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DATASHEET AND OPERATING GUIDE
WLD3343 & WLD3393
SMALL FOOTPRINT
The WLD3343 is an easy-to-use analog circuit for space
constrained laser diode applications. The WLD3343
maintains precision laser diode current (Constant Current
mode) or stable photodiode current (Constant Power mode)
regulation using electronics that are compatible with any
laser diode type. Safely supply up to 3 A of current (model-
dependent) to a laser diode from a single +5 V power supply.
MODEL VARIATIONS
There are five laser diode driver models available in the
WLD family. The standard WLD3343 provides up to 2.2 A to
the laser diode. The WLD3343-3A provides up to 3 A. The
WLD3343-2L and WLD3343-3L are lower noise versions
for Constant Current mode of the 2.2 and 3 A models,
respectively. The WLD3343-HB is designed to operate with
lower voltage supplies, including lithium-ion batteries.
CONTENTS
QUICK CONNECT GUIDE
PIN DESCRIPTIONS
ELECTRICAL SPECIFICATIONS
SAFETY INFORMATION
OPERATING INSTRUCTIONS — GENERAL
OPERATING INSTRUCTIONS — STANDALONE
OPERATING INSTRUCTIONS — WITH EVALUATION BOARD
ADDITIONAL TECHNICAL INFORMATION
TROUBLESHOOTING
MECHANICAL SPECIFICATIONS
CERTIFICATION AND WARRANTY
Pb
RoHS
406-587-4910
www.teamWavelength.com
Laser Diode Driver & Evaluation Board
B
A
e
Laser Type
Laser Type
FEATURES AND BENEFITS
• Low cost
• Slow-start laser diode protection
• Drive up to 3 A output current
• Constant Current or Constant Power operation
• Compatible with any laser diode type
• Small package size (1.3" × 1.26" × 0.3")
• Voltage-controlled setpoint
• TTL-compatible shutdown pin
• Adjustable current limit
• Adjustable current range
• 2 MHz Constant Current bandwidth
• Over-temperature shutdown
• 14-pin DIP PCB mount
RAPID PROTOTYPING
Use the WLD3393 Evaluation Board to rapidly prototype
a complete laser diode control system using the of
the WLD3343 laser diode driver. Onboard switches,
connectors, and trimpots make the configuration and
operation simple. Input and output cables are also included
with the WLD3393.
The WLD3343 is excellent for VCSELs, electro-optical
equipment, and medical/dental systems.
ACCESSORIES
In addition to the WLD3393 Evaluation Board, there are
thermal management kits designed specifically for the
WLD. WEV300 includes a thermal washer and heatsink.
WEV301 adds a +5 V fan, while WEV302 adds a +12 V
fan to the kit. Additionally, there are various power supplies
available that fit any current/voltage needs.
ORDERING INFORMATION
PAGE
2
PART NO
4
WLD3343
6
WLD3343-3A
8
WLD3343HB
9
WLD3343-2L
10
WLD3343-3L
16
WLD3393
22
WTW002
25
26
WHS302
28
WXC303
C
Laser Type
WXC304
© September 2018
DESCRIPTION
2.2 A Laser Diode Driver
3 A Laser Diode Driver
2.2 A Li+ Battery-compatible Driver
2.2 A Lower Noise Driver (CC only)
3 A Lower Noise Driver (CC only)
Evaluation PCB
Thermal Washer for all WLDs
Heatsink for all WLDs
+5 VDC Fan for all WLDs
+12 VDC Fan for all WLDs
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Table of Contents
Related Manuals for Wavelength Electronics WLD3343
Summary of Contents for Wavelength Electronics WLD3343
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Page 1: Ordering Information
ACCESSORIES There are five laser diode driver models available in the WLD family. The standard WLD3343 provides up to 2.2 A to In addition to the WLD3393 Evaluation Board, there are the laser diode. The WLD3343-3A provides up to 3 A. The... - Page 2 WLD SERIES LASER DIODE DRIVERS Figure 1 shows the top view of the WLD3343 driver with pin QUICK CONNECT GUIDE layout and descriptions. To ensure safe operation of the WLD3343 Figure 2 shows a typical wiring diagram for the WLD3343...
