FEATURES
High Efficiency: ≥90%
Constant Current Output
Maximum Output Current: 2A
Current Output Noise: 3.71μAP-P @ 0.1Hz-10Hz
High Stability: 100ppm/°C
PWM Switching Frequency Synchronizable
Zero EMI
Compact Size
DIP Package Available
100 % Lead (Pb)-free and RoHS Compliant
SMT Package Available
DESCRIPTION
This laser driver is an electronic module designed for
driving diode lasers with up to 2A constant current, high
efficiency, low noise, high reliability, zero EMI, and small
package. Figure 1 shows physical photo of ATLS2A202D.
It provides these the functions: laser constant current control,
laser current monitoring, over current and thermal protection,
laser current output indication, laser diode status indication,
soft start, and shut down.
It comes with a high stability low noise 2.5V voltage reference
output which can be used for setting the output current. The
reference output can also be used for the ADCs (Analog to
Digital Converters) and/or DACs (Digital to Analog
Converters).
The frequency synchronization of this laser driver allows using
an external digital signal to synchronize the internal PWM
output stage of the laser driver, to eliminate frequency beating
interferences between the laser drivers and other switch mode
electronic circuits on the same PCB.
The external signal needs to be in the range of 520kHz to
800kHz.
If other frequency is needed, contact us, we may be able to
adjust the internal PWM frequency for you. The default
switching frequency of the internal PWM output stage is
500kHz.