PCB-driver-41 rev 1.2 22.04.2015 Description PCB-driver-41 driver is designed as power supply of Mid-IR LEDs. It provides pulse mode operation, which can be adjusted by jumpers (different values of current, frequency and pulse duration can be triggered). A synchronization input terminal block allows synchronizing the driver with an external device, with two or more drivers simultaneously, or setting custom frequency of the LED A synchronization output terminal block gives the possibility of synchronization with an external device. In case of circuit brake, a safety system for prevention of LED damage is included. Features • Pulse mode operation (for maximum peak optical power) • Adjustment of LED current amplitude, frequency and pulse duration via driver’s jumpers • Synchronization input terminal block which allows: - synchronizing driver with an external device (synchronous detector etc.) - synchronizing two or more drivers simultaneously - setting custom frequency of the LED signal • Possibility of synchronization with an external device with the help of synchronization output terminal block. • Safety system for prevention of LED damage in case of circuit brake Main Characteristics Parameter Input Voltage (stabilized) Voltage Tolerance Power Consumption Input Current Synchronization Output Voltage Board Dimensions Symbol Min. VSUPPLY Values Typ. Max. 12.0 Unit 5 80 x 70 x 15 V % W A V mm Symbol Pulse Mode Unit tp f 2 / 5 / 10 / 20 0.5 / 2 / 8 / 16 0.2 / 0.6 / 1.0 / 1.5 / 1.9 µs kHz A -5 P ISUPPLY VS +5 4 0.3 Adjustable Parameters Parameter Pulse Duration Frequency Output Current Amplitude www.roithner-laser.com IOUT 1 Driver Layout 1. 2. 3. 4. 5. 6. 7. 8. Power input terminal block Circuit break indicator (red) LED current indicator (green) LED connection terminal block Pulse duration adjustment jumper Frequency adjustment jumper LED current adjustment jumper Synchronization input terminal block 9. Synchronization output terminal block www.roithner-laser.com 2 Operating Mode Description PCB-driver-41 driver works in a pulse mode. This mode provides LED maximum peak optical power. LED current can be changed switching the jumper 7 (0.2; 0.6; 1.0; 1.5 and 1.9 A). Pulse duration can be changed using the jumper 5 (2; 5; 10 and 20 µs). Frequency of an LED can be adjusted using the jumper 6 (512 Hz, 2 kHz, 8 kHz or 16 kHz). Frequency can be also adjusted by an external signal source connected via synchronization input. Pulse Mode Current-Time Relation 0.2-2.0 А Note! When external signal source is connected to the synchronization input, frequency of an LED is determined by this source and NOT by the jumper. External signal should meet the following requirements: Parameter Pulse Duration Frequency Pulse Voltage Amplitude Value Unit >10 0.5 – 16 5 µs kHz V Note! You can stop driving the LED temporarily by putting external signal with 5V constant voltage on synchronization input. www.roithner-laser.com 3 Operating Instruction 1. Carefully connect appropriate pins of the LED with LED connection terminal block (4) till tight fixation. LED + pin LED input terminal block LED - pin PCB-driver-41 Note! Terminal block header marked with “LED +” must be connected to the appropriate pin of an LED (marked with a red point). Improper connection may cause LED damage. Note! LED case must be electrically isolated from the ground. 2. Connect driver’s synchronization output terminal block (9) with synchronisation input of PCB-sdetect-3P synchronous detector or other synchronisation device. synchronisation input terminal block synchronisation output terminal block PCB-driver-41 PCB-sdetect-3P 3. (Optional) Connect an external signal generating device with synchronization input (10). External signal should meet the requirements presented on the page 3. External signal generating device synchronisation input terminal block PCB-driver-41 www.roithner-laser.com 4 Note! Regarding the resulting signal forms in different conditions please refer to the graph below: PCB-driver-41 Signal Synchronization with Synch. Input and Synch. Output PCB-driver-41 Signal Synchronization with Synchronization Output 4. Select required regime using pulse duration, frequency and LED current adjustment jumpers (5, 6 and 7 respectively). In case of using an external signal source, frequency will be adjusted via the source. 5. Check that the circuit break safety system is turned on – jumper (8) should be put on. 6. Connect a power supply to the power input (1). LED current indicator (green) (3) will be turned on if everything is connected properly. In case of circuit break red indicator (2) will be turned on and LED current indicator (3) will be pulsing till the problem will be solved. Note! Circuit break safety system triggers when operation voltage exceeds 2.5V. Subsequently, the system may turn on in case of using of LED models with high voltage values (some LEDs with peak wavelengths at 1.6-2.4 µm) despite proper connection. If the problem occurs take the following steps: • make sure that voltage of an LED is more than 2.5 V at chosen working current, referring to the appropriate LED current-voltage characteristic pointed in the technical report. • check that all the connections are proper and secure. • put off the jumper (8) to disable the safety system. 7. Make all the connections of other boards (synchronous detector, thermocontroller etc.) following the appropriate instructions manuals. Before turning them on, check the required connections and modes: Driver: • LED connection • Synchronisation with sync. detector • Pulse duration, frequency, current selection • External connections (if necessary) Thermocontroller: • Thermistor / PCB-driver-51 temperature observation block input connection • Thermocooler output connection • External connections (if necessary) Note! Please follow the requirements presented in the table of “Main Characteristics” and “Adjustable Parameters” to provide driver’s faultless operation. www.roithner-laser.com 5 Outline Dimensions PCB-driver-41 Connections Power input DC 12V 0.4A 0.2/0.6/1.0/1.5/1.9А Circuit break safety system disabling jumper LED input (optional connection) synchro output External device: synchronous detector (optional connection) synchro input 0-5V, >10µs, 0.5-16kHz 2/5/10/20 µs Pulse duration adjustment jumper External devices: signal generator input/output device 0.5/2/8/16 kHz Frequency adjustment jumper Precautions • • • • Do not switch jumpers during work. Do not turn on the driver without jumpers inserted. Do not use multimeter to control and adjust current. Please keep the following driver’s regimes listed in the table below. Otherwise excessive load may cause overheating and LED damage. Maximum Allowed Current at Different Operation Modes (Frequency and Pulse Duration) 2 5 10 20 Frequency 512 Hz 1.9 1.9 1.9 1.9 2 kHz 1.9 1.9 1.5 0.6 8 kHz 1.5 0.6 0.2 0.2 16 kHz 0.6 0.2 0.2 0.2 Current [A] Pulse Duration [µs] Operation: Indoor operation only. Ingress Protection Rating IP00. © All Rights Reserved The above specifications are for reference purpose only and subjected to change without prior notice www.roithner-laser.com 6