PCA-9155 [DEI]

Pulsed/CW Laser Diode Driver Module;


型号：	PCA-9155
厂家：	Directed Energy
描述：	Pulsed/CW Laser Diode Driver Module
文件：	总2页 (文件大小：289K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PCO-6131 Pulsed/CW Laser Diode Driver Module Datasheet

output approximately 75 W is continuously

dissipated in the driver to maintain the current in

the energy storage inductor.

This architecture provides a high-performance

driver in a small form factor, with high operating

efficiency and low stored energy. At 125 A

output current, the stored energy in the driver is

approximately 7 Joules, dramatically lower than

the stored energy in comparable linear current

sources.

System Operation

The PCO-6131 requires user-supplied +24 VDC

support power, a CMOS (+5 V) gate signal, and

a TTL-level enable/disable signal. The high

current output is derived from the +24 VDC input.

The output pulse width and frequency are

controlled by the gate signal. The output current

Precision Pulse Control

The PCO-6131 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 1 A to 125 A, pulse widths variable from

<100 ns to DC, and pulse repetition frequencies

variable from single-shot to 500 KHz at duty

cycles up to 100%.

amplitude is controlled by

potentiometer.

PCB-mount

To protect the laser diode and the driver, circuitry

is incorporated into the driver that disables the

output if the +24 VDC support power drops below

18 V. Clamp diodes are incorporated into the

output network to protect the laser diode against

reverse voltage conditions.

The PCO-6131 features

user-adjustable

variable rise time control. This innovative feature

allows the user to adjust the rise time within a

range of <30 ns to >2.5 µs by means of a PCB-

mounted potentiometer, to optimize the driver’s

rise time for the user’s application.

The rugged, compact design and high-power

capability of the PCO-6131 make it an excellent

OEM choice for driving high power laser diodes.

The PCO-6131 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.

The PCA-9155 optional current monitor is a 0.002

Ohms resistor with a 50 Ohm series termination.

When terminated into 50 Ohms, the output is the

equivalent of a 0.001 Ohm resistor with scaling of

1000 A/V and can be viewed with an oscilloscope

providing a straight-forward means to observe the

diode current waveform in real-time.

The

resistor is in the negative lead and the BNC shield

is connected to the negative out.

Ordering Information

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.

PCO-6131

PCA-9160

PCA-9155

Diode Driver Module

1-Meter Output Stripline Cable

Optional Current Monitor Board

The PCO-6131 is provided with a mating I/O

connector and sockets, and a 1-meter output

stripline cable assembly.

No power is dissipated in the driver until it is

enabled. When enabled, at 125 A maximum

For more information: 970.493.1901 or sales@directedenergy.com

PCO-6131 Pulsed/CW Laser Diode Driver Module Datasheet

Pulse Amplitude

Output Current Range

Means Of Adjustment

0 A to 125

Trimpot mounted on PCB, or

external 0-5 V or 0-10 V Analog Voltage, jumper-selectable.

Output Polarity

Pulse Rise Time

Positive

Variable <30 ns to >2.5 µs

(10%-90%) , user-adjustable trimpot mounted on PCB

Pulse Width

<100 ns to DC

Pulse Frequency Range

Maximum Duty Cycle

Output Pulse Ripple/Droop

Jitter

Single Shot to 500 KHz

100%

~2 A, (<2% at 125 A output)

<3 ns First Sigma

>75% at 50% duty cycle, 125

A output

Efficiency

Output Connector

High Current DSUB, PCB-

Mounted

<30 ns Rise Time, < 750 ns Fall Time, 120 A Output

Diode Forward voltage

Amplitude

20 V maximum

Gate Input

Type

Gate Input

Positive Edge Trigger

+5 V CMOS

Current Monitor Optional PCA-9155

Current Monitor

1000 A/V terminated into 50 Ω

±3% of the actual current

BNC

Current Monitor Connector

Control Functions

Output Enable/Disable

TTL Input, High = Enabled

General

Input Power

+24 VDC ±10% unregulated

0°C to 40°C

Air cooled

<100 ns Minimum Pulse Width, 125 A Output

Operating Temperature

Cooling

Dimensions (H X W X D)

8.4 cm x 20.3 cm x 16.5 cm

Specifications are subject to change without notice.

*The idle power consumption (power consumed when the

driver is enabled but not pulsing) varies non-linearly with

output current, and can be approximated by the formula

_IDLE=I² x 0.023 where I is the output current setpoint. When

pulsing, the switching losses (P_SW) are about 30 W. Therefore

the 24 VDC power requirements can be approximated by the

formula P_SW+ [I_OUTV_OUT+ I_OUT²(0.030)]DutyCycle + P_IDLE(1-

DutyCycle) where V_OUTis the diode forward voltage and DC is

the duty cycle. For example, at 40 A output current, 10 V diode

voltage and 30% duty cycle, the power consumption is 30W +

[40A x 10V + 40A² x 0.03] x 0.3 + [40A² x 0.023] x (1-.3) =

190W. The +24 VDC support power should be sized to

provide this average power.

500 KHz Frequency, 125 A Output

For more information: 970.493.1901 or sales@directedenergy.com

PCA-9155 [DEI]

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