HPP-6000 Laser Diode Pulser
The HPP-6000 laser diode pulser is a new concept in pulsed diode driver development. Designed to be used with the LDD series drivers as the power source, the HPP pulser can deliver up to 1000 amps of output current with full protection of the laser diode. Pulse widths of ≥50µs to CW can be acheived with rise/fall times of <15µs. and repetition rates to 5kHz. A CW simmer current of up to 12 amps is available.
Control of the HPP pulser via the standard 15 pin analog/TTL interface includes inputs for enable, trigger, output current, simmer voltage and CW/pulsed operation. The output is fully protected against open and short circuits along with overtemp.
THe HPP pulser enhances Lumina Power's complete line of laser diode driver products from 10 watts to 6000 watts.
ADVANTAGES
• Pulsed current to 1000 amps
• 6kW average output power
• Compliance Voltage: 10 to 150V
• ≤15µs. Rise/Fall time
• Advanced diode protection
• CW simmer mode available
• >90% Efficiency
• Continuously modulate current,
pulse width and frequency
Specifications:
INPUT
Voltage:
12 to 150VDC
Power Source:
Modified LDD-series laser diode driver (HP or VP Option)
OUTPUT
Power:
≤6000W Average Power
Pulse widths
~50µs to CW
Output Voltage:
10 to 150 Volts.
Output Current:
1000 amps maximum
Efficiency:
>90% at full output
Regulation:
0.5% @100Hz
Rise Time:
<15µs (Voltage/Current dependant)
INTERFACE
Connector:
15 Pin “D” Sub Female
Voltage Program:
0-10V for 0-Max Voltage
Voltage/current Monitors:
0-10V for 0-Max Voltage
Pulse Input:
TTL
Temperature Fault
TTL
Option Simmer
12 amps max
ENVIRONMENT
Operating Temp:
0 to 40°C
Storage:
-20 to 85°C
Humidity:
0 to 90% non-condensing
Cooling:
Forced air
Output Cable:
36" (91cm) Custom low inductance flatstrip cable
DIMENSION:
13.8" x 9.27" x 3.93" (35 x 23.5 x 10cm)
NOTE: The HPP-6000 pulser is designed to be powered by a modified LDD series CW laser diode driver. Consult factory for exact LDD/HPP combinations for your application.
Due to the potential for ground loops between the LDD and HPP-6000 interfaces an isolator is required. Use Lumina Power supply Isolator part number 11001377.
HPP Interface or Isolator
Pin #
Pin Name
Function/voltage,Level
Description
1
Pulse Control (input)
TTL High = On
TTL Low = Off
Default = Off
Pulse the output of the HPP by applying a TTL signal toPulse Control, pin 1.
2,3
Ground
Interface Return
4
Temp Monitor
TTL High = Fault
Internal heatsink temp switch, setpoint 75ºC
5
I out Monitor (output)
0-10V = 0 - Ioutmax
The output current of the supply can be monitored by Iout Monitor. Real time measurment.
6
I Program (input)
0-10V = 0 - Ioutmax
The power supply output current is set by applying a0-10V analog signal to Iprogram(+).
7
Poor Load Match
TTL High = Fault
When the voltage compliance of the diode laser load is not between 75% to 100% of the
specified voltage compliance, the output is disabled and this fault is trans- mitted. This
fault may be reset three times. If the fault persists after three resets, the unit will disable
the output until input voltage is removed and applied again. Note: this pin is only active
when the output current is more than 50 %
8
Auto Voltage Adjust Return
Internal Function
Floating Return for Pin 13
10
CW/Pulsed Mode
TTL High = CW
Switch between CW & Pulsed operation
11
+15V (output)
Auxiliary +15 Volts, 200mA to Isolator Input
12
Ready Signal
5 to 15V= Ready
Power Supply is ready
13
Auto Voltage Adjust
Internal Function
Automatically adjusts the output voltage of the LDD
power supply for optimal efficiancy if load voltage varies.
14
Enable
High = RUN = +5V to+15V
Low = OFF = 0V
Default= Off
The Enable function turns the output section of the power supply ON and OFF. When the
power supply is enabled, Pin 1 pulse control is operational and current is delivered to load
as programmed via Iprogram(+)
15
Interlock
Open = OFF Connect to
GND = RUN
The Interlock function can be connected to external interlock switches such as a door or
overtemp switches. Voltage must be less than 3 V.
Note:1. Pin 9 = Simmer (bias) current control if this option is ordered. 0 to 10V = 0 to10amps.
Pulse Characteristics & Input Voltage Requirements
The scope trace below is an example of the waveforms that can be achieved with the HPP Pulser. This is a 300 amp, 45V pulse. The rise time is 11.42µs and the fall time is 10.86µs with virtually no overshoot on the leading edge of the waveform.
The unique topology of the HPP pulser allows for a wide range of pulse widths from ~50µs through CW without any droop or rolloff near the falling edge of the pulse.
The relationship between the output voltage of the LDD power supply and the load voltage of the HPP Pulser must be set for the proper amount of overhead. For optimal waveforms and maximum efficiency the input volt- age of the HPP Pulser must be 2 to 3 volts higher than the output voltage. Conversely, input voltages that are 8 volts above the output voltage will shutdown the HPP Pulser.
Note: The LDD or LDN series CW power supplies are idea current sources for the HPP Pulser. These power supplies interact with the Pulser for the optimal overhead voltage and maximum efficiency. Other options are available