ACT334 datasheet(2/12 Pages) ACTIVE-SEMI

2 / 12 page

ACT334

Rev 2, 14-Nov-12

Innovative Power

- 2 -

www.active-semi.com

PIN CONFIGURATION

PIN DESCRIPTIONS

PART NUMBER

TEMPERATURE RANGE

PACKAGE

PINS

PACKING

METHOD

TOP MARK

ACT334US-T

-40°C to 85°C

SOT23-6

TAPE & REEL

FSTA

NAME

DESCRIPTION

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.

GND

Ground.

Base Drive. Base driver for the external NPN transistor.

VDD

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

operation.

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

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.

SOT23-6

ACT334US-T

ORDERING INFORMATION

Rev 2, 14-Nov-12

ACT334 数据表(PDF) 2 Page - Active-Semi, Inc

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