ACT337
ORDERING INFORMATION
PART NUMBER
ACT337SH-T
Rev 2, 14-Nov-12
TEMPERATURE RANGE
-40°C to 85°C
PACKAGE
SOP-8
PINS
8
PACKING
METHOD
TAPE & REEL
TOP MARK
ACT337SH
PIN CONFIGURATION
SOP-8
ACT337SH
ACT337SH
PIN DESCRIPTIONS
PIN
SOP-8
1
2,4,7
8
6
5
3
NAME
SW
GND
BD
VDD
FB
CS
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.
Ground(2,4 and 7 pin must be connected together).
Base Drive. Base driver for the external NPN transistor.
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 (R
CS
) 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) /
R
CS
. For more detailed information, see Application Information.
Innovative Power
TM
-2-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
