THE PULSE OF THE FUTURE PCX-6220 150A 40V QUASI-CW LASER DIODE DRIVER/PULSED CURRENT SOURCE The PCX-6220 is an air-cooled, high power switch-mode 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 20ms, and pulse repetition frequencies variable from single shot to 5KHz at duty cycles up to 50%. A microprocessor-controlled front-panel and RS-232/IEEE-488 interface provide individual control of each electronic function, while the backlit alphanumeric LCD display provides immediate visual confirmation of all operating parameters, including output current amplitude, pulse width, repetition frequency, duty cycle, and error and fault messages. In addition to stand-alone operation, the PCX-6220 can be externally triggered. The output voltage, output current and average output power are continuously displayed on the front panel display. Instrumentquality analog current and voltage monitors and a synchronization output are also provided for real-time monitoring of the current and voltage to the laser diode. Internal DC power supplies provide all necessary support power for the driver, allowing operation on 90-260VAC, 50-60Hz mains. No additional DC power supply or control pulse generator inputs are needed, making the PCX-6220 a complete laser diode driver solution. Connection to the laser diode is made through an innovative rear panel, low impedance stripline cable, designed to preserve the • Output Current Up To 150A • Output Voltage Up To 40V • 6kW Peak, 1.2kW Average Output Power • Pulse Width < 50µ µs to 20ms • 5KHz Maximum Frequency • 50% Maximum Duty Cycle • IEEE-488 (GPIB) and RS-232 Computer Interfaces fidelity of high-speed, large-amplitude current pulses. For operator safety, the output connector is interlocked, so that the PCX-6220 is disabled when the connector is removed. The PCX-6220 features advanced circuitry to protect both the diode and driver. A user-adjustable over-current limit provides a fail-safe mechanism to prohibit the user from setting the current amplitude setpoint above the user-controlled limit, protecting the laser diode from accidental over-drive. An over-voltage limit protects the diode from erroneous over-voltage conditions, and a temperature monitor protects the driver in the event of an overtemperature condition. At turn on, and at any time the driver is not enabled, the PCX-6220’s output is electronically shorted to ground, ensuring that no current flows through the diode. 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 front-panel display. The PCX-6220 is power-factor corrected. The switch-mode design of the current source features low internal stored energy, and offers typical wall-plug to output connector efficiency >70%. Safety features of the PCX-6220 include a laser enable keyswitch, an output cable safety interlock, remote interlock, and delayed output enable. 20% Duty Cycle. 150A, 40V Output 250µs/Div horizontal scale, 25A/Div vertical scale 20ms Pulse, 150A, 40V Output 2.50ms/Div horizontal scale, 25A/Div vertical scale 50µ µs Min. Pulse Width 150A, 40V Output 10µs/Div horizontal scale, 25A/Div vertical scale DIRECTED ENERGY INCORPORATED THE PULSE OF THE FUTURE SPECIFICATIONS PARAMETER PULSE OUTPUT CURRENT Current Amplitude Range Voltage Polarity Maximum Output Voltage Output Current Resolution Accuracy At ≥25A Setpoint Display Resolution Pulse Rise Time Pulse Fall Time Pulse Width Pulse Recurrence Frequency Range Maximum Duty Cycle and Average Power Over/undershoot Settling Time Output Ripple Jitter Output Connector CURRENT LIMIT Range Resolution TRIGGER IN Type Trigger Input Minimum Trigger Pulse Width Input Trigger Connector SYNC MONITOR OUTPUT Sync Monitor Sync Monitor Connector CURRENT MONITOR OUTPUT CVR Monitor CVR Monitor Connector VOLTAGE MONITOR OUTPUT Voltage Monitor Voltage Monitor Connector GENERAL Operating Temperature Range Cooling Requirements Input AC Power Dimensions (H X W X D) Value 0A to 150A (1) Floating 40V 0.5A 1% 0.5A When the laser is off, the displayed value is the amplitude setpoint; when the laser is on, both the setpoint and the actual measured current are displayed. <25µs (10%-90%) <25µs (10%-90%) 50µs to 20ms Single Shot to 5KHz 50% Maximum, 20% @ 150A, 40V output Maximum average output power is 1200W. Maximum duty cycle is dependent upon output voltage and current, but cannot exceed 1200W average output power or 75A average output current <3% <25µs (90% to 1% of final value) <1.5% <500ns shot-to-shot High Current DSUB, Rear Panel 10A to 165A 1A Positive Edge Trigger TTL or +5V ±1V, into 50Ω 100ns BNC, Front Panel TTL output into 50Ω BNC, Front Panel 50A/1V into 1 MegΩ, typically within 1% of the displayed actual current BNC, Front Panel 10V/1V into 1 MegΩ, typically within 1% of the actual voltage BNC, Front Panel 0°C to +40°C Air cooled 90-260VAC, 50-60Hz 8 ¾” H x 17” W x 20” D Rack mount enclosure SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE (1) The current adjustment range is 0A to 150A, however the pulse performance is not characterized at output current less than 10A. Pulse fidelity (i.e. overshoot or ripple) may exceed specifications at current levels less than 10A. 9200-0220 REV 3 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