the pulse of the future directed energy incorporated ? output current up to 150a ? output voltage up to 40v ? 6kw peak, 1.2kw average output power ? pulse width < 50 s to 20ms ? 5khz maximum frequency ? 50% maximum duty cycle ? ieee-488 (gpib) and rs-232 computer interfaces 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 <50 s 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. instrument- quality 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 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 over- temperature 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. PCX-6220 150a 40v quasi-cw laser diode driver/pulsed current source 20% duty cycle. 150a, 40v output 250 s/div horizontal scale, 25a/div vertical scale 20ms pulse, 150a, 40v output 2.50ms/div horizontal scale, 25a/div vertical scale 50 s min. pulse width 150a, 40v output 10 s/div horizontal scale, 25a/div vertical scale
the pulse of the future directed energy, inc. an ixys company 2401 research blvd., suite 108 fort collins, co usa 80526 970-493-1901 fax: 970-493-1903 email: deiinfo@directedenergy.com web: http://www.directedenergy.com 9200-0220 r ev 3 s pecifications s ubject t o c hange w ithout n otice (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. specifications parameter value pulse output current current amplitude range 0a to 150a (1) voltage polarity floating maximum output voltage 40v output current resolution 0.5a accuracy at 25a setpoint 1% display resolution 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. pulse rise time < 25 s (10%-90%) pulse fall time < 25 s (10%-90%) pulse width 50 s to 20ms pulse recurrence frequency range single shot to 5khz maximum duty cycle and average power 50% maximum, 20% @ 150a, 40v output maximum average output power is 1200w. maximum duty cycle is depend- ent upon output voltage and current, but cannot exceed 1200w average output power or 75a average output current over/undershoot <3% settling time <25 s (90% to 1% of final value) jitter <500ns shot-to-shot output connector high current dsub, rear panel range 10a to 165a resolution 1a trigger in type positive edge trigger trigger input ttl or +5v 1v, into 50 ? minimum trigger pulse width 100ns input trigger connector bnc, front panel sync monitor output sync monitor ttl output into 50 ? sync monitor connector bnc, front panel current monitor output cvr monitor 50a/1v into 1 meg ?, typically within 1% of the displayed actual current cvr monitor connector bnc, front panel voltage monitor output voltage monitor 10v/1v into 1 meg ?, typically within 1% of the actual voltage voltage monitor connector bnc, front panel general operating temperature range 0 c to +40 c cooling requirements air cooled input ac power 90-260vac, 50-60hz dimensions (h x w x d) 8 ?? h x 17? w x 20? d rack mount enclosure current limit output ripple <1.5%
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