ACT41X
Product Brief, 06-Dec-12
ActivePSR
TM
Quasi-Resonant PWM Controller
FEATURES
•
Patented Primary Side Regulation
Technology
and overload conditions, it would enter auto restart
mode including cycle-by-cycle current limiting.
ACT41X is to achieve no overshoot and very short
rise time even with big capacitive load (4000µF)
with the built-in fast and soft start process, .
The Quasi-Resonant (QR) operation mode can
effectively improve efficiency, reduce the EMI noise
and further reduce the components in input filter.
ACT41X is idea for application up to 36 Watt.
Figure 1:
Simplified Application Circuit
•
Quasi-Resonant Operation
•
Adjustable up to 120kHz Switching
Frequency
•
•
•
•
+/-5% Output Voltage Regulation
Accurate OCP/OLP Protection
Integrated Output Cord Compensation
Integrated Line and Primary Inductance
Compensation
•
Built-in Soft-Start Circuit
•
Line Under-Voltage, Thermal, Output Over-
voltage, Output Short Protections
•
•
•
•
Current Sense Resistor Short Protection
Transformer Short Winding Protection
100mW Standby Power
Complies with Global Energy Efficiency and
CEC Average Efficiency Standards
•
Tiny SOT23-6 Packages
APPLICATIONS
•
AC/DC Adaptors/Chargers for Cell Phones,
ADSL, PDAs, E-books
•
Adaptors for Portable Media Player, DSCs,
and Other
GENERAL DESCRIPTION
The ACT41X is a high performance peak current
mode PWM controller which applies
ActivePSR
TM
and
ActiveQR
TM
technology. ACT41X achieves
accurate voltage regulation without the need of an
opto-coupler or reference device.
The ACT41X is designed to achieve less than
100mW Standby Power. By applying frequency fold
back and
ActiveQR
TM
technology, ACT41X
exceeds the latest ES2.0 efficiency standard.
ACT41X integrates comprehensive protection. In
case of over temperature, over voltage, short
winding, short current sense resistor, open loop
Innovative Power
TM
ActivePSR
TM
-1-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
is a trademark of Active-Semi.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
