Table of Contents
Advertisement
Quick Links
DATASHEET AND OPERATING GUIDE
LDTC2/2E & LDTC2/2O
Laser Diode & Temperature Controllers
POWER & STABILITY
Combine the drive power of the WLD3343 laser driver (up
to 2.2 A) with the temperature stability of the WTC3243
temperature controller (±2.2 A available) on one small board.
Available as an open frame or in a chassis mount enclosure.
APPLICATIONS
Ideal for integrated laser driver or LED packages that include
temperature control, often utilized in medical diagnostic
equipment, remote sensing, analytical instrumentation,
military, and communications applications.
CONTENTS
406-587-4910
www.teamWavelength.com
FEATURES AND BENEFITS
• ±2.2 A of TEC and 2.2 A of LD current (up to 3 A
with product variation)
• Small package size
• Single supply operation LD: +5 to +12 V
• Single supply operation TC: +5 to +28 V
• Slow start laser diode protection
• Constant Current or Constant Power modes
• Adjustable laser diode current limit
• Remote TTL Shutdown/Interlock
• Ultra-stable PI control loop
• Separate heat & cool current limits
• Failsafe Setpoint default for D/A remote
temperature setting
POWER YOUR APPLICATION WITH
THE RIGHT FEATURES
The WTC3243 will control temperature using thermistors,
RTDs, or linear temperature sensors such as the LM335
or the AD590. Adjust temperature using the onboard
trimpot or a remote voltage input from a panel mount
potentiometer, DAC, or other voltage source. A default
temperature setpoint configuration provides fault tolerance
and avoids accidental damage to system components.
Adjustable trimpots configure heat and cool current limits.
The WLD3343 Laser Driver maintains precision laser diode
curent (Constant Current Mode) or stable photodiode
current
(Constant
compatible with A/B Type lasers.
ORDERING INFORMATION
PAGE
2
PART NO
5
LDTC 2/2E
7
LDTC 2/2O
WEV-300* Thermal Washer & Heatsink
9
WEV-301* Thermal Washer, Heatsink, 5 V Fan
WEV-302* Thermal Washer, Heatsink, 12 V Fan
10
* Only for 2/2O
12
15
20
21
23
26
Applies to Product Revisions A - B
© January 2019
Power
mode)
DESCRIPTION
Enclosed 2.2 A LD/TEC Controller
Open Frame 2.2 A LD/TEC Controller
e
RTD
Pb
R
T
RoHS
using
electronics
B
A
Laser Type
Laser Type
AD590
LM335
Advertisement
Table of Contents
Related Manuals for Wavelength Electronics LDTC2/2E
Summary of Contents for Wavelength Electronics LDTC2/2E
-
Page 1: Table Of Contents
DATASHEET AND OPERATING GUIDE LDTC2/2E & LDTC2/2O Laser Diode & Temperature Controllers FEATURES AND BENEFITS • ±2.2 A of TEC and 2.2 A of LD current (up to 3 A with product variation) • Small package size • Single supply operation LD: +5 to +12 V •... - Page 2 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER QUICK CONNECT GUIDE It is imperative that you verify the unit will Visit the Wavelength Electronics website for the most operate within the internal heat dissipation accurate, up-to-date, and easy to use SOA calculator: Safe Operating Area (SOA).
- Page 3 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER RECOMMENDED LASER DRIVER TEST LOAD RECOMMENDED THERMOELECTRIC TEST LOAD For the laser diode driver, recommended simulated laser loads are shown in Figure 3 and Figure 4. For the temperature controller, recommended simulated thermoelectric and thermistor circuits are shown in Figure 5 Constant Current Mode and Figure 6.
-
Page 4: Pin Descriptions
LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER PIN DESCRIPTIONS Table 1. Pin Descriptions and Wire Colors CABLE NAME PIN DESCRIPTION COLOR Connector J1 – WCB300 Connect +5 to +12 V between Pins 1 & 3 to power the control electronics Supply Voltage to Control 1 (VDD) Electronics and Laser... - Page 5 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER Table 2. Monitor & Setpoint Transfer Functions FUNCTION EQUATION DESCRIPTION Monitor Transfer Functions Converts voltage output of Laser Diode Current Monitor (Pin 8, Laser Diode Forward Current LD I M Connector J2) to forward current through Laser Diode. Measurement 2·R Default R...
-
Page 6: Electrical Specifications
Case Operating Temperature -40 to 85 ºC Case Storage Temperature -65 to 150 ºC 184.3 g (LDTC2/2E) Weight 68.0 g (LDTC2/2O) 121.9 × 68.6 × 29.0 mm (2/2E) Size 4.8 × 2.7 × 1.14 4.2 × 2.5 × 1 inches 106.7 ×... - Page 7 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER ELECTRICAL SPECIFICATIONS (CONTINUED) TEMPERATURE CONTROLLER UNIT NOTE SPECIFICATIONS TEMPERATURE CONTROL Short Term Stability, 1 hour 0.0009 °C OFF ambient, 10 kΩ thermistor @ 25°C Short Term Stability, 1 hour 0.002 °C ON ambient, 10 kΩ thermistor @ 25°C Long Term Stability, 24 hours 0.002 °C...
