ACT334US-T

ACT334US-T Datasheet

ACT334 Rev 2, 14-Nov-12

Part	Datasheet
ACT334US-T	ACT334US-T (pdf)

Related Parts	Information
EA334US	EA334US

PDF Datasheet Preview
High Performance ActivePSRTM Primary Switching Regulator • Ultra Low Standby Power < 30mW • Patented Primary Side Regulation Technology • Suitable Operation Frequency up to 85kHZ • Proprietary Fast Startup Circuit • Integrated Line and Primary Inductance Compensation • Integrated Programmable Output Cord Resistance Compensation • Line Under-Voltage, Output Over-Voltage, Output Short-Circuit and Over-Temperature Protection • Complies with all Global Energy Efficiency and CEC Average Efficiency Standards • Adjustable Power from 2W to 6W • Minimum External Components • Tiny SOT23-6 Package over temperature conditions. The ACT334 ActivePSRTM is optimized for high performance, cost-sensitive applications, and utilizes Active-Semi’s proprietary primary-side feedback architecture to provide accurate constant voltage, constant current CV/CC regulation without the need of an opto-coupler or reference device. Integrated line and primary inductance compensation circuitry provides accurate constant current operation despite wide variations in line voltage and primary inductance. Integrated output cord resistance compensation further enhances output accuracy. The ACT334 achieves excellent regulation and transient response, yet requires less than 30mW of standby power. The ACT334 is optimized for compact size 2W to 6W charger applications. It is available in spacesaving 6 pin SOT23-6 package. Figure 1: Simplified Application Circuit • Chargers for Cell Phones, PDAs, MP3, Portable Media Players, DSCs, and Other Portable Devices and Appliances • RCC Adapter Replacements • Linear Adapter Replacements • Standby and Auxiliary Supplies The ACT334 belongs to the high performance patented ActivePSRTM Family of Universal-input AC/DC off-line controllers for battery charger and adapter applications. It is designed for flyback topology working in discontinuous conduction mode DCM . The ACT334 meets all of the global energy efficiency regulations CEC, European Blue Angel, and US Energy Star standards while using very few external components. The ACT334 ensures safe operation with complete protection against all fault conditions. Built-in protection circuitry is provided for output shortcircuit, output over-voltage, line under-voltage, and Innovative PowerTM Copyright 2012 Active-Semi, Inc. ORDERING INFORMATION ACT334 ACT334US-T TEMPERATURE RANGE -40°C to 85°C PACKAGE PINS SOT23-6 PACKING METHOD TAPE & REEL TOP MARK FSTA PIN CONFIGURATION PIN DESCRIPTIONS SOT23-6 ACT334US-T NAME Switch Drive. Switch node for the external NPN transistor. Connect this pin to the external power NPN’s emitter. This pin also supplies current to VDD during startup. GND Ground. Base Drive. Base driver for the external NPN transistor. Power Supply. This pin provides bias power for the IC during startup and steady state operation. Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding. Current Sense Pin. Connect an external resistor RCS between this pin and ground to set peak current limit for the primary switch. The peak current limit is set by 0.396V x / RCS. For more detailed information, see Application Information. Innovative PowerTM Copyright 2012 Active-Semi, Inc. ACT334 ABSOLUTE MAXIMUM RATINGSc PARAMETER VALUE UNIT VDD, BD, SW to GND to + 28 Maximum Continuous VDD Current FB, CS to GND to + 6 Continuous SW Current Internally limited Maximum Power Dissipation derate above TA = Junction to Ambient Thermal Resistance Operating Junction Temperature 220 -40 to 150 Storage Junction -55 to 150

PDF Datasheet Preview

High Performance ActivePSRTM Primary Switching Regulator
• Ultra Low Standby Power < 30mW
• Patented Primary Side Regulation

Technology
• Suitable Operation Frequency up to 85kHZ
• Proprietary Fast Startup Circuit
• Integrated Line and Primary Inductance

Compensation
• Integrated Programmable Output Cord

Resistance Compensation
• Line Under-Voltage, Output Over-Voltage,

Output Short-Circuit and Over-Temperature Protection
• Complies with all Global Energy Efficiency
and CEC Average Efficiency Standards
• Adjustable Power from 2W to 6W
• Minimum External Components
• Tiny SOT23-6 Package
over temperature conditions.

The ACT334 ActivePSRTM is optimized for high performance, cost-sensitive applications, and utilizes Active-Semi’s proprietary primary-side feedback architecture to provide accurate constant voltage, constant current CV/CC regulation without the need of an opto-coupler or reference device. Integrated line and primary inductance compensation circuitry provides accurate constant current operation despite wide variations in line voltage and primary inductance. Integrated output cord resistance compensation further enhances output accuracy. The ACT334 achieves excellent regulation and transient response, yet requires less than 30mW of standby power.

The ACT334 is optimized for compact size 2W to 6W charger applications. It is available in spacesaving 6 pin SOT23-6 package.

Figure 1:

Simplified Application Circuit
• Chargers for Cell Phones, PDAs, MP3,

Portable Media Players, DSCs, and Other Portable Devices and Appliances
• RCC Adapter Replacements
• Linear Adapter Replacements
• Standby and Auxiliary Supplies

The ACT334 belongs to the high performance patented ActivePSRTM Family of Universal-input AC/DC off-line controllers for battery charger and adapter applications. It is designed for flyback topology working in discontinuous conduction mode DCM . The ACT334 meets all of the global energy efficiency regulations CEC, European Blue Angel, and US Energy Star standards while using very few external components.

The ACT334 ensures safe operation with complete protection against all fault conditions. Built-in protection circuitry is provided for output shortcircuit, output over-voltage, line under-voltage, and

Innovative PowerTM

Copyright 2012 Active-Semi, Inc.
ORDERING INFORMATION

ACT334

ACT334US-T

TEMPERATURE RANGE
-40°C to 85°C

PACKAGE PINS

SOT23-6

PACKING METHOD

TAPE & REEL

TOP MARK

FSTA

PIN CONFIGURATION

PIN DESCRIPTIONS

SOT23-6 ACT334US-T

NAME

Switch Drive. Switch node for the external NPN transistor. Connect this pin to the external power NPN’s emitter. This pin also supplies current to VDD during startup.

GND Ground.

Base Drive. Base driver for the external NPN transistor.

Power Supply. This pin provides bias power for the IC during startup and steady state operation.

Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding.

Current Sense Pin. Connect an external resistor RCS between this pin and ground to set
peak current limit for the primary switch. The peak current limit is set by 0.396V x /

RCS. For more detailed information, see Application Information.

Innovative PowerTM

Copyright 2012 Active-Semi, Inc.

ACT334

ABSOLUTE MAXIMUM RATINGSc

PARAMETER

VALUE

UNIT

VDD, BD, SW to GND
to + 28

Maximum Continuous VDD Current

FB, CS to GND
to + 6

Continuous SW Current

Internally limited

Maximum Power Dissipation derate above TA = Junction to Ambient Thermal Resistance Operating Junction Temperature
220 -40 to 150

Storage Junction
-55 to 150

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Datasheet ID: ACT334US-T 522322