Wavelength 公司的FL500是低功耗激光二极管驱动器,工作电压从3V到12V,有两个单独的250mA驱动器或单个500mA驱动器.和A型或B型激光二极管兼容,采用恒流(CC)模式. FL500具有500 kHz正弦波恒流带宽或100kHz方波带宽.本文介绍了FL500的主要特性,方框图以及单电源两个独立驱动器应用电路, 并联用作单个驱动器应用电路和多个FL500并联应用电路图.此外还介绍了评估板FL591FL的主要特性,方框图和详细电路图.

    The FL500 is ideal for driving low power laser diodes. It operates from 3 to 12V, so is compatible with Li+ battery operation. It can be configured as two totally independent 250mA drivers or a single 500 mA driver. Compatible with Type A or B laser diodes.

    The FL500 allows for quick and easy operation in Constant Current (CC) mode. For simple CC mode operation the only components that are required are a power supply, an analog control voltage, your laser and optional filtering circuitry.

    FL500主要特性:

    Small Package (0.75” x 0.45” x 0.255”)

    Low Cost

    Brownout Protection

    12-pin, SMT package, Reflow Compatible

    Slow Start Laser Diode Protection

    Drive Up to 500 mA Output Current

    Can be configured as two 250mA drivers

    Voltage Controlled Setpoint

    TTL Compatible Shutdown Pin

    Adjustable Current Limit on Eval boards

    Adjustable Current Range Output

    500 kHz sinewave Constant Current Bandwidth (100kHz square wave)

    图1.FL500方框图

    图2.单电源两个独立驱动器应用电路(VS = VDD)

    图3.并联用作单个驱动器应用电路

    图4.多个FL500并联应用电路图

    FL500激光二极管评估板FL591FL

    FL500 Laser Diode Driver Evaluation Board Use the FL591FL Evaluation Board to rapidly prototype a laser diode control system using the cutting edge technology of the FL500 Laser Diode Driver. Onboard switches, connectors, and trimpots make configuration and operation simple. Input and output cables are included.

    Operate the FL500 as two independent 250 mA channels or in parallel as one 500 mA driver.

    Switches set operation in either constant current (CC) or constant power (CP) mode. A trimpot sets the laser diode forward current limit. The input cables allow easy connection to your power supply and monitoring equipment while the output cables quickly connects to your laser diode and monitor photodiode.

    评估板FL591FL主要特性:

    Operates A or B type Laser Diodes

    Configure as two independent 250 mA output channels or one 500 mA driver.

    Constant Current or Constant Power Operation

    Adjustable Current Limit

    Enable/Disable Switch, and LED status indication

    Includes Input/Output Cable Set (18”)

    FL500 is Reflow Oven Compatible

    图5.评估板FL591FL外形图

    图6.评估板FL591FL方框图

    图7.评估板FL591FL电路图