AIC1563 Ver la hoja de datos (PDF) - Analog Intergrations

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componentes Descripción

Fabricante

AIC1563

Versatile DC/DC Converter

Analog Intergrations 

FEATURES

3V to 30V Input Voltage Operation.

Internal 2A Peak Current Switch.

1.5A Continuous Output Current.

Bootstrapped Driver.

High Side Current Sense Capability.

High Efficiency (up to 90%).

Internal ±2% Reference.

Low Quiescent Current at 1.6mA.

Frequency Operation from 100Hz to 100KHz.

APPLICATIONS

Constant Current Source for Battery Chargers.

Saver for Cellular phones.

Step-Down DC-DC Converter Module.

AIC1563

Versatile DC/DC Converter

DESCRIPTION

The AIC1563 is a monolithic control circuit

containing the primary functions required for DC

to DC converters and highside-sensed constant

current source. The device consists of an inter-

nal temperature compensated reference, com-

parator, controlled duty cycle oscillator with an

active current sense circuit, bootstrapped driver,

and high current output switch. This device is

specifically designed to construct a constant

current source for battery chargers with a mini-

mum number of external components. Boot-

strapped driver can drive the NPN output switch

to saturation for higher efficiency and less heat

dissipation. The AIC1563 can deliver 1.5A con-

tinuous current without requiring a heat sink.

TYPICAL APPLICATION CIRCUIT

R1

1K

D2

R2

120

3C

1µF

1N1418

VIN

+ 220µF

C1

CT

DC

DE

CF

GND

BOOST

IS

VCC

FB

AIC1563

D3

220µH 1N5819 *RS

IO

L

D1

1N5821

220µF

+

CO

+

C5

10µF

RB

RA

33K

5.6K

*IO=300mV/RS

(%)

100

90

80

70

0

VIN= 1 6 V, VO= 1 2 V

VIN= 1 6 V, V O= 8 V

0.5

1

1.5

2

Io (A)

Efficiency vs Output Current

Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC

DS-1563-01 Jan 30, 01

TEL: 886-3-5772500 FAX: 886-3-5772510

www.analog.com.tw

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