TECHNICAL DATA

1

2011, February, Ver. 01

HIGH-VOLTAGE LED DRIVER

WITH BUILD-IN MOSFET SWITCH

FEATURES

▪ Operating temperature range -40 ..

+85 ºС

▪ ON-resistance of the MOSFET switch

210 Ohm for a

mbient temperature 25 ºС

▪ OFF-state breakdown voltage of the

MOSFET switch not less 500 V for

Ambient

temperature 25 ºC.

ORDERING INFORMATION

Device

Operating

Temperature Range

Package

Packing

IL9921LF, IL9922LF, IL9923LF

TO-92

Tape

IL9921PT, IL9922PT, IL9923PT

SOT-89

Tape & Reel

DESCRIPTION

IL9921, IL9922, IL9923 are high-voltage LED driver control ICs with build-in MOSFET switch

and purposed for LED lighting control.

They allow efficient operation of LED strings from voltage sources ranging up to 400VDC.

The IL9921/22 includes an internal high-voltage switching MOSFET controlled with fixed off-time

TOFF of approximately 10µs. The LED string is driven at constant current, thus providing constant

light output and enhanced reliability. The output current is internally fixed at 20mA for IL9921,

50mA for IL9922 and 30mA for IL9923. The peak current control scheme provides good regulation

of the output current throughout the universal AC line voltage range of 85 to 264V AC or DC input

voltage of 20 to 400V.

PIN DESCRIPTION

Pin No

Symbol

Description

1

Drain

This is a drain terminal of the output switching MOSFET and a

linear Regulator input.

2

GND

This is a common connection for all circuits

3

This is a power supply pin for all control circuits.

Bypass this pin with a 0.1uF low impedance capacitor.

IL9921/22/23

2. GND

1.Drain

2.

1

2

3

1.Drain

2.GND

SOT-89

TO-92