- Page 3 WLD SERIES LASER DIODE DRIVERS The WLD3343 Series of laser diode drivers are able to drive lasers with any pinout of laser diode and photodiode. Figure 3 illustrates these laser types. For detailed instructions on using the different laser types refer to the Operating Instructions —...
- Page 4 WLD SERIES LASER DIODE DRIVERS PIN DESCRIPTIONS Table 1. Pin Descriptions LABEL NAME PIN DESCRIPTION Shutdown Enable or disable output current to the laser diode using this pin. Laser Diode To ENABLE: Float or connect a zero volt signal to this pin. Output Current To DISABLE: Connect a +3 V or greater signal to this pin.
- Page 5 WLD SERIES LASER DIODE DRIVERS Table 2. Description of jumper connections and functionality on the WLD3393 Evaluation Board. JUMPER OPTIONS FUNCTION 200 mA or 2 A Configures the laser diode output current range to either 200 mA or 2 A. RANGE 200 μA or 2 mA Configures the photodiode current range to either 200 μA or 2 mA.
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Page 6: Electrical Specifications
AMBIENT [1] With Revision D forward of the WLD3343, an internal thermostat has been added to activate Shutdown (SHD) when the internal temperature exceeds 105°C. The output will be re-enabled after a 250 to 300 ms slow-start once the internal temperature drops below 95°C. - Page 7 WLD SERIES LASER DIODE DRIVERS ELECTRICAL SPECIFICATIONS (CONTINUED) MODEL PARAMETER UNIT NOTE WLD3343HB WLD3343-2A WLD3343-3A INPUT Offset Voltage, initial, I Pin 2, T =25°C, V =0 V AMBIENT Bias Current [4] -50 to 150 μA Input Voltage Range 0 to 2...
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Page 8: Safety Information
The voltage and output current are related by a transfer function that varies To determine if the WLD3343 driver will be operating in a by driver model number and maximum current. safe range, follow the instructions for calculating the Safe Operating Area online with your system’s voltages and... - Page 9 DISCHARGE — GENERAL Before proceeding, it is critical that you take precautions to The WLD3343 drivers have dual in-line pin (DIP) packaging, prevent electrostatic discharge (ESD) damage to the driver and are intended to be mounted onto a circuit board.
- Page 10 RANGE value based on maximum output current (I LDMAX depending on operation mode. The output current range of the WLD3343 depends on the selection of current sense resistor R placed between SENSE Pin 8 (RS+) and Pin 10 (RS-) as shown in Figure 4.
- Page 11 Connect a 500 Ω trimpot and a 150 Ω resistor as shown in LIMIT Figure 5 to make the maximum current limit adjustable. The WLD3343 allows a customized current range for a specific application. This allows optimized setpoint resolution while minimizing output noise. The current limit 500 Ω...
- Page 12 R • Place R as close to Pins 12 (PD+) and 13 (PD-) on the WLD3343 as possible to avoid parasitic resistance Equation (8) calculates R for a maximum desired effects from the PCB layout when in Constant Power photodiode current, I .
- Page 13 Laser Diode Anode to Photodiode Cathode DISABLE Part # LM4040 Isolated Photodiode www.national.com online Circuit Calculator automatically determine values external WLD3343 IMON LASER components. DIODE www.teamwavelength.com/ DRIVER support/design-tools/wld- 1 k Ω calculator/ SENSE = (Desired I ) * (2*R SENSE...
- Page 14 (Rev. C) (Rev. A&B) 2.0 A 438 mΩ 500 mΩ 200 mA 5.01 Ω 5.1 Ω WLD3343 IMON LASER DIODE DRIVER 1 kΩ SENSE TIE GROUND CONNECTIONS DIRECTLY TO PIN 7 Figure 10. Type C laser configured for Constant Current operation.
- Page 15 Pin 3 to The available voltage range for V is 0-2 V. the amount of forward current. Connecting voltages outside this range can result in damage to the WLD3343 or the laser diode. PIN3 (11) 2·R...
