Wavelength Electronics LDTC0520 Manual

Also see for LDTC0520: DATASHEET AND OPERATING GUIDE DATASHEET AND OPERATING GUIDE

Wavelength Electronics LDTC0520 Manual Manual pdf 1 page image

LDTC0520 / LDTC1020 Combination Laser DIode Driver and Temperature Controllerwww.teamwavelength.com© 2007 LDTC1020-00400-A Rev BTOP VIEW(Actual Size)GENERAL DESCRIPTION:The LDTC0520 combines a 500 mA, low noiselaser driver and 2.2 Amp temperature controlleron one small board. The LDTC1020 parallelstwo 500 mA laser drivers to provide up to 1 Ampof laser current with the 2.2 Amp temperaturecontroller.The WTC3243 will control temperature usingthermistors, RTDs, or linear temperature sensorssuch as the LM335 or the AD590. Adjusttemperature using the onboard trim pot ora remote voltage input from a panel mountpotentiometer, DAC, or other voltage source.A default temperature set point confi gurationprovides fault tolerance and avoids accidentaldamage to system components. Adjustable trimpots confi gure heat and cool current limits.The heart of the laser driver section is the FL500500 mA Laser Driver. It maintains precision laserdiode current (Constant Current mode) or stablephotodiode current (Constant Power mode)using electronics compatible with CommonPhotodiode Cathode (Type A/B) lasers.Combine the low noise drive current of the FL500with the temperature stability of the WTC3243FEATURES:• Small package size• Single supply operation• Cost Effective• RoHS CompliantFEATURES, Laser Diode Driver:• Default current range is 500 mA or 1 Amp.• Low Noise operation• Slow start laser diode protection• Constant Current or Constant Power modes• Compatible with Common PhotodiodeCathode (A or B type) laser diodes• Adjustable laser diode current limitFEATURES, Temperature Controller:• Drive up to 2.2A of TEC current• Internal or External set point control• Fail safe set point defaul• Ultra-stable PI control loop• Separate Heat & Cool current limits• Single power supply operationJune, 2007Figure 1Top View Pin Layout(Pin Descriptions on Page 7)LDTC0520 / LDTC1020VDD_FLVDD_WTCVSGNDSP1SP2LD SHDCOMEXT LD SETCOMLD P MLD I MACT T MSET T MEXT T SETCOMLDCPDAPDCLDACOMTEC+TEC-SEN+SEN-COMJ1J2J3