1161 Ringwood Ct, #110, San Jose, CA 95131, U. S. A. Tel.: (408) 748-9100, Fax: (408) 770-9187

www.analogtechnologies.com

Copyrights 2000-2022, Analog Technologies, Inc. All Rights Reserved. Updated on 7/4/2022

Email: staff@analogti.com/sales@analogti.com

3

Analog Technologies

ATLS3A212DHS

High Voltage Constant Current 3A Laser Driver

6

LISL

Analog Input

Laser current low value setting voltage. There is a10M

Ω input resistor tied to GND. Setting

it from 0V to 2.5V will set the laser lower current from 0 to 3A linearly. The current set by

this pin can be higher than the current set by the LISH port on pin 7, the reason calling it

"low" is because when PCN, pin 3, is low, the laser driver will output the current set by this

pin. The input bias current of this pin is < 0.1

μA, in addition to the 10MΩ resistor tied to

GND. The maximum input voltage on this pin is 4V. It is recommended to use the 2.5VR

port, pin 5, as the voltage source for setting the output current.

7

LISH

Analog Input

Laser current high value setting voltage. For this pin, everything is the same as above

except that this pin sets the output current when PCN, pin 3 is high.

8

LIO

Analog Output

Laser Current Output indication. 0V to 2.5V indicates the laser current being from 0 to 3A

linearly.

9

TMO

Analog Output

Temperature Output pin. This pin indicates the controller temperature. The relationship

between the output voltage and the temperature is: 2.55V (

−40°C) ~ 1.2V (85°C).

10

LDA

Analog Output

Laser Diode Anode. Connect it to the laser diode anode terminal. The maximum current of

this pin can go up to 3A. When designing layout, do not use a thin and long PCB track,

otherwise, the inductance might be too high and oscillation may occur.

11

LDC

Analog Output

Laser Diode Cathode. Connect it to the laser diode cathode terminal. The current on this pin

can go up to 3A. Use thick and short PCB track for this pin to minimize the inductance to

avoid oscillation or ringing. This pin has a low voltage potential, when the output current is

3A, the potential is 75mV above PGND.

12

PGND

Power Ground

Power ground pin. Connect this pin directly to power supply return path line, 0V. The

maximum current on this pin can go up to 3A.

13

VPS

Power Input

can go up to 3A.

14

SYNO

Digital Output

Synchronization Output. This is a digital output signal with internal impedance of 100

Ω by

passed by 1.5MHz low pass filter. This output is triggered by the PWM output stage of this

laser driver and can be used to synchronize other switch mode electronics to avoid the

beating interference with their free-run frequencies if their free-run frequencies are close to

500kHz. If the free-run frequency of the other electronics is far away from 500kHz, this pin

may be left unconnected.