IL9921 datasheet(4/6 Pages) IKSEMICON

Part #	IL9921

Description	HIGH-VOLTAGE LED DRIVER

PDF	6 Pages

Scroll/Zoom	100%

Manufacturer	IKSEMICON [IK Semicon Co., Ltd]

Direct Link	http://www.iksemi.com/en/index.html

Logo

4 / 6 page

IL9921/IL9922/IL9923

2011, February, Ver. 01

RECOMMENDED APPLICATION DIAGRAM

– AC supply voltage source

С1 – capacitor C= 0.1uF ± 10 %

– microcircuit

– inductor (coil)

Inductor feature L, mH, is calculated by formula:

L =



– Quantity of diodes in LED string, pcs.;

VF – LED forward voltage for nominal current, V;

dIO – LED circuit permissible current ripple, mA

LED1 – LEDN – LEDs (light emitting diodes) with nominal current:

- 20 mA for IL9921 application;

- 50 mA for IL9922 application;

- 30 mA for IL9923 application

VD1

– high-voltage diode with breakdown voltage not less 500V

and forward current:

- not less 25.5 mA for IL9921 application;

- not less 63.0 mA for IL9922 application;

- not less 38.2 mA for IL9923 application

IL9921 Datasheet(PDF) 4 Page - IK Semicon Co., Ltd