IXYS PCO-6130 Datasheet

THE PULSE OF THE FUTURE

DIRECTED
ENERGY
INCORPORATED

PCO-6130 PULSED/CW LASER
DIODE DRIVER MODULE

•

Economical OEM Module

•

0A To 125A Output

•

20V Maximum Output Voltage

•

2.5kW Maximum Average Output
Power

•

User-Adjustable Variable Rise Time

•

<600ns To DC Pulse Width

•

Repetition Frequency Single-Shot
To 250KHz

•

Current Monitor Output

The PCO-6130 is a compact, OEM-style high power
pulsed current source designed to drive diode lasers, bars
and arrays in pulsed, QCW or CW modes. It delivers out­put current variable from 1A to 125A, pulse widths
variable from <600ns to DC, and pulse repetition
frequencies variable from single-shot to 250KHz at duty
cycles up to 100%.

The PCO-6130 features a user-adjustable variable rise
time control. This innovative feature allows the user to ad­just the rise time within a range of <200ns to >5µs by
means of a PCB-mounted potentiometer, to optimize the
driver’s rise time for the user’s application.

The PCO-6130 is based on a hysteretic, average current,
switch-mode regulator. This type of regulator is a variable
frequency, variable pulse width design which maintains
current in an energy storage inductor between a minimum
and maximum level. The ripple is limited to the minimum
and maximum current determined by the hysteretic con­troller. The regulator is started when the TTL "enable" line
is taken high and runs as long as the enable is high. The
use of the hysteretic regulator provides a large input range
and high efficiency.

A shunting switch shorts the output of the regulator until
output current is needed. The pulse is generated by
opening the shunt switch for the length of the input pulse.
The pulse rise and fall times are then limited only by the
stray/parasitic capacitance and inductance of the shunting
switch and output leads.

No power is dissipated in the driver until it is enabled.
When enabled, at 125A maximum output approximately
75W is continuously dissipated in the driver to maintain
the current in the energy storage inductor (see note #1 on
next page for more information).

This architecture provides a high performance driver in a
small form factor, with high operating efficiency and low
stored energy. At 125A output current, the stored energy
in the driver is approximately 7 Joules, dramatically lower
than the stored energy in comparable linear current
sources.

The PCO-6130 requires user-supplied +24VDC support
power, a CMOS (+5V) gate signal, and a TTL-level en­able/disable signal. The high current output is derived
from the +24VDC DC input. The output pulse width and
frequency are controlled by the gate signal. The output
current amplitude is controlled by a PCB-mount potenti­ometer. A current monitor output may be viewed with an
oscilloscope, providing a straight-forward means to ob­serve the diode current waveform in real-time.

To protect the laser diode and the driver, circuitry is in­corporated into the driver that disables the output if the
+24VDC support power drops below 18V. Clamp diodes
are incorporated into the output network to protect the
laser diode against reverse voltage conditions.

The PCO-6130 is available in two options. Option A is
mounted on an air-cooled heatsink. Option B (pictured
above) is provided without the heatsink, and must be
mounted to a user-supplied heatsink or cold plate capa­ble of dissipating approximately 100W.

The rugged, compact design and high power capability of
the PCO-6130 make it an excellent OEM choice for driv­ing high power laser diodes.

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: [phone]

Email: [e-mail]
Web: http://www.directedenergy.com

Doc #9200-0225 Rev 2
© 2001 Directed Energy, Inc.

Typical Output Waveform

25us Pulse Width, 120A Output

(5µµµµs/Div horizontal scale, 20A/Div vertical scale)

PARAMETER VALUE
PULSE OUTPUT CURRENT

Amplitude Range 0A to 125A
Means Of Adjustment Trimpot mounted on PCB, or external 0-5V or 0-10V

Analog Voltage Program, jumper-selectable

Output Polarity Positive
Pulse Rise Time Variable from <200ns to >5µs (10%-90%) , user-

adjustable through trimpot mounted on PCB

Pulse Width <600ns to DC
Pulse Recurrence Frequency Range Single Shot to 250KHz
Maximum Duty Cycle 100%
Output Pulse Ripple/Droop

<2% at 125A output, 10µs pulse width
Over/undershoot <5%
Jitter <3ns First Sigma
Efficiency >75% at 50% duty cycle, 125A output

(1)

Output Connector High Current DSUB, PCB-Mounted

DIODE FORWARD VOLTAGE

Amplitude 20V maximum

GATE INPUT

Type Positive Edge Trigger
Gate Input +5V CMOS

CURRENT MONITOR OUTPUT

Current Monitor

1000A/1V terminated into 50Ω, ±3% of the actual

current
Current Monitor Connector SMB, PCB-Mounted

CONTROL FUNCTIONS

Output Enable/Disable TTL Input, High = Enabled

Input Power +24VDC unregulated

(2)

Operating Temperature 0C to 40C
Cooling Option A (with heatsink): Air cooled

(3)

Option B (without heatsink): Cold plate capable of

dissipating ~75W at 125A output current

(1)

Dimensions (H X W X D) Option A: 6” x 8” x 2.7” (15.2cm x 20.3cm x 6.9cm)

Option B: 6.25” x 8” x 1.5” (15.9cm x 20.3cm x 3.8cm)

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

GENERAL

<200ns Rise Time, <600ns Fall Time,

120A Output

(500ns/Div horizontal scale, 20A/Div vertical scale)

<600ns Minimum Pulse Width,

120A Output

(500ns/Div horizontal scale, 20A/Div vertical scale,

measured at the lo ad)

Specifications

250KHz Frequency, 120A Output

(2.5µµµµs/Div horizontal scale, 20A/Div vertical scale)

(1) At 125A output, the driver dissipates ~75W when enabled but not pulsing. Efficiency is therefore the ratio of output

power to the idle power consumption. The idle power consumption vari es non-linearly with output current, and can be
approximated by the formula P=I

2

x 0.005 where I is the output current. For example, at 75A output current, the idle

power consumption is 75

2

x 0.005 = 28W.

(2) The +24VDC support power should be sized for the average output power (Power x Duty Cycle) plus the idle power

consumption, as defined above.

(3) Model number PCO-6130 Option A is mounted on an air-cooled heatsink. Option B requires a customer-supplied

heatsink or cold plate capable of dissipating ~75W (when the driver is operated at 125A output, see #1 above).