ACT4501 datasheet(1/16 Pages) ACTIVE-SEMI

部品番号	ACT4501

部品情報	1.25A CC/CV Step-Down DC/DC Converter

PDF	16 Pages

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メーカー	ACTIVE-SEMI [Active-Semi, Inc]

ホームページ	http://www.active-semi.com

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Innovative Power

TM

- 1 -

www.active-semi.com

FEATURES

• 10V-30V Input Voltage

• 40V Transparent Input Voltage Surge

• Up to 1.25A Constant Output Current

• Output Voltage up to 12V

• Good EMC Performance on Single Layer PCB

• Patent Pending ActiveCC Constant Current

Control

− Integrated Current Control Improves

Efficiency, Lowers Cost, and Reduces

Component Count

• Resistor Programmable Outputs

− Current Limit from 500mA to 1250mA

Patented cable compensation from DC Cable

Compensation from 0Ω to 0.5Ω

• 2% Feedback Voltage Accuracy

• Up to 90% Efficiency

• 125kHz 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-8 Package

APPLICATIONS

• Car Charger

• Rechargeable Portable Devices

• General-Purpose CC/CV Power Supply

GENERAL DESCRIPTION

ACT4501 is a dedicated cost-effective DC-DC

converter for 5V/1A car charger applications with a

wide input voltage and high efficiency. The

converter operates in either CV (Constant Output

Voltage) mode or CC (Constant Output Current)

mode. ACT4501 provides up to 1.25A output

current at 125kHz switching frequency.

ActiveCC is a patent-pending control scheme to

achieve high accuracy sensorless constant current

control. ActiveCC eliminates the expensive, high

accuracy current sense resistor, making it ideal for

battery charging applications and high-brightness

LED drive for architectural lighting. The ACT4501

achieves higher efficiency than traditional constant

current switching regulators by eliminating the

sense resistor and 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-8

package and require very few external devices for

operation.

ACT4501

1.25A CC/CV Step-Down DC/DC Converter

Rev 2, 14-Nov-12

Load Current (mA)

10

100

1000

10000

1

100

90

80

70

60

50

40

Efficiency vs. Load Current

VIN = 12V

VOUT = 5V

VIN = 24V

VIN = 16V

同様の部品番号 - ACT4501

メーカー	部品番号	データシート	部品情報
Active-Semi, Inc	ACT4501	467Kb / 15P	1.25A CC/CV Step-Down DC/DC Converter Rev 2, 14-Nov-12
Active-Semi, Inc	ACT4501SH-T	467Kb / 15P	1.25A CC/CV Step-Down DC/DC Converter Rev 2, 14-Nov-12

More results

同様の説明 - ACT4501

メーカー	部品番号	データシート	部品情報
Active-Semi, Inc	ACT4514	472Kb / 16P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 1, 21-Jul-11
	ACT4303	622Kb / 15P	30V/3A Sensorless CC/CV Step-Down DC/DC Converter Rev 0, 05-Dec-11
	ACT4501	467Kb / 15P	1.25A CC/CV Step-Down DC/DC Converter Rev 2, 14-Nov-12
	ACT4513	678Kb / 16P	Wide-Input Sensorless CC/CV Step-Down DC/DC Converter Rev 7, 14-Nov-12
	EA4501SH	467Kb / 15P	1.25A CC/CV Step-Down DC/DC Converter Rev 2, 14-Nov-12
Shenzhen Huazhimei Semi...	HM4523	662Kb / 8P	42V 3A CC/CV Step-Down DC/DC Converter
	HM4533A	622Kb / 8P	42V 3A CC/CV Step-Down DC/DC Converter
	HM4533A-E	622Kb / 8P	42V 3A CC/CV Step-Down DC/DC Converter
	HM4523-E	662Kb / 8P	42V 3A CC/CV Step-Down DC/DC Converter
AiT Semiconductor Inc.	A7330	665Kb / 14P	DC-DC CONVERTER BUCK (STEP-DOWN) SENSORLESS CC/CV REV2.0