Active-semi IC ACT361

FEATURES
Patented Primary Side Regulation
Technology
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
Integrated Programmable Output Cord
Resistance Compensation
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
RCC Adapter Replacements
Linear Adapter Replacements
Standby and Auxiliary Supplies
GENERAL DESCRIPTION
The ACT361 belongs to the high performance
patented ActivePSRTM 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.
The ACT361 ensures safe operation with complete
protection against all fault conditions. Built-in
protection circuitry is provided for output shortcircuit,
output over-voltage, line under-voltage, and
over temperature conditions.
The ACT361 ActivePSRTM is optimized for high
performance, cost-sensitive applications, and
utilizes Active-Semis 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.

Active-semi IC ACT361