ACT364
Rev 4, 14-Nov-12
High Performance ActivePSRTM Primary Switching Regulator
few external components.
FEATURES
The ACT364 ensures safe operation with complete
• Patented Primary Side Regulation
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.
Technology
• No Opto-Coupler
• Suitable Operation Frequency up to 85kHZ
The ACT364 ActivePSRTM 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 ACT364 achieves excellent
regulation and transient response, yet requires less
than 150mW of standby power.
• 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
The ACT364 is optimized for compact size 2W to
6.3W charger applications. It is available in space-
saving 6 pin SOT23-6 package.
• Complies with all Global Energy Efficiency
and CEC Average Efficiency Standards
• Adjustable Power from 2W to 6.3W
• Minimum External Components
• Tiny SOT23-6 Package
Figure 1:
Simplified Application Circuit
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 ACT364 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 ACT364 meets all of the global energy
efficiency regulations (CEC, European Blue Angel,
and US Energy Star standards) while using very
Innovative PowerTM
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