AIC1896GK Просмотр технического описания (PDF) - Analog Intergrations

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AIC1896GK

1. 4MHz Thin Package Current-Mode Step-Up DC/DC Converter

Analog Intergrations 

AIC1896

1. 4MHz Thin Package

Current-Mode Step-Up DC/DC Converter

FEATURES

Fixed Frequency 1.4MHz Current-Mode PWM

Operation.

Adjustable Output Voltage up to 30V.

Guaranteed 13V/ 200mA Output with 5V Input.

2.5V to 10V Input Range.

Maximum 0.1µA Shutdown Current.

Programmable Soft-Start.

Tiny Inductor and Capacitors are allowed.

Space-Saving SOT-23-6 and TSOT-23-6

Package.

APPLICATIONS

White LED Backlight.

OLED Driver.

LCD Bias

DESCRIPTION

AIC1896 is a current-mode pulse-width modulation

(PWM), step-up DC/DC Converter. The built-in high

voltage N-channel MOSFET allows AIC1896 for

step-up applications with up to 30V output voltage,

as well as for Single Ended Primary Inductance

Converter (SEPIC) and other low-side switching

DC/DC converter.

The high switching frequency (1.4MHz) allows the

use of small external components. The Soft-Start

function is programmable with an external capacitor,

which sets the input current ramp rate.

The AIC1896 is available in a space-saving

SOT-23-6 and TSOT-23-6 package.

TYPICAL APPLICATION CIRCUIT

VIN

3.3V or

4.2V

C1

4.7µF

OFF ON

L

D1

CH521S-30

AIC1896

ZD1

BZV55-B12

11.8V~12.2V

6

IN

1

LX

4 SHDN FB 3

SS GND

5

2

R2

1KΩ

C2

0.033µF

C3

1µF

ILED

R1

62

86

84

82

80

78

VIN=4.2V

76

VIN=3.3V

74

72

L: GTSK-51-150M (15µH)

70

L: GTSK-51-100M (10µH)

68

2

4

6

8 10 12 14 16 18 20

LED Current (mA)

Fig. 1 Li-Ion Powered Driver for three white LEDs

Analog Integrations Corporation

Si-Soft Research Center

3A1, No.1, Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, R.O.C.

TEL: 886-3-5772500

FAX: 886-3-5772510 www.analog.com.tw

DS-1896G-01 121208

1

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