LED22V1A ETC, LED22V1A Datasheet

LED22V1A

Manufacturer Part Number

LED22V1A

Description

HIGH Efficiency LED Controller

Manufacturer

ETC

Datasheet

1.LED22V1A.pdf (4 pages)

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Download datasheet (210Kb)

Main Features: high efficiency, output current adjustable, high stability, small size, output short circuit

Specifications

Part number:

Input voltage:

Output voltage:

Maximum output current:

Efficiency:

Dimming control voltage:

Packaging:

Operating temperature:

Dimension:

Output Pin Description

Pin 1, SYNC

Pin 2, SDNG

Pin 3, VSW

Pin 4, 2.5V

Pin 5, LIS

Pin 6, GND

Pin 7, VPS

Pin 8, LEDA

Pin 9, LEDC

Applications

The LED22V1A2DW is a compact high efficiency LED controller. No heat sink is needed for operation.

The output current can be set either by an internal POT (Potentiometer) on the top side of the controller,

by an external POT, or an external DAC (Digital to Analog Converter). The voltage required for setting

the output LED current from 0 to 1A is 1.25V to 2.5V. I.e., when setting LIS (pin 5) to 1.25V or below,

the correspondent output LED current is 0; when setting to 2.5V (the reference voltage provided by the

controller), the output current is 1A.

550 E. Weddell Drive, Suite 4, Sunnyvale, CA 94089. U. S. A. Tel.: (408) 747-9760, Fax: (408) 747-9770. www.analogtechnologies.com

Analog Technologies, Inc.

protection, and low cost.

Digital input. It can be used to synchronize the LED controller switching frequency by an

external clock signal.

Digital input. It can be used to shut down the LED controller, has a negative logic: 0 =

shut down and 1 = turn on, and is internally pulled up. Leaving this pin unconnected

enables the LED controller.

Digital output. It can be used to synchronize other LED controllers as the clock signal

source. When used as the clock master unit, a higher switching frequency unit must be

ordered and the part number becomes: LED22V1A2DWM.

Analog output. The reference voltage of 2.5V used by the controller. It has a 20ppm/ C

drift and can provide 1mA current.

Analog input/output. It can be used to set the output LED current or indicate the voltage

for setting the output LED current. The relationship between this voltage and the output

current is: LED current = (LIS (V) – 1.25V)/1.25 (A). For example, when this voltage

equals to 2V, the output LED current is (2 – 1.25)/1.25 = 0.6A. The internal circuit is

shown in Figure 1.

Power input. Connect it to the power supply return terminal.

Power input. Connect it to the power supply positive terminal.

Analog output. Connect it to the LED’s positive terminal, the anode.

Analog output. Connect it to the LED’s negative terminal, the cathode.

HIGH EFFICIENCY LED CONTROLLER

LED22V1A2DW

7V to 22V

2V to power supply voltage – 1V

90% typical

1.25 to 2.5V

FR-4 PCB + epoxy

16mm

10 C to 85 C

16.7mm

6mm

LED22V1A2DW

1/4

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