THE PULSE OF THE FUTURE P C X -1 5 0 150A QUASI -CW LASER DIODE DRIVER/PULSED CURRENT SOURCE • • • • • • • The PCX-150 is an air-cooled, high power pulsed current source designed to drive diode lasers, bars and arrays. It delivers current pulses variable from 1A to 150A, pulse widths variable from <50µs to 5ms, with rise times <5µs, and pulse repetition frequencies variable from single shot to 5KHz at duty cycles up to 20%. A microprocessor-controlled front-panel and RS-232/IEEE-488 interface provide individual control of each electronic function, while the backlit display provides immediate visual confirmation of all operating parameters, including output current setpoint and amplitude, pulse width, repetition frequency, duty cycle, and error and fault messages. The front panel controls allow the user to set either pulse width and frequency independently, or to set frequency and duty cycle, which then sets the pulse width accordingly. The front panel display monitors both the setpoints, and the actual current delivered to the diode. Analog current and voltage monitors and a synchronization output are also provided for monitoring of the current and voltage to the laser diode. In addition to stand-alone operation, the PCX-150 can be externally triggered. Connection to the laser diode is made through an innovative front panel, low impedance ribbon cable, designed to preserve Output Current Up To 150A Output Voltage Up To 100V Rise Time < 10µ µs Pulse Width < 50µ µ s to 5ms 5KHz Maximum Frequency Drives up to 50 diodes simultaneously IEEE-488 (GPIB) and RS-232 Computer Interfaces the fidelity of high-speed, large-amplitude current pulses. The output connector is interlocked, so that the PCX-150 is disabled when the connector is removed. The PCX-150 features advanced circuitry to protect both the diode and driver. A relay closure shorts the output to ground when power to the driver is turned off. At turn on, and at any time the driver is not pulsing, the PCX-150’s output is electronically shorted to ground, ensuring that no current flows through the diode except during the on period of the pulse. In addition, the actual current through the diode is monitored in real-time. If the actual current ever exceeds the user-adjustable current setpoint, the driver truncates the output current pulse, electronically shorts the output to ground, and displays an error message on the frontpanel display. In addition, the PCX-150 has a factory-set hardware-controlled current-limit and an independent, useradjustable current limit. This provides a fail-safe mechanism to prohibit the user from setting the current amplitude setpoint above the user-controlled current limit. A user-selectable slow-start option allows the user to configure a slow-start current ramp, as shown in the waveform below. Safety features of the PCX-150 include a laser enable keyswitch, an output cable safety interlock, remote interlock, and delayed Slow-start Ramp Function, 0-120A Output, 6A Step Increments 25ms/Div horizontal scale, 20A/Div vertical scale 2ms Pulse, 150A, 100V Output 250µs/Div horizontal scale, 25A/Div vertical scale 6.5µ µ s Rise, 9µ µ s Fall 150A, 100V Output 25µs/Div horizontal scale, 25A/Div vertical scale DIRECTED ENERGY INCORPORATED THE PULSE OF THE FUTURE SPECIFICATIONS PARAMETER MODEL PCX150-2 5 Drives 1 to 12 Diodes in Series MODEL PCX150-5 0 Drives 1 to 25 Diodes in Series MODEL PCX150-100 Drives 1 to 50 Diodes in Series 1A to 125A 1A to 150A 1A to 150A PULSE OUTPUT CURRENT Amplitude Range Output Current Resolution 0.1A Accuracy At ≥25A Setpoint 1% Slow-start Ramp Resolution 0.1A Pulse Rise Time <10µs (10%-90%) (1) Pulse Fall Time <10µs (10%-90%) (1) Pulse Width 50µs to 5ms Pulse Recurrence Frequency Range Maximum Duty Cycle and Average Current Output Pulse Width Stability Single Shot to 5KHz 4% at 125A, 6% at 100A, 40% at 15A. The 2% at 150A, 3.5% at 100A, 23% at 15A. The 2% at 150A, 3% at 100A, 20% at 15A. The max. average output power is 160W, and max. average output power is 175W, and max. average output power is 300W, and the average current cannot exceed 6A. the average current cannot exceed 3.5A. the average current cannot exceed 3A. ≤±0.5% at 1ms pulse width, 125A at maximum output voltage Output Pulse Amplitude Stability ≤±0.5% at 1ms pulse width, 125A at maximum output voltage Output Pulse Flatness ≤±0.1% at 1ms pulse width, 125A at maximum output voltage Over/undershoot <5% Jitter <10ns shot -to-shot Output Connector Ribbon Cable, Front Panel COMPLIANCE VOLTAGE Range 1V to 25V 1V to 50V Resolution 1V to 100V 1V CURRENT LIMIT Range 1A to 150A Resolution 1A TRIGGER IN TTL or +5V ±1V, into 50 Ω Trigger Input Minimum Trigger Pulse Width 100ns Input Trigger Connector BNC, Front Panel SYNC MONITOR OUTPUT Sync Monitor TTL output into high impedance Sync Monitor Connector BNC, Front Panel CURRENT MONITOR OUTPUT CVR Monitor 50A/1V into 50Ω, typically within 1% of the displayed actual current CVR Monitor Connector BNC, Front Panel VOLTAGE MONITOR OUTPUT Voltage Monitor Voltage Monitor Connector 50V/1V into 50Ω, typically within 1% of the actual voltage BNC, Front Panel GENERAL Input AC Power Dimensions (H X W X D) 90-240VAC Nominal, 50/60Hz 3 1/4” x 17” x 21” Weight Approx. 22 lbs Safety Complies with CDRH US21 CFR 1040.10 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT N OTICE (1) Contact the factory for optional faster rise and fall time configurations. 9200-0205 REV 5 Directed Energy, Inc. An IXYS Company 2401 Research Blvd., Suite 108 Fort Collins, CO USA 80526 970-493- 1901 Fax: 970-493-1903 Email: [email protected] Web: http://www.directedenergy.com