ACT4523_12 datasheet(1/15 Pages) ACTIVE-SEMI

部件名	ACT4523

功能描述	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter

PDF	15 Pages

Scroll/Zoom	100%

制造商	ACTIVE-SEMI [Active-Semi, Inc]

网页	http://www.active-semi.com

标志

1 / 15 page

Innovative Power

TM

- 1 -

www.active-semi.com

FEATURES

• 40V Input Voltage Surge

• 38V Steady State Operation

• Up to 3A output current

• Output Voltage up to 12V

• Patent Pending Active CC Sensorless Constant

Current Control

− Integrated Current Control Improves

Efficiency, Lowers Cost, and Reduces

Component Count

• Resistor Programmable

− Current Limit from 1.5A to 3A

− Patented Cable Compensation from 0Ω to

0.3Ω

• ±7.5% CC Accuracy

− Compensation of Input /Output Voltage Change

− Temperature Compensation

− Independent of inductance and Inductor DCR

• 2% Feedback Voltage Accuracy

• Up to 94% Efficiency

• 225kHz Switching Frequency Eases EMI Design

• Advanced Feature Set

− Integrated Soft Start

− Thermal Shutdown

− Secondary Cycle-by-Cycle Current Limit

− Protection Against Shorted ISET Pin

• SOP-8EP Package

APPLICATIONS

• Car Charger/ Adaptor

• Rechargeable Portable Devices

• General-Purpose CC/CV Supply

GENERAL DESCRIPTION

ACT4523 is a wide input voltage, high efficiency

Active CC step-down DC/DC converter that

operates in either CV (Constant Output Voltage)

mode or CC (Constant Output Current) mode.

ACT4523 provides up to 3A output current at

225kHz switching frequency.

Active CC is a patent-pending control scheme to

achieve highest accuracy sensorless constant

current control. Active CC eliminates the expensive,

high accuracy current sense resistor, making it ideal

for battery charging applications and adaptors with

accurate current limit. The ACT4523 achieves

higher efficiency than traditional constant current

switching regulators by eliminating its associated

power loss.

Protection features include cycle-by-cycle current

limit, thermal shutdown, and frequency foldback at

short circuit. The devices are available in a SOP-

8EP package and require very few external devices

for operation.

ACT4523

Wide-Input Sensorless CC/CV Step-Down DC/DC Converter

Rev 5, 14-Nov-12

Output Current (A)

0

0.4

0.8

1.2

1.6

2.0

2.4

2.8

3.2

6.0

5.0

4.0

3.0

2.0

1.0

0.0

CC/CV Curve

VIN = 24V

VIN = 12V

ACT4523

HSB

IN

EN

COMP

FB

SW

ISET

ENABLE

Input 10V to 40V

5V

GND

C1

47µF

R1

11.5k

C2

2.2nF

R3

8.2k

R4

10k

D1

SK34

R2 52k

C4

220µF

C3

22nF

50V

L1 30µH

类似零件编号 - ACT4523_12

制造商	部件名	数据表	功能描述
Active-Semi, Inc	ACT4523	658Kb / 15P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 7, 01-Aug-13

More results

类似说明 - ACT4523_12

制造商	部件名	数据表	功能描述
Active-Semi, Inc	ACT4513	664Kb / 15P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 6, 29-Jul-11
	ACT4514	472Kb / 16P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 1, 21-Jul-11
	ACT4513	673Kb / 15P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 7, 14-Nov-12
	ACT4515	463Kb / 16P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 6, 14-Nov-12
	ACT4513	678Kb / 16P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 7, 14-Nov-12
	ACT4515	462Kb / 17P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 6, 14-Nov-12
	ACT4533	602Kb / 16P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 1, 25-Feb-13
	ACT4533A	452Kb / 18P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 0, 14-Aug-13
	ACT4523A	400Kb / 15P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 0, 25-Jul-13
	EA4533BYH	452Kb / 17P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 0, 14-Aug-13

More results

ACT4523 数据表(PDF) 1 Page - Active-Semi, Inc

ACT4523 数据表(HTML) 1 Page - Active-Semi, Inc

类似零件编号 - ACT4523_12

类似说明 - ACT4523_12

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链接网址

ACT4523 数据表(PDF) 1 Page - Active-Semi, Inc

ACT4523 数据表(HTML) 1 Page - Active-Semi, Inc

类似零件编号 - ACT4523_12

类似说明 - ACT4523_12

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