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ACT513 参数 Datasheet PDF下载

ACT513图片预览
型号: ACT513
PDF下载: 下载PDF文件 查看货源
内容描述: ActiveQR准谐振PWM控制器 [ActiveQR Quasi-Resonant PWM Controller]
分类和应用: 控制器
文件页数/大小: 4 页 / 185 K
品牌: ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
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ACT513
Product Brief, 05-Dec-12
ActiveQR
TM
Quasi-Resonant PWM Controller
FEATURES
CCM and Quasi-Resonant Operation
Adjustable up to 45kHz Switching Frequency
OCP/OLP Protection
Integrated Patented Frequency Foldback
Technique
ACT513 integrates comprehensive protection. In
case of over temperature, over voltage, short
winding, short current sense resistor, open loop an
d overload conditions, it would enter into auto
restart mode including Cycle-by-Cycle current
limiting.
ACT513 is to achieve no overshoot and very short
rise time even with big capacitive load with the built-
in fast and soft start process.
In full load condition, ACT513 is able to be
designed to work in both CCM mode and DCM
mode to meet different types of applications. Quasi-
Resonant (QR) operation mode can effectively
improve efficiency during DCM operation, and
reduce the EMI noise and further reduce the
components in input filter.
ACT513 is for application up to 60 Watt.
Figure 1:
Simplified Application Circuit
Integrated Patented Line 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,
Cordless Phone, PDAs, E-books
Adaptors for Portable Media Player, DSCs,
Set-top boxes, DVD players, records
Linear Adapter Replacements
GENERAL DESCRIPTION
The ACT513 is a high performance peak current
mode PWM controller. ACT513 applies
ActiveQR
TM
and frequency foldback technique to reduce EMI
and improve efficiency. ACT513’s maximum design
switching frequency is set at 45kHz. Very low
standby power, good dynamic response and
accurate voltage regulation is achieved with an
opto-coupler and the secondary side control circuit.
The burst mode operation enables low standby
power of 100mW with small output voltage ripple.
By applying frequency foldback and
ActiveQR
TM
technology, ACT513 increases the average system
efficiency compared to conventional solutions and
exceeds the latest ES2.0 efficiency standard with
good margin.
Innovative Power
TM
ActiveQR
TM
-1-
www.active-semi.com
Copyright © 2012 Active-Semi, Inc.
is a trademark of Active-Semi.