OverVoltage Function

Fast 1.2MHz Switching Frequency

Requires Only 0.22uF Output Capacitor

Inherently Matched LED Current

High Efficiency: 85% Typical

Drives Up to Four series LEDs with a Li-lon cell

Uses Very Tiny Inductors

SOT-26 Package

LR246

is

a

step-up

DC/DC

converter

specifically designed to drive white LED with a

constant current. It can drive two,three,or four

LEDS. It switches at 1.2MHz and use tiny

external components. The output capacitor can

be as small as 0.22uF,which can save space

and cost versus alternative solutions. Feedback

voltage is as low as 95mV. Built-in OverVoltage

function.

Absolute maximum ratings

Parameter

symbol

value

unit

Supply Voltage

10

V

Feedback Voltage

FB

10

V

Switch Voltage

SW

20

V

CE Voltage

10

V

Operating temperature range

-25 to +70

℃

Storage temperature range

-55 to +150

℃

Junction temperature

125

℃

Pin name

Description

Symbol

Description

Symbol

1：

Switch

SW

6：Supply

Voltage

VIN

2：GND

GND

5：Over

Voltage

OVP

1

2

3

4

5

6

3：Feedback

FB

4：Start-Up

CE

LESHAN RADIO COMPANY, LTD.

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