the pulse of the future directed energy incorporated PCO-7110 pulsed laser diode driver module compact, economical oem module 4a to 120a output 4ns to 65ns pulse width repetition frequency single-shot to 50khz diodes may be mounted directly on the PCO-7110, eliminating the need for interconnect cables or striplines pulsed current monitor output the PCO-7110 is a compact, economical oem laser diode driver module designed to provide extremely fast, high current pulses to drive laser diodes in range finder, lidar, atmos- pheric communications and other applications requiring high current, nanosecond pulses. six standard models are offered in the PCO-7110 product line, providing pulse currents ranging from 4a to 120a, and pulse widths from 4 nanoseconds to 65 nanoseconds, at frequencies as high as 50khz. custom pulse width and output current con- figurations are available for oem applications C contact dei for more information. mounting pads are provided to mount the laser diode directly to the driver, eliminating the need for interconnect cables or striplines. the four-hole mounting pattern accepts to-18, to- 5, to-52, 5.6mm, and 9mm packages (eg&g optoelectronics r, s, t and u packages), as well as other packages of similar dimensions and lead spacing, mounted perpendicular to the driver circuit board. to facilitate different packages and mount- ing preferences, there are two solder pads on the end of the board to accept various laser diode packages mounted on axis to the driver. furthermore, the diode can be connected re- motely from the driver using a low-impedance stripline inter- connection between the mounting pads and the leads of the laser diode. a current monitor output may be viewed with an oscilloscope, providing a straight-forward means to observe the diode cur- rent waveform in real-time. the PCO-7110 driver provides high-speed performance, a ro- bust design, flexible mounting configurations and the ability to drive a wide range of laser diodes in a small package. these fea- tures provide the user with an economical oem module with the flexibility to be readily designed into a wide range of products. technical overview the PCO-7110 uses mosfet transistors as the main switching element. unlike avalanche transistor drivers, neither the power mosfet or the gate drive transistor of the PCO-7110 are oper- ated in breakdown, but instead are controlled via their gates. this design provides a high degree of reliability, excellent switching performance, and superior amplitude and temporal stability over a broad operating temperature range. the driver requires three inputs: a ttl trigger, +15vdc support power, and a high voltage dc input (+195v or +495v maximum, depending upon the driver model). the output current depends upon the available charge of the drivers pulse forming network. this charge is directly proportional to the applied voltage. there- fore it is possible to vary the output of the PCO-7110 by varying the input high voltage amplitude. the output current can be varied over a large range with little variation in pulse width. protection circuitry is designed into the PCO-7110 to protect the driver against excessively long input trigger signals and support power supply transients and over-voltage conditions. additionally, high speed clamp diodes are incorporated into the output network to protect the laser diode against reverse voltage conditions.
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 specifications PCO-7110 model 40-4 50-15 90-30 100-7 120-15 45-65 pulse output current range (controlled by input high volt- age amplitude) 4a to 40a 5a to 50a 5a to 90a* 5a to 100a* 5a to 120a* 4a to 45a maximum dc input voltage +195v +400v pulse width (fwhm at maximum output current) 4ns 1ns 15ns 2ns 30ns 3ns 7ns 1ns 15ns 2ns 65ns 3ns rise time (10% - 90%, typical) <2ns 2.5ns <3ns 2.5ns 2.5ns 35ns maximum prf (pulse recurrence frequency), cw at maxi- mum output current, controlled by input trigger 50khz 11khz 1khz 5khz** 2khz 1.5khz jitter (1st sigma) <1ns <2ns throughput delay (delay from input trigger to output pulse) 33ns typical 55ns typ. maximum overshoot at maximum output current 4% output current monitor 10a/v into 50 ohms trigger in +5v/50 w , 50-100ns pulse width support power +15v at 2ma mechanical length 2.45 in. (62.2mm) width 1.0 in. (25.4mm) height 0.3 in. (7.5mm) 0.5 in. (12.7mm) weight (approximate) 10 grams 12 grams 14 grams operating temperature -20 o c to+85 o c a ll specifications measured into a shorted output and measured with the internal current monitor specifications subject to change without notice ? laser diode not included * maximum output current must be derated by 15% at operating temperatures above 60 o c ** maximum current must be limited to 90a at frequencies above 2.5khz. +495v model 100-6 typical output waveform 6ns pulse width, 102a output (10ns/div horizontal scale, 20a/div vertical scale) model 45-65 typical output waveform 65ns pulse width, 48a output (50ns/div horizontal scale, 10a/div vertical scale) model 50-15 typical output waveform 15ns pulse width, 56a output (10ns/div horizontal scale, 10a/div vertical scale) model 120-15 typical output waveform 15ns pulse width, 120a output (10ns/div horizontal scale, 20a/div vertical scale) model 40-4 typical output waveform 4ns pulse width, 45a output (10ns/div horizontal scale, 10a/div vertical scale) optional accessories: pca-9210 connector kit mating connectors for signal and power inputs and current monitor pca-9140 current monitor cable assembly 50 ohm cable with connectors to connect current monitor to an oscilloscope, 3 feet in length 1820-0030 low-impedance stripline to remotely connect PCO-7110 to the laser diode doc #9200-0214 rev 3 ? 2000 directed energy, inc.
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