IXYS PCX-6220 Datasheet
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 < 50µµµµs 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 <50µs to 20ms, and pulse repetition frequencies
variable from single shot to 5KHz at duty cycles up to 50%.
A microprocessor-controlled front-pa nel and RS-232/IEEE- 4 88
interface provide individual control of each ele ctro nic functi o n,
while the backlit alphanumeric LCD display provides immediate
visual confirmation of all operating para meter s, inc lud ing 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
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.
PCX-6220
150A 40V QUASI-CW LASER DIODE
DRIVER/PULSED CURRENT SOURCE
20% Duty Cycle.
150A, 40V Output
250µs/Div
horizontal scale,
25A/Div vertical
scale
20ms Pulse, 150A, 40V Output
2.50ms/Di v horizontal scale,
25A/Div vertical scale
50µµµµs Min. Pulse Width
150A, 40V Output
10µs/Div horizontal scale,
25A/Div vertical scale
THE PULSE OF THE FUTURE
Directed Energy, Inc.
An IXYS Compa ny
2401 Research Blvd., Suite 108
Fort Collins, CO USA 80526
970-493-1901 Fax: 970-493-1903
Email: deiinfo@direct ed ener g y.c om
Web: http://www.directedenergy.com
9200-0220 REV 3
S
PECIFICATIONS 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.
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
<25µs (10%-90%)
Pulse Fall Time
<25µs (10%-90%)
Pulse Width
50µs 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
<25µs (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 50Ω
Minimum Trigger Pulse Width 100ns
Input Trigger Connector BNC, Front Panel
SYNC MONITOR OUTPUT
Sync Monitor
TTL output into 50Ω
Sync Monitor Connector BNC, Front Panel
CURRENT MONITOR OUTPUT
CVR Monitor
50A/1V into 1 MegΩ, typically within 1% of the displayed actual current
CVR Monitor Connector BNC, Front Panel
VOLTAGE MONITOR OUTPUT
Voltage Monitor
10V/1V into 1 MegΩ, 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 ¾” H x 17” W x 20” D Rack mount enclosure
CURRENT LIMIT
Output Ripple <1.5%
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