## ACT337: Universal AC/DC Offline Controller Summary

Overview:

The ACT337 is a high-performance, patented universal-input AC/DC offline controller from Active-Semi, designed for battery chargers and adapters. It utilizes a flyback topology and discontinuous conduction mode (DCM) operation. It's optimized for cost-sensitive applications and meets global energy efficiency standards, including CEC.

Key Features:

️· Performance: Suitable for 7W to 12W applications.
️· Efficiency: Meets global energy efficiency regulations.
️· Technology:
- _ActivePSR_ (Active Power Supply Regulator) architecture provides constant voltage and current regulation without an optocoupler.
- Integrated line and primary inductance compensation.
- Programmable output cord resistance compensation.
- Fast startup circuit.
️· Protection: Integrated protection circuitry for over-voltage, over-current, and over-temperature conditions.
️· Package: SOP-8.
️· Operation: Flyback topology, DCM

Typical Applications:

️· RCC Adapter Replacements
️· Linear Adapter Replacements
️· Standby and Auxiliary Supplies

Ordering Information:

PART NUMBER	TEMPERATURE RANGE	PACKAGE	PINS	PACKING<br>METHOD	TOP MARK
ACT337SH-T	-40°C to 85°C	SOP-8	8	TAPE & REEL	ACT337SH

Pin Configuration Summary (Key Pins):

️· SW: Switch Drive
️· G: Ground
️· BD: Base Drive
️· VDD: Power Supply
️· FB: Feedback
️· CS: Current Sense

Bill of Materials (Example):

A sample Bill of Materials for a typical application includes a range of components like capacitors, resistors, diodes, transformers, and a transistor (Q1). Details can be found in Figure 6 in the datasheet.