	3V to 8V Hot Swap Power Manager
UCC2919D	TI	获取价格	3-V TO 8-V HOT SWAP POWER MANAGER
UCC2919DG4	TI	获取价格	3-V TO 8-V HOT SWAP POWER MANAGER
UCC2919DTR	TI	获取价格	3-V TO 8-V HOT SWAP POWER MANAGER
UCC2919DTRG4	TI	获取价格	3-V TO 8-V HOT SWAP POWER MANAGER

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