UCC2912

更新时间： 2024-11-26 12:16:55

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
16页	659K
描述
PROGRAMMABLE HOT SWAP POWER MANAGER

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中文翻译

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数据手册

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UCC2912 数据手册

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SLUS241D − MARCH 1994 - REVISED NOVEMBER 2003

Integrated 0.15-Ω Power MOSFET

3-V to 8-V Operation

Unidirectional Switch

Thermal Shutdown

Fault-Output Indicator

Digital Programmable Current Limit

from 0 A to 3 A

Maximum-Output Current Can Be Set to 1 A

Above the Programmed Fault Level or to a

Full 4 A

Electronic Circuit Breaker Function

1µA I

When Disabled

Power SOIC, Low-Thermal Resistance

Packaging

Programmable On-Time

Programmable Start Delay

Fixed 3% Duty Cycle

description

The UCC3912 family of hot swap power managers provides complete power management, hot swap capability,

and circuit breaker functions. The only component required to operate the device, other than supply bypassing,

is the fault timing capacitor, C . 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 average output

power.

The internal 4-bit DAC allows programming of the fault level current from 0 A to 3 A with 0.25-A resolution. The

IMAX control pin sets the maximum sourcing current to 1 A above the fault level when driven low, and to a full

4 A when driven high for applications which require fast output capacitor charging.

When the output current is below the fault level, the output MOSFET is switched on with a nominal on resistance

of 0.15 Ω. When the output current exceeds the fault level, but is less than the maximum sourcing level, the

output remains switched on, but the fault timer starts charging C . Once C 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 from a switch to a constant current source. (continued)

block diagram

H = 4 A

VIN

IMAX 10

30 mV

REVERSE VOLTAGE

COMPARATOR

CHARGE

PUMP

−

OUT

CURRENT SENSE

4 A

POWER

FET

−

MAX CURRENT

LEVEL

LINEAR CURRENT AMPLIFIER

H = OPEN

1 A

ABOVE

FAULT

ON TIME

CONTROL

14 VOUT

15 VOUT

CURRENT FAULT

LEVEL 0A TO 3 A

−

3% DUTY

CYCLE

THERMAL

SHUTDOWN

OVERCURRENT

COMPARATOR

1.5 V

0 A−3 A

0.25

RES

−

INTERNAL

BIAS

SHTDWN

13 12

UDG-99146

B3 B2 B1 B0

4 BIT DAC

GND

FAULT

HEATSINK

GND PINS

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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与UCC2912相关器件

型号	品牌	获取价格	描述	数据表
UCC2912DP	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
UCC2912DP	TI	获取价格	PROGRAMMABLE HOT SWAP POWER MANAGER
UCC2912DPG4	TI	获取价格	PROGRAMMABLE HOT SWAP POWER MANAGER
UCC2912DPR	TI	获取价格	PROGRAMMABLE HOT SWAP POWER MANAGER
UCC2912DPRG4	TI	获取价格	PROGRAMMABLE HOT SWAP POWER MANAGER
UCC2912DPTR	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
UCC2912N	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP16, GREEN, PLASTIC, DIP-16
UCC2912NG4	TI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP16, GREEN, PLASTIC, DIP-16
UCC2912PWP	TI	获取价格	PROGRAMMABLE HOT SWAP POWER MANAGER
UCC2912PWP	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO24, GREEN, PLASTIC, TSSOP-24

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