ACT361
Rev 8, 14-Nov-12
High Performance
ActivePSR
TM
Primary Switching Regulator
FEATURES
•
Patented Primary Side Regulation
Technology
The ACT361 ensures safe operation with complete
protection against all fault conditions. Built-in
protection circuitry is provided for output short-
circuit, output over-voltage, line under-voltage, and
over temperature conditions.
The ACT361
ActivePSR
TM
is optimized for high
performance, cost-sensitive applications, and
utilizes Active-Semi’s proprietary primary-side
feedback architecture to provide accurate constant
voltage, constant current (CV/CC) regulation
without the need of an opto-coupler or reference
device. Integrated line and primary inductance
compensation circuitry provides accurate constant
current operation despite wide variations in line
voltage and primary inductance. Integrated output
cord resistance compensation further enhances
output accuracy. The ACT361 achieves excellent
regulation and transient response, yet requires less
than 150mW of standby power.
The ACT361 is optimized for 2W to 7W
applications. It is available in space-saving 6 pin
SOT23-6 package.
Figure 1:
Simplified Application Circuit
•
No Opto-Coupler
•
Best-in-Class Constant Voltage, Constant
Current Accuracy
•
•
•
•
Low EMI
Proprietary Fast Startup Circuit
Built-in Soft-Start Circuit
Integrated Line and Primary Inductance
Compensation
Resistance Compensation
•
Integrated Programmable Output Cord
•
Line Under-Voltage, Output Over-Voltage,
Output Short-Circuit and Over-Temperature
Protection
•
Complies with all Global Energy Efficiency
and CEC Average Efficiency Standards
•
Adjustable power from 2W to 7W
•
Minimum External Components
•
Tiny SOT23-6 Package
APPLICATIONS
•
Chargers for Cell Phones, PDAs, MP3,
Portable Media Players, DSCs, and Other
Portable Devices and Appliances
INPUT
OUTPUT
•
RCC Adapter Replacements
•
Linear Adapter Replacements
•
Standby and Auxiliary Supplies
VDD
BD
GENERAL DESCRIPTION
The ACT361 belongs to the high performance
patented
ActivePSR
TM
Family of Universal-input
AC/DC off-line controllers for battery charger and
adapter applications. It is designed for flyback
topology working in discontinuous conduction mode
(DCM). The ACT361 meets all of the global energy
efficiency regulations (CEC, European Blue Angel,
and US Energy Star standards) while using very
few external components.
ACT361
SW
CS
G
FB
Innovative Power
TM
-1-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.