SS6896CGTR datasheet(1/12 Pages) SSC

Part #	SS6896CGTR

Description	1.4MHz Current-Mode Step-Up DC/DC Converter

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Manufacturer	SSC [Silicon Standard Corp.]

Direct Link	http://www.siliconstandard.com

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SS6896

Rev.2.01 6/06/2003

Features

l

Fixed-frequency 1.4MHz Current-Mode PWM

operation.

l

Adjustable output voltage up to 30V.

l

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

l

Input Range 2.5V to 10V.

l

Maximum 0.1µA shutdown current.

l

Programmable soft-start.

l

Works with tiny inductors and capacitors

l

Space-s aving SOT-23-6 package.

Applications

l

White LED Backlight.

l

OLED Driver.

Description

The

SS6896

is

a

current-mode

pulse-width

modulation (PWM), step-up DC/DC converter. The

built-in high-voltage N-channel MOSFET allows the

SS6896 to support applications with up to 30V output

voltage, as well as Single-Ended Primary Inductance

Converters (SEPIC) and other low-side switching

DC/DC converters.

The high switching frequency (1.4MHz) permits the

use of small external components. The soft -start

function is programmable with an external capacitor,

which sets the input current ramp rate.

The SS6896 is available in a space-saving SOT-23-6

package.

Typical Application Circuits

LX

FB

GND

SS

SHDN

IN

SS6896

L

D1

CH521S -30

C2

0.033µF

R1

C1

4.7µF

ON

OFF

C3

1µF

ILED

VIN

ZD1

11.8V~12.2V

BZV55 -B12

R2

1KΩ

3.3V or

4.2V

6

4

1

3

5

2

68

70

72

74

76

78

80

82

84

86

2

4

6

8

10

12

14

16

18

20

LED Current (mA)

L: GTSK -51-100M (10µH)

L: GTSK-51-150M (15µH)

VIN=3.3V

VIN=4.2V

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

LX

FB

GND

SS

SHDN

IN

SS6896

L

D1

CH521S-30

C2

0.033

µF

C1

4.7µF

ON

OFF

C3

1

µF

VIN

23.5V~24.5V

BZV55 -B24

R2

1K

Ω

3.6V or

4.2V

ILED

ZD1

R1

6

4

1

3

5

2

LED Current (mA)

60

62

64

66

68

70

72

74

76

78

80

2

4

6

8

10

12

14

16

18

20

VIN=3.6V

VIN=4.2V

L: GTSK -51-100M (10µH)

L: GTSK-51-150M (15µH)

Fig. 2 Li-Ion Powered Driver for six white LEDs

1.4MHz Current-Mode Step-Up DC/DC Converter

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