PCX150-50 データシートの表示（PDF） - Directed Energy, Inc. An IXYS Company

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PCX150-50

150A QUASI-CW LASER DIODE DRIVER/PULSED CURRENT SOURCE

Directed Energy, Inc. An IXYS Company 

PCX-150

THE PULSE OF THE FUTURE

150A QUASI-CW LASER DIODE

DRIVER/PULSED CURRENT SOURCE

• Output Current Up To 150A

• Output Voltage Up To 100V

• Rise Time < 10µs

• Pulse Width < 50µs to 5ms

• 5KHz Maximum Frequency

• Drives up to 50 diodes

simultaneously

• IEEE-488 (GPIB) and RS-232

Computer Interfaces

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

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 front-

panel display. In addition, the PCX-150 has a factory-set

hardware-controlled current-limit and an independent, user-

adjustable 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

6.5µs Rise, 9µs Fall

150A, 100V Output

25µs/Div horizontal scale,

25A/Div vertical scale

DIRECTED

ENERGY

INCORPORATED

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