ACT4455 datasheet(1/16 Pages) ACTIVE-SEMI

部件名	ACT4455

功能描述	36V/5A Step Down DC/DC Converter

PDF	16 Pages

Scroll/Zoom	100%

制造商	ACTIVE-SEMI [Active-Semi, Inc]

网页	http://www.active-semi.com

标志

1 / 16 page

Innovative Power

TM

- 1 -

www.active-semi.com

FEATURES

• 7.5V to 36V Input Voltage

• 40V Input Voltage Surge

• Up to 5A Output Current

• Up to 12V Output Voltage

• Dual Outputs with Independent Over Current

Protection

• 7.5% Accurate Over Current Protection (OCP)

• Integrated 45mΩ High Side Power FET

• 90% Efficiency at Heavy Load

• Internal 3ms Soft Startup

• Low Standby Input Current

• Sleeping Mode at OCP, OTP and SCP

• Zero Input and Output Currents at Over Current

and Short Circuit Protection

• Auto Recovery into Full Load after Faults

• Output Cord Voltage Drop Compensation

• Stable with Low ESR Ceramic Output Capacitors

• Internal Cycle-by-Cycle Current Control

• Programmable Over Current Setting

• SOP-8EP Package

APPLICATIONS

• Automotive Industry

• Dual-Output Car Charger

• LCD-TV

GENERAL DESCRIPTION

ACT4455 is a wide input voltage step-down DC/DC

converter with high-side MOSFET integrated. It

provides up to 5A continuous output current at

200kHz switching frequency. The converter can be

configured as single output or dual outputs with

independent over current protection. The converter

achieves high efficiency and excellent load and line

regulation. The converter enters into hiccup and

sleeping

mode

and

the

converter

power

consumption is nearly zero when output is

overloaded or shorted to ground. Other protection

features includes cycle-by-cycle current limit, under

voltage protection and thermal shutdown. The

device is available in SOP8-EP package.

ACT4455

36V/5A Step Down DC/DC Converter

Rev 2, 21-Nov-12

Efficiency (%)

0

1000

2000

3000

4000

5000

90

80

70

60

50

100

Efficiency vs. Load current

VIN = 24V

VIN = 12V

VIN = 32V

类似零件编号 - ACT4455

制造商	部件名	数据表	功能描述
Aeroflex Circuit Techno...	ACT4455	126Kb / 8P	ACT 4455 / 4459 SINGLE SUPPLY TRANSCEIVERS FOR MIL-STD-1553/1760
Active-Semi, Inc	ACT4455	674Kb / 15P	36V/5A Step Down DC/DC Converter Rev 2, 21-Nov-12
Active-Semi, Inc	ACT4455YH-T	674Kb / 15P	36V/5A Step Down DC/DC Converter Rev 2, 21-Nov-12

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类似说明 - ACT4455

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Active-Semi, Inc	ACT4455	674Kb / 15P	36V/5A Step Down DC/DC Converter Rev 2, 21-Nov-12
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