Datasheet > ACT412US-T

ACT412US-T

更新时间： 2022-02-26 14:02:03

品牌	Logo	应用领域
技领 - ACTIVE-SEMI		/
页数	文件大小	规格书
17页	320K
描述
Patented Primary Side Regulation Technology

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ACT412US-T 数据手册

ACT412

Rev 1, 30-Oct-13

ActivePSR^TMQuasi-Resonant PWM Controller

mode including cycle-by-cycle current limiting.

FEATURES

ACT412 is to achieve no overshoot and very short

rise time even with big capacitive load (10000µF)

with the built-in fast and soft start process, .

• Patented Primary Side Regulation

Technology

• Quasi-Resonant Operation

The Quasi-Resonant (QR) operation mode can

effectively improve efficiency, reduce the EMI noise

and further reduce the components in input filter.

• Adjustable up to 120kHz Switching

Frequency

• +/-5% Output Voltage Regulation

ACT412 is idea for application up to 36 Watt.

• Constant Power Operation Mode for Fast

Figure 1:

Start-up and Motor Drive Applications

Simplified Application Circuit

• 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

• Less than 100mW Standby Power

• Complies with Global Energy Efficiency and

CEC Average Efficiency Standards

• Tiny SOT23-6 Packages

APPLICATIONS

• AC/DC Adaptors/Chargers for E-Shaver,

Motor Driver, ADSL, Network Power, Cell

Phone

• Big Capacitive Load Application

GENERAL DESCRIPTION

The ACT412 is a high performance peak current

mode PWM controller which applies ActivePSR^TM

and ActiveQR^TMtechnology. ACT412 achieves

accurate voltage regulation without the need of an

opto-coupler or reference device.

The ACT412 is designed to achieve less than

100mW Standby Power. By applying frequency fold

back and

ActiveQR^TMtechnology, ACT412

exceeds the latest ES2.0 efficiency standard.

ACT412 integrates comprehensive protection. In

case of over temperature, over voltage, short

winding, short current sense resistor, open loop

and overload conditions, it would enter auto restart

Innovative Power^TM

- 1 -

www.active-semi.com

Active-Semi Proprietary―For Authorized Recipients and Customers

ActivePSR^TMis a trademark of Active-Semi.

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