Datasheet > ACT4533

ACT4533

更新时间： 2025-10-31 01:13:59

品牌	Logo	应用领域
技领 - ACTIVE-SEMI		/
页数	文件大小	规格书
16页	602K
描述
Wide-Input Sensorless CC/CV Step-Down DC/DC Converter

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中文翻译

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ACT4533 数据手册

ACT4533

Rev 1, 25-Feb-13

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

FEATURES

• 40V Input Voltage Surge

• 32V Steady State Operation

• Up to 3A Output Current

APPLICATIONS

• Car Charger/ Adaptor

• Rechargeable Portable Devices

• General-Purpose CC/CV Supply

• Constant Current Output with Input up to 32V

• Output Voltage up to 12V

• 125kHz Switching Frequency Eases EMI Design

• Good EMI Performance to Pass EN55022

Radiation Regulation without adding EMI

Components

GENERAL DESCRIPTION

ACT4533 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.

ACT4533 provides up to 3A output current at

125kHz switching frequency.

• Patent Pending Active CC Sensorless Constant

Current Control

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 ACT4533 achieves

higher efficiency than traditional constant current

switching regulators by eliminating its associated

power loss.

− Integrated Current Control Improves

Efficiency, Lowers Cost, and Reduces

Component Count

• Resistor Programmable

− Current Limit from 1.5A to 3A

− Patented Cable Compensation from 0 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 92% Efficiency

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.

• Advanced Feature Set

− Integrated Soft Start

− Thermal Shutdown

− Secondary Cycle-by-Cycle Current Limit

− Protection Against Shorted ISET Pin

• SOP-8EP Package

CC/CV Curve

6.0

V_IN= 24V

5.0

4.0

V_IN= 18V

3.0

V_IN= 12V

2.0

1.0

0.0

400

800

1200 1600 2000 2400 2800

Output Current (mA)

Innovative Power^TM

- 1 -

www.active-semi.com

12 3 4 5 6 7...16

中文翻译

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与ACT4533相关器件

型号	品牌	获取价格	描述	数据表
ACT4533A	ACTIVE-SEMI	获取价格	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
ACT4533AYH-T	ACTIVE-SEMI	获取价格	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
ACT4533B	ACTIVE-SEMI	获取价格	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
ACT4533BYH-T	ACTIVE-SEMI	获取价格	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
ACT4533C	ACTIVE-SEMI	获取价格	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
ACT4533CYH-T	ACTIVE-SEMI	获取价格	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
ACT4533YH-T	ACTIVE-SEMI	获取价格	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
ACT4533YH-T1026	ACTIVE-SEMI	获取价格	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
ACT45B	TDK	获取价格	Common Mode Filters SMD
ACT45B	EPCOS	获取价格	ACT45B common-mode chokes for CAN bus systems

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