ACT334(2011) 查看數據表（PDF） - Active-Semi, Inc

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ACT334
(Rev.:2011)

High Performance ActivePSR™ Primary Switching Regulator

Active-Semi, Inc 

®

ORDERING INFORMATION

ACT334

Product Brief, 15-Apr-11

PART NUMBER

ACT334US-T

TEMPERATURE RANGE

-40°C to 85°C

PACKAGE PINS

SOT23-6

6

PACKING

METHOD

TAPE & REEL

TOP MARK

FSTA

PIN CONFIGURATION

SW 1

G2

BD 3

6 CS

5 FB

4 VDD

PIN DESCRIPTIONS

SOT23-6

ACT334US-T

PIN

NAME

DESCRIPTION

1

SW

Switch Drive. Switch node for the external NPN transistor. Connect this pin to the external

power NPN’s emitter. This pin also supplies current to VDD during startup.

2

G

Ground.

3

BD

Base Drive. Base driver for the external NPN transistor.

4

VDD

Power Supply. This pin provides bias power for the IC during startup and steady state

operation.

5

FB

Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding.

Current Sense Pin. Connect an external resistor (RCS) between this pin and ground to set

6

CS

peak current limit for the primary switch. The peak current limit is set by (0.396V × 0.9) /

RCS. For more detailed information, see Application Information.

Innovative PowerTM

-2-

www.active-semi.com

Copyright © 2011 Active-Semi, Inc.

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