Datasheet > UCC3919PWTR

UCC3919PWTR

更新时间： 2024-11-19 23:39:07

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其他 - ETC		/
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描述
Power Control/Management

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数据手册

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UCC3919PWTR 数据手册

application

INFO

UCC1919

UCC2919

UCC3919

available

3V to 8V Hot Swap Power Manager

FEATURES

DESCRIPTION

• Precision Fault Threshold

The UCC3919 family of Hot Swap Power Managers provide complete

power management, hot swap, and fault handling capability. The

UCC3919 features a duty ratio current limiting technique, which pro-

vides peak load capability while limiting the average power dissipa-

tion of the external pass transistor during fault conditions. The

UCC3919 has two reset modes, selected with the TTL/CMOS com-

patible L/R pin. In one mode, when a fault occurs the IC repeatedly

tries to reset itself at a user defined rate, with user defined maximum

output current and pass transistor power dissipation. In the other

mode the output latches off and stays off until either the L/R pin is re-

set or the shutdown pin is toggled. The on board charge pump circuit

provides the necessary gate voltage for an external N-channel power

FET.

• Charge Pump for Low RDS_ONHigh Side

Drive

• Differential Sense Inputs

• Programmable Average Power Limiting

• Programmable Linear Current Control

• Programmable Fault Time

• Fault Output Indicator

• Manual and Automatic Reset Modes

• Shutdown Control w/Programmable

Softstart

• Undervoltage Lockout

• Electronic Circuit Breaker Function

BLOCK DIAGRAM

OVERLOAD

CHARGE

VDD

CSP

VDD

CAP

COMPARATOR

PUMP

–

LINEAR

CURRENT

AMPLIFIER

OVERCURRENT

COMPARATOR

DRIVER

10 GATE

–

VDD

–

CSN

50mV

UVLO

200mV

IMAX

VDD

1.5v

36µA

IBIAS

UVBIAS

SET

DOMINANT

FLT

UVBIAS

FLT

–

1.5V

0.5V

–

GND

RESET

DOMINANT

1.2µA

UDG-98123

Note: Pins shown for 14-pin package.

07/99

12 3 4 5 6 7...11

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