FEATURES
High Efficiency: ≥90%
Constant Current Output
Maximum Output Current: 500mA
Current Output Noise: 2.41μAP-P @ 0.1Hz-10Hz
High Stability: 100ppm/°C
PWM Switching Frequency Synchronizable
Zero EMI
Compact Size
100 % Lead (Pb)-free and RoHS Compliant
DIP Package Available

DESCRIPTION
This laser driver is an electronic module designed for
driving diode lasers with up to 500mA constant current,
high efficiency, low noise, high reliability, zero EMI, and
small package. Figure 1 shows the photo of actual
ATLS500MA202D.
It provides these the functions: laser constant current control,
laser current monitoring, over current and thermal protection,
switching frequency synchronization, 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) to monitor the laser output current and/or set laser
output current respectively.
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.
The ATLS500MA202D is packaged in a 6 sided metal
enclosure, which blocks EMIs (Electro-Magnetic Interferences)
to prevent the driver and other electronics from interfering each
other.
Figure 2 is the actual size top view of the ATLS500MA202D,
which shows the pin names and locations. Its thickness is
5.0mm.