Data Sheet

WLMDU9456001JT / 172946001

MagI

C Power Module

LDHM - LED Step Down High Current Module

We-online.com Würth Elektronik eiSos GmbH & Co. KG – Data Sheet Rev. 1.0

PACKAGE

LED+

DIM

AGND

ISET

IFIX

LED-

Exposed Pad = PGND

Connect to AGND

Top view

MARKING DESCRIPTION

Marking

Description

WE Würth Elektronik trade name

Y Year

M Month

LLLL Lot trace code

G3 Lead finish code per JEDEC norm (green 3 mat sin)

WE201 Part identifier

PIN DESCRIPTION

SYMBOL PIN # TYPE PIN DESCRIPTION

LED+ 1, 2 Power

Supply input and rail connection to the anode of the LED string.

DIM 3 Input

Dimming control signal input. Left floating enables the driver. Optional: apply a logic

level PWM signal to control the brightness of the LED string.

AGND 4 Supply

The analog ground pin is the reference point for all stated voltages and must be

connected to the exposed pad (EP) externally.

ISET 5 Input

Connect a resistor between this pin and GND to adjust the LED current up to

450mA. If the default LED current of 350mA is desired, leave this pin floating.

IFIX 6 Input

Connect this pin to GND to set the default LED current of 350mA. In case a different

value of LED current is required, leave this pin floating.

LED- 7 Power The current return pin of the LED string. Connect to the cathode of the LED string.

PGND EP Power

Exposed Pad. Connect to copper plane(s) with thermal vias for thermal

performance. Must be electrically connected to pin 4.

Package marking

YMLLLLG3

WE201