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Analog Technologies ALDD28V15A401, Quick Start Manual

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Analog Technologies ALDD28V15A401 Quick Start Manual Download Page 9

 

1161 Ringwood Ct, #110, San Jose, CA 95131, U. S. A. Tel.: (408) 748-9100, Fax: (408) 770-9187                           www.analogtechnologies.com 

Copyrights 2000-2021, Analog Technologies, Inc. All Rights Reserved. Updated on 3/11/2021   

 

  Email: [email protected]/[email protected]             9     

Analog Technologies 

ALDD28V15A401

Digital High Voltage Constant Current 15A Laser Driver

Or 

 

After the setting is completed, turn the switch to “ON” and 
the controller starts working. 

Press and hold the “Help” button, the display contents are as 
follows: 

 

          

OUTLINE DIMENSIONS  

Dimensions of the DIP package driver are shown in Figure 7. 

 

 

Figure 7. Dimensions of the DIP Package Driver

 

It is highly recommended to lower the solder iron 
temperature to 310°C (590°F) and solder the driver 
manually

, so that the internal contents of the driver would 

not be affected. 

After the soldering, it is also safe to check the laser driver’s 
functionality by using the “dummy laser” before connecting 
a real laser diode as mentioned previously on page 4. 

NOTE: 

The power supplies may have over-shoot voltage 

spikes when they are not connected well with the load or 
when they recover from an over current protection state. 
When that happens, it may exceed the maximum allowed 

input voltage, 27V, of the controller and damage the 
controller permanently. To avoid this from happening, do 
the following: 

1. Connect the controller well with the power supply before 

turning on the power.  

2. Make sure that the power supply has sufficient output 

current. It is suggested that the power supply can 
supply 1.2 to 1.5 times the maximum current the 
controller requires.  

Summary of Contents for ALDD28V15A401

Page 1: ...le mode laser diodes to achieve mode hop free and narrow optical wavelength drift thus long coherent length Because of the high efficiency the laser driver generates a small amount of heat thus no heat sink is necessary for normal operation The fully shielded case blocks all the incoming and outgoing EMIs Electro Magnet Interferences Therefore this laser will not interfere other surrounding electr...

Page 2: ... states between 0V 0 3V it shuts down the entire laser driver between 0 5V 1 2V it sets the laser driver to standby mode between 1 5V 28V it sets the laser driver to operation mode The input current on this pin is 2µA 6 LPGD Digital Output Loop Good indication When the laser driver s output current equals the set point current value and there is no short nor open circuit at the output this pin is ...

Page 3: ...A Low frequency output current noise peak to peak value 0 1Hz to 10Hz 15 µAP P Stability 15A 20 C 80 C 0 01 650 µA Laser current control signal at LIS 0 1 4 096 V LIS control accuracy 0 1 Laser current indication signal at LIO 0 1 4 096 V LIO indication accuracy 0 2 Reference output voltage 4 096 0 008 V Output voltage range at LDA 0 1VVPS to 0 8VVPS V Output voltage at LDC 0 V Power supply voltag...

Page 4: ...ignal level between 0V to 0 3V the shutdown output is activated It shuts down the whole laser driver and drives the laser driver into shutdown Mode Upon detecting the level to be between 0 5 and 1 2V the standby signal is activated it puts the controller into Standby Mode When the signal is between 1 5V and above the controller is driven into Operation Mode Figure 4 Input Control There is a temper...

Page 5: ... the output current is 0A the LIO voltage is 0V when output current is 15A the LIO voltage is 4 096V The relationship is VLIO V IOUT A 15 A 4 096 V IOUT A VLISL V 4 096 V 15 A VLIO is the voltage on the LIO pin The output stage is designed to achieve low noise high efficiency and relatively high modulation speed It has an over current protection circuit There is a soft start circuit which increase...

Page 6: ...ser diode to turn off the laser beam such as half of its value Use the LIS pin to set the laser current when the laser diode is turned on In this way the laser beam is turned on and off while the driver control loop is always kept on so that the output stage is always under control no distortion is caused by turning on off the output stage When LPGD pin is high 2V the laser diode control loop is w...

Page 7: ...igure 6 The output current will be IOUT A 3 662 VLIS LIS can also be set by using a DAC to replace the W1 in Figure 6 Make sure that the DAC has low output noise Monitoring the Output Current The output current of the driver can be monitored by measuring the voltage on the LIO pin This feature is very useful for a micro driver based system where the ADC is available and monitoring of the current i...

Page 8: ...umber 0 9 press the Set button to select which digit to be changed When the first digit flashes use to change the number 0 9 The default password is 99 Once you enter the correct password you can start setting up the controller 3 After entering the correct password press and hold the Set button to enter the setup mode The display contents are as follows We can select internal control or external c...

Page 9: ... 310 C 590 F and solder the driver manually so that the internal contents of the driver would not be affected After the soldering it is also safe to check the laser driver s functionality by using the dummy laser before connecting a real laser diode as mentioned previously on page 4 NOTE The power supplies may have over shoot voltage spikes when they are not connected well with the load or when th...

Page 10: ...on being relied on is current and complete 3 All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment including those pertaining to warranty patent infringement and limitation of liability Testing and other quality control techniques are utilized to the extent ATI deems necessary to support this warranty Specific testing of all parameters of ea...

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