DH321 Просмотр технического описания (PDF) - Fairchild Semiconductor

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Компоненты Описание

производитель

DH321

Green Mode Fairchild Power Switch (FPS™)

Fairchild Semiconductor 

FSDH321, FSDL321

Comparison Between FSDM311 and FSDx321

Function

Soft-Start

FSDM311

15mS

External Current Limit not applicable

Frequency Modulation not applicable

Burst Mode Operation Yes-built into

controller

Drain Creepage at

Package

7.62mm

FSDx321

15mS

Programmable of

default current limit

±1.5KHz @50KHz

±3.0KHz @100KHz

Yes-built into

controller

7.62mm

FSDx321 Advantages

• Gradually increasing current limit

during soft-start further reduces peak

current and voltage component

stresses

• Eliminates external components used

for soft-start in most applications

• Reduces or eliminates output

overshoot

• Smaller transformer

• Allows power limiting (constant over-

load power)

• Allows use of larger device for lower

losses and higher efficiency.

• Reduced conducted EMI

• Improve light load efficiency

• Reduces no-load consumption

• Transformer audible noise reduction

• Greater immunity to arcing as a result

of build-up of dust, debris and other

contaminants

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