| Item# | LD1100 | LD1101 | EK1101* | EK1102* |
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| Output Current | 0 - 250 mA | | Supported Laser Pin Configurations | A, B, D, & F | C, D, & F | A | B | | Recommended for LEDs** | No | No | Yes | Yes | | Output Control | 12-Turn Power Adjustment (On-Board) | | Output Stability | 1.5% | | Output Noise | 5 μA RMS | | Feedback Gain | Adjustable | | Monitor Current Range | 5 μA to 5 mA | | Operating Voltage | 8 to 12 VDC | | Quiescent Current | 9 mA | | Dimensions | 1" x 1.5"
12-Pin SIP Package | See Drawing | | ESD Protection | 100 ms Slow Start | | Max Output Voltage | ~6.5 V (with a 12 V Power Supply) |
* The EK1101 and EK1102 can be used with pin configurations D and F if the included socket is replaced with a suitable 4-pin socket. The socket must be wired correctly in order to support the pin style.
** With monitor photodiode. Laser Diode Drivers
The LD1100 and LD1101 Laser Diode Drivers are constant-power laser driver modules that support common laser anode and common laser cathode pin configurations. They feature an on-board 12-turn trim pot for continuous laser power output adjustment, pin-programmable feedback gain, ON/OFF control input, and a current monitor output for observing the laser drive current. With dimensions of only 1" x 1.5", they are compact and can be embedded into custom designs. The compliance voltage, which is the maximum output voltage, is ~6.5 V for the LD1100 and LD1101 when using a 12 V power supply. All input and output signals are provided on a 12-pin SIP connector, which allows simple integration into a printed circuit design. The LD1100 and LD1101 can drive lasers up to 250 mA in a constant-power mode. Either uses the internal monitor photodiode for a feedback signal into a proportional-integral feedback loop to stabilize the output power to within 1.5%. To accommodate a wide range of laser diodes, the feedback gain can be set by using jumpers between any combination of the five gain setting resistor pins to the power supply common. This allows lasers with monitor currents over a range from 5 μA to 5 mA to be used with a single driver. Evaluation Kits
The EK1100 Series Evaluation Kit is an LD1100 Laser Driver soldered to a PCB that features an on/off switch and a dip switch bank for controlling the gain on the feedback signal. A 3-pin laser socket cable (S8060) is also soldered onto the PCB board (this determines the pin configuration supported by the kit). In addition to driving lasers, the EK1101 and EK1102 are also suggested for operating LEDs that contain a monitor photodiode with an A or B style pin configuration, respectively. Power Supply Options
A power supply cable for 9 V batteries is included but not attached. Alternatively, our LDS9 power supply can be used. Supported Pin Configurations 
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Constant Power LD Controller (Kits Available)
