Datasheet > EA4533BYH

EA4533BYH

更新时间： 2022-02-26 13:55:52

品牌	Logo	应用领域
技领 - ACTIVE-SEMI		/
页数	文件大小	规格书
17页	452K
描述
Wide-Input Sensorless CC/CV Step-Down DC/DC Converter

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数据手册

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EA4533BYH 数据手册

ACT4533A/B

Rev 0, 14-Aug-13

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

FEATURES

• 40V Input Voltage Surge

APPLICATIONS

• Car Charger/ Adaptor

• 36V Steady State Operation

• Up to 3.5A output current

• Output Voltage up to 12V

• Rechargeable Portable Devices

• General-Purpose CV/CC Power Supply

GENERAL DESCRIPTION

• 125kHz Switching Frequency Eases EMI Design

ACT4533A/B is a wide input voltage, high efficiency

ActiveCC step-down DC/DC converter that operates

in either CV (Constant Output Voltage) mode or CC

(Constant Output Current) mode. ACT4533A/B

provides up to 3.5A output current at 125kHz

switching frequency.

• 91% Efficiency (Vout=5V@2.4A at Vin=12V)

• Stable with Low-ESR Ceramic Capacitors to

Allow Low-Profile Designs

• Integrated Over Voltage Protection

• Excellent EMI Performance

ActiveCC is a patented control scheme to achieve

high-accuracy sensorless constant current control.

ActiveCC eliminates the expensive, high accuracy

current sense resistor, making it ideal for CLA

applications.

• Patented ActiveCC Sensorless Constant Current

Control Improves Efficiency and Lowers Cost.

• Resistor Programmable

− Current Limit from 1.5A to 4.0A

ACT4533A/B integrates adaptive gate drive to

achieve excellent EMI performance passing

EN55022 Class B EMC standard without adding

additional EMI components while maintaining high

conversion efficiency.

− Patented Cable Compensation from 0 to

0.25Ω

• ±7.5% CC Accuracy

− Compensation of Input /Output Voltage Change

− Temperature Compensation

− Independent of inductance and Inductor DCR

• 2% Feedback Voltage Accuracy

• Advanced Feature Set

− Integrated Soft Start

− Thermal Shutdown

− Secondary Cycle-by-Cycle Current Limit

− Protection Against Shorted ISET Pin

• SOP-8EP Package

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.

The only difference between ACT4533A and

ACT4533B is that Pin 7 provides OVP for

ACT4533A and EN/OVP for ACT4533B.

CC/CV Curve

6.0

V_IN= 24V

5.0

V_IN= 18V

4.0

3.0

V_IN= 12V

2.0

1.0

0.0

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

Output Current (A)

Innovative Power^TM

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