-
Page 8: Safety Information & Thermal Design Considerations
CONSIDERATIONS the temperature stability of the WTC3243. SAFE OPERATING AREA — DO NOT EXCEED The LDTC2/2E is enclosed with a cover and base, while the LDTC2/2O is open frame without cover or base. Accessory INTERNAL POWER DISSIPATION LIMITS heatsinking is required for LDTC2/2O. Both have the same Before attempting to operate the LDTC, it is imperative that functionality. -
Page 9: Operating Instructions - Temperature Controller
LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER OPERATING INSTRUCTIONS – WIRE OUTPUT CONNECTION Use Table 4 to determine the connection from the LDTC2/2 TEMPERATURE CONTROLLER to your thermoelectric or resistive heater. Operate the LDTC2/2 with all loads attached. Table 4. Wiring vs. Sensor & Load Type If you short either the LD or TC output connections during setup, current will flow TEC+... - Page 10 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER POWER SUPPLY SELECTION TEMPERATURE SETPOINT The V voltage supply input is common to both the WLD3343 Wavelength introduces a special setpoint circuit with the and the WTC3243. This supply furnishes the voltage to the LDTC2/2.
-
Page 11: Laser Driver
Wavelength Electronics offers a selection of switching power supplies in a range of output voltage and current capacities. © 2018... - Page 12 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER DISABLING THE OUTPUT CURRENT MONITOR LASER DIODE OR PHOTODIODE CURRENT The output current can be enabled and disabled as shown in Figure 9 using the on-board toggle switch. The Enable LED Equation 1 provides a transfer function for converting the lights green when laser diode current is enabled.
- Page 13 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER To use an external voltage source summed with the voltage CONFIGURE THE LASER DIODE CURRENT LIMIT supplied by the ISET trimpot, place the VSET jumper in the The default configuration of the LDTC2/2 uses a trimpot lower position (as shown in Figure 10).
-
Page 14: Additional Technical Information
LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER ADDITIONAL TECHNICAL CONFIGURATION FOR ALTERNATE TEMPERATURE SENSORS INFORMATION LM335 This section includes useful technical information on the To use a National Semiconductor LM335 temperature sensor following topics: with the LDTC2/2, attach the LM335 cathode to SENSOR+ •... - Page 15 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER CHANGING THE LASER DIODE OUTPUT CURRENT RANGE The output current range of the WLD3343 depends on the selection of resistor R . Two 2520-sized resistors SENSE combine in series to produce this total R resistance SENSE (R14 &...
- Page 16 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER LASER DRIVER BLOCK DIAGRAM Figure 13. Block Diagram for WLD3343 Connections © 2018 www.teamWavelength.com...
- Page 17 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER TEMPERATURE CONTROLLER BLOCK DIAGRAM Figure 14. Block Diagram for WTC3243 Connections © 2018 www.teamWavelength.com...
- Page 18 If you have questions, or run into difficulties calculating the SOA, contact Wavelength Electronics for assistance. The SOA chart must be examined for both the laser driver and for the temperature controller.
-
Page 19: Troubleshooting - Temperature Controller
LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER TROUBLESHOOTING – TEMPERATURE CONTROLLER PROBLEM POTENTIAL CAUSES SOLUTIONS Temperature is decreasing The TEC may be connected The convention is that the red wire on the TEC module connects to when it should be increasing. backwards to the LDTC. -
Page 20: Laser Driver
LDTC. photodiode (PD) current at the desired output power level. If the PD current exceeds the LDTC PD current range, the LDTC will require modification. Contact the Wavelength Electronics Sales department for assistance. © 2018 www.teamWavelength.com... - Page 21 LASER DIODE SHUTDOWN LD SHD PD MON PINK PHOTODIODE MONITOR IN CC MODE LOW CURRENT GROUND NOTE: LDTC2/2E & LDTC2/2O Rev. A DO NOT HAVE PINS 1 & 2 of WCB309. These were labeled as spares for Rev. A. © 2018 www.teamWavelength.com...
-
Page 22: Mechanical Specifications
LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER MECHANICAL SPECIFICATIONS DIMENSIONS – LDTC2/2E (WITH ENCLOSURE) Ø0.13" [Ø3.2 mm] 4 PLACES 4.80" [121.9 mm] 4.50" [114.3 mm] 4.20" [106.7 mm] 0.30" [7.6 mm] 0.15" [3.8 mm] 2.40" [61.0 mm] 0.15" [3.8 mm] 2.70"... - Page 23 3.700 2.500 2.200 0.150 6-32 UNC-2A X 1/4" SCREW 4 PLS Wavelength Electronics circuit board 0.750 2.000 Customer mounting surface Use the longer standoff when mounting unit with a fan. Use the smaller standoff for mounting directly to instrument. All tolerances ±5%; units in inches [mm].
- Page 24 LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER MECHANICAL SPECIFICATIONS DIMENSIONS – HEATSINK FOOTPRINT 1.25" [31.7 mm] Ø0.156" [ Ø4.0 mm] 4-40 tapped 0.945" [24.0 mm] holes in device 3.70" [94.0 mm] 2.40" [60.9 mm] 0.945" [24.0 mm] 0.68" [17.2 mm] 0.15"...
-
Page 25: Certification And Warranty
CERTIFICATION AND WARRANTY There are no user-serviceable parts inside this product. Return the CERTIFICATION product to Wavelength Electronics for service and repair to ensure that safety features are maintained. Wavelength Electronics, Inc. (Wavelength) certifies that this product met its published specifications at the time of shipment.