ACT355AUC-T

ACT355AUC-T Datasheet

ACT355A Rev1, 09-Jul-08

Part	Datasheet
ACT355AUC-T	ACT355AUC-T (pdf)

PDF Datasheet Preview
ActivePSRTM Primary Switching Regulators • Multiple Patent-Pending Primary Side Regulation Technology • No Opto-coupler • Best Constant Voltage, Constant Current Over All Accuracy • Minimum External Components • Integrated Line and Primary Inductance Compensation • Integrated Output Cord Resistance Compen- sation • Line Under-Voltage Protection • Short Circuit Protection • Over Temperature Protection • Flyback Topology in DCM Operation • Complies with all Global Energy Efficient Regulations 0.3W Standby Power and CEC Average Efficiency • SOT23-5 Package • 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 ACT355A ensures safe operation with complete protection against all fault conditions. Built-in protection circuitry is provided for output shortcircuit, line under-voltage, and over-temperature conditions. The ACT355A ActivePSR is optimized for costsensitive 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 optocoupler 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. These products achieve excellent regulation and transient response, yet requires less than 300mW of standby power. The ACT355A is optimized for 2.5W to 3.5W applications such as 5V/500mA to 5V/700mA CV/CC chargers . It is available in a tiny SOT23-5 package. Figure 1: Typical Application Circuit HIGH VOLTAGE DC + CV/CC OUTPUT The ACT355A belongs to the high performance, multiple patent-pending ActivePSRTM Family of universal-input AC/DC off-line controllers for battery charger and adapter applications. It is designed for the flyback topology working in a discontinuous conduction mode DCM . In addition to being the industry’s most accurate primary side regulator, the ACT355A meets all of the global energy efficiency regulations CEC, European Blue Angel, and US Energy Star standards while using very few external components. ACT355A Micro Bridge Technology Co.,Ltd. ORDERING INFORMATION PART NUMBER TEMPERATURE RANGE PACKAGE PINS ACT355AUC-T -40°C to 85°C SOT23-5 PACKING METHOD TAPE & REEL TOP MARK PSRI PIN CONFIGURATION 5 VDD PSRI SOT23-5 ACT355AUC-T PIN DESCRIPTIONS PIN NUMBER PIN NAME PIN DESCRIPTION Feedback Pin. Connect to a resistor divider network from the auxiliary winding. Ground. No Connection. Switch Driver. Connect this pin to the emitter of the power NPN transistor or source of the power MOSFET. Power Supply. Micro Bridge Technology Co.,Ltd. ABSOLUTE MAXIMUM RATINGSc PARAMETER VDD to G Maximum Continuous VDD Current FB to G SW to G Continuous SW Current Maximum Power Dissipation derate above TA = Junction to Ambient Thermal Resistance Operating Junction Temperature Storage Temperature Lead Temperature Soldering, 10 sec VALUE to 20 to +6 to Internally limited 190 -40 to 150 -55 to 150 300 UNIT V mA V A W c Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability. ELECTRICAL CHARACTERISTICS VDD = 15V, VOUT = 5V, LP = 2mH, NP = 130, NS = 10, NA = 32, TA = 25°C, unless otherwise specified. PARAMETER SYMBOL TEST CONDITIONS VDD Turn-On Voltage VDD Turn-Off Voltage VDD OVP Trigger Voltage Supply Current Start Up Supply Current Clamp Switching Frequency VDDON VDDOFF VDDOVP IDD IDDST VDD Rising VDD Falling

PDF Datasheet Preview

ActivePSRTM Primary Switching Regulators
• Multiple Patent-Pending Primary Side

Regulation Technology
• No Opto-coupler
• Best Constant Voltage, Constant Current

Over All Accuracy
• Minimum External Components
• Integrated Line and Primary Inductance

Compensation
• Integrated Output Cord Resistance Compen-
sation
• Line Under-Voltage Protection
• Short Circuit Protection
• Over Temperature Protection
• Flyback Topology in DCM Operation
• Complies with all Global Energy Efficient

Regulations 0.3W Standby Power and CEC Average Efficiency
• SOT23-5 Package
• 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 ACT355A ensures safe operation with complete protection against all fault conditions. Built-in protection circuitry is provided for output shortcircuit, line under-voltage, and over-temperature conditions.

The ACT355A ActivePSR is optimized for costsensitive 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 optocoupler 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. These products achieve excellent regulation and transient response, yet requires less than 300mW of standby power.

The ACT355A is optimized for 2.5W to 3.5W applications such as 5V/500mA to 5V/700mA CV/CC chargers . It is available in a tiny SOT23-5 package.

Figure 1:

Typical Application Circuit

HIGH VOLTAGE DC
+ CV/CC

OUTPUT

The ACT355A belongs to the high performance, multiple patent-pending ActivePSRTM Family of universal-input AC/DC off-line controllers for battery charger and adapter applications. It is designed for the flyback topology working in a discontinuous conduction mode DCM . In addition to being the industry’s most accurate primary side regulator, the ACT355A meets all of the global energy efficiency regulations CEC, European Blue Angel, and US Energy Star standards while using very few external components.

ACT355A

Micro Bridge Technology Co.,Ltd.
ORDERING INFORMATION

PART NUMBER TEMPERATURE RANGE PACKAGE PINS

ACT355AUC-T
-40°C to 85°C

SOT23-5

PACKING METHOD

TAPE & REEL

TOP MARK

PSRI

PIN CONFIGURATION
5 VDD

PSRI

SOT23-5 ACT355AUC-T

PIN DESCRIPTIONS

PIN NUMBER

PIN NAME

PIN DESCRIPTION

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

Ground.

No Connection.

Switch Driver. Connect this pin to the emitter of the power NPN transistor or source of the power MOSFET.

Power Supply.

Micro Bridge Technology Co.,Ltd.

ABSOLUTE MAXIMUM RATINGSc

PARAMETER

VDD to G Maximum Continuous VDD Current FB to G SW to G Continuous SW Current Maximum Power Dissipation derate above TA = Junction to Ambient Thermal Resistance Operating Junction Temperature Storage Temperature Lead Temperature Soldering, 10 sec

VALUE
to 20
to +6 to Internally limited
190 -40 to 150 -55 to 150 300

UNIT

V mA V A W
c Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

VDD = 15V, VOUT = 5V, LP = 2mH, NP = 130, NS = 10, NA = 32, TA = 25°C, unless otherwise specified.

PARAMETER

SYMBOL TEST CONDITIONS

VDD Turn-On Voltage VDD Turn-Off Voltage VDD OVP Trigger Voltage Supply Current Start Up Supply Current Clamp Switching Frequency

VDDON VDDOFF VDDOVP

IDD IDDST

VDD Rising VDD Falling

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived ACT355AUC-T Datasheet file may be downloaded here without warranties.

Datasheet ID: ACT355AUC-T 522355