ACT412US-T
ACT412US-T Datasheet
ACT412 Rev 1, 30-Oct-13
| Part | Datasheet |
|---|---|
ACT412US-T |
ACT412US-T (pdf) |
| Related Parts | Information |
|---|---|
EA412US |
EA412US |
| PDF Datasheet Preview |
|---|
| ActivePSRTM Quasi-Resonant PWM Controller • Patented Primary Side Regulation Technology • Quasi-Resonant Operation • Adjustable up to 120kHz Switching Frequency • +/-5% Output Voltage Regulation • Constant Power Operation Mode for Fast Start-up and Motor Drive Applications • 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 mode including cycle-by-cycle current limiting. 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, The Quasi-Resonant QR operation mode can effectively improve efficiency, reduce the EMI noise and further reduce the components in input filter. ACT412 is idea for application up to 36 Watt. Figure 1 Simplified Application Circuit • AC/DC Adaptors/Chargers for E-Shaver, Motor Driver, ADSL, Network Power, Cell Phone • Big Capacitive Load Application The ACT412 is a high performance peak current mode PWM controller which applies ActivePSRTM and ActiveQRTM technology. 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 ActiveQRTM technology, 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 PowerTM ActivePSRTM is a trademark of Active-Semi. Copyright 2013 Active-Semi, Inc. ACT412 ORDERING INFORMATION ACT412US-T TEMPERATURE RANGE -40°C to 85°C PACKAGE PINS SOT23-6 PACKING METHOD TUBE & REEL TOP MARK FRYS PIN CONFIGURATION PIN DESCRIPTIONS SOT23-6 ACT412US PIN NAME Current Sense Pin. Connect an external resistor RCS between this pin and ground to set peak current limit for the primary switch. GND Ground. GATE Drive. Gate driver for the external MOSFET transistor. VDD Power Supply. This pin provides bias power for the IC during startup and steady state operation. FB Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding. COMP Compensation Pin. Innovative PowerTM ActivePSRTM is a trademark of Active-Semi. Copyright 2013 Active-Semi, Inc. ACT412 ABSOLUTE MAXIMUM RATINGSc PARAMETER VALUE UNIT FB, CS, COMP to GND to + 6 VDD, GATE to GND to + 22 Maximum Power Dissipation SOT23-6 Operating Junction Temperature -40 to 150 Junction to Ambient Thermal Resistance Operating Junction Temperature 220 -40 to 150 Storage Temperature -55 to 150 Lead Temperature Soldering, 10 sec c Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods. ELECTRICAL CHARACTERISTICS |
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