APPLICATIONS

FEATURES

DESCRIPTION

APPLICATION CIRCUIT

1

KB3386

Kingbor Technology Co.,Ltd

TEL:(86)0755-26508846 FAX:(86)0755-26509052

■ Output Current up to 400mA

■ Up to 94% Efficiency in Torch Mode

■ Automatic Softstart Limits Inrush Current

■ Adjustable FLASH Mode

■ x1 and x2 Automatic Modes for High Efficiency

■ Minimum External Components: No Inductors

■ High Frequency Operation: 2.4 MHz

■ Low 50mV Reference for low Loss Sensing

■ 1 A Shutdown Current

■ PWM Dimming Control

■ Automatic Switchover Between Buck/Boost

■ Overvoltage Protection on Output

■ Overcurrent/Temerature Protection

■ Low Ripple and EMI

■ Space Saving 10-pin 3mm x 3mm DFN

Package

The KB3386 is a current regulated charge pump ideal for

powering high brightness LEDs for camera flash applications.

The charge pump can be set to regulate two current levels for

FLASH and TORCH modes. The KB3386 automatically switches

modes between step-up and step-down ensuring that

LED current does not depend on the forward voltage. A low

current sense reference voltage (50mV) allows the use

of small 0603 current sensing resistors. The KB3386 is .

offered in 10-pin DFN package.

■ White LED Torch/Flash for Cell

Phones, DSCs, and Camcorders

■ Generic Lighting/Flash/Strobe

Applications

■ White LED Backlighting

Now Available in Lead Free Packaging

KB3386

10 Pin DFN

10

9

8

7

6

1

2

3

4

5

C1

C2

FLASH

EN

KB3386

ENABLE

TORCH/FLASH

C1

C2

FLASH

FB

2.2 F

(2.7 - 5.5V)

1 F

0.47 F

EN

400mA FLASH

106K

0.33

WLED

FB=150mV

400mA Buck/Boost Charge Pump LED Driver

10

9

8

7

6

1

2

3

4

5