- Page 16 Board Voltage (fan, heatsink, and thermal (5-12 V) Match up the notch in the WLD3343 with the index marker washer) or equivalent. HB shown in Figure 14. Align the WLD3343 pins with the model requires less voltage. WLD3393 sockets, ensuring that all pins are lined up. Press...
- Page 17 WLD SERIES LASER DIODE DRIVERS Step 3: Choose Operation Mode Step 4: Configure Jumpers The two modes of operation supported by the WLD3393 are Jumper positions are shown in Figure 15. Factory default Constant Current (CC) and Constant Power (CP): locations are noted.
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Page 18: Power Supplies
• Heatsink Requirements: the configuration board to the bottom of the WLD3393 so » Attach a heatsink (WHS302) when the WLD3343 that the arrow on the protruding edge of the configuration will operate between 500 mA and 1.0 A output board points to either A/B or C. - Page 19 WLD SERIES LASER DIODE DRIVERS Step 8: Set The Laser Diode Current Limit Step 9: Connect The Laser Diode And Monitor Photodiode The WLD3393 LIM trimpot adjusts the laser diode current limit from zero to the full 200 mA or 2.2 A, depending on the With power removed from the WLD3393 board, connect laser diode current range selected.
- Page 20 Since PD+ connect the external setpoint voltage source to the SET and PD- on the WLD3343 are shorted together in CC terminal on the terminal block. When the VSET SOURCE mode, PMON will only monitor photodiode current in jumper is in the “X”...
- Page 21 WLD SERIES LASER DIODE DRIVERS Step 12: Enable Or Disable The Output Current The WLD3343 output current can be enabled and disabled using the onboard toggle switch. The output is enabled when the green ON LED indicator is lit (see Figure 13).
- Page 22 For lowest noise, operate in Constant Current mode with the cathode of the laser diode grounded (Type C). If you buy a special low-noise version of the WLD3343 THERMAL MANAGEMENT KITS (WLD3343-2L, or WLD3343-3L for 3 A output), you can The WLD Series of laser diode drivers have customized decrease noise by a factor of 2.5 under the same conditions.
- Page 23 Refer to the Wavelength Electronics website for the most Voltage Across WLD3343 (V) up-to-date SOA calculator for our products. The online tool Figure 20. SOA for WLD3343 with thermal washer, heatsink, is fast and easy to use, and also takes into consideration and fan.
- Page 24 WLD SERIES LASER DIODE DRIVERS WLD3393 EVALUATION BOARD SCHEMATIC Figure 23. WLD3393 evaluation board schematic. © 2018 www.teamWavelength.com...
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Page 25: Troubleshooting
WLD SERIES LASER DIODE DRIVERS TROUBLESHOOTING PROBLEM POTENTIAL CAUSES SOLUTIONS Standalone: Carefully check the wiring diagram according to Improperly configured power page 13 and page 14. Driver will not switch on supply Evaluation Board: See page 18 for details regarding power supply connections. -
Page 26: Mechanical Specifications
0.20 0.900 [5.1] [22.86] 1.30 [33.0] PCB FOOTPRINT The WLD3343 can be directly soldered 0.945 [24.00] SQ. to a PCB or installed in a socket soldered to the PCB. Two 7-pin SIP sockets are required. Wavelength recommends 0.125 [3.18] Thru Aries Electronics, PN 25-0513-10. - Page 27 2.25 [57.1] 1.32 [33.5] 0.93 [23.6] 1.00 [25.4] 0.56 [14.2] The WLD3343 connects to the evaluation board by two 7-pin SIP sockets. The socket manufacturer is Aries Electronics, PN 25-0513-10. All Tolerances ±5%; units in inches [mm] © 2018 www.teamWavelength.com...
- Page 28 There are no user-serviceable parts inside this product. Return the product met its published specifications at the time of shipment. product to Wavelength Electronics for service and repair to ensure Wavelength further certifies that its calibration measurements are that safety features are maintained.
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