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Analog Technologies

ATLS100MA104

Low Noise Constant Current Laser Controller

APPLICATIONS

Figure 5.1 shows the SBDN external circuit; If SBDN logic is high in default, at that time, the controller has a 1.5M pull-up

resistor internally, with the part number ATLS100MA104. Figure 5.2 shows a typical application circuit. If SBDN logic is low

in default, at that time, the controller has a 1.5M pull-down resistor internally, with the part number ATLS100MA104-PD.

Figure 5.3 shows the SBDN external circuit. W1 and W2 set the output current limit and output current respectively. Resistor

R1 and capacitor C1 form a low pass filter, to lower the noise from the voltage reference.

Laser diode is connected between LDA and LDC. It is worth mentioning that the power supply return terminal should be

connected to the pin 11 PGND and the cathode of the laser diode should be connected to the pin 10 LDC. These 2 nodes should

not be connected together externally and they are connected together internally already by the controller.

Figure 5.1. Typical Stand-alone CW Operation Schematic for ATLS100MA104

Figure 5.2. Typical Stand-alone CW Operation Schematic for ATLS100MA104-PD