LDY High Power Diode Laser Drivers
The LDY series is a new family of OEM laser diode drivers with all the performance of Lumina’s flagship LDD line of laser diode drivers, as well as additional functions including pulsing capability, over-temperature sensing and crowbar shorting of the output.
The LDY series is ideal for high power applications where economy is important and performance cannot be compromised. Compact size is possible due to the low-loss Zero Voltage Switching inverter and incorporation of planar magnetics. The LDY is virtually wire free.
Power factor is greater than 0.99 and conducted emissions meet stringent European regulations. No additional line filter is required to meet EN 55011 emission requirements. The LDY family has been designed with the knowledge that a high power laser diode is an expensive device. Rise and fall times are strictly controlled to reduce high voltage transients which could damage the laser diode.
ADVANTAGES
400µs. rise/fall time
Safe turn-on/turn-off
Compact design
Power factor correction
Auxiliary +15V/-15V/+5V
Low conducted emissions, low leakage
ROHS Compliant
CONFIGURATIONS:
Output current up to 100A
Maximum output voltage to 200V
Analog interface
Universal input for all world voltages
CE and safety agency approved
Model
Poutmax
Ioutmax
Input Voltage
Size (L x W x H)
LDY-600-XX-YY
600 Watts
100 amps
100 to 240VAC ± 10%
9.9" x 7.3"x 2,6"
25.1 x 18.5 x 6.6 cm
LDY-1000-XX-YY
1000 Watts
LDY-1500-XX-YY
1500 Watts
200 to 240VAC ± 10%
LDY-2500-XX-YY
2500 Watts
150 amps
13.0" x 8.5" x 3.43"
32.9 x 21.6 x 8.7cm
Note: XX = maximum required output current, YY= maximum required compliance voltage
Specifications
INPUT
Voltage:
See table above
Frequency:
47 to 63 Hz
Power Factor:
>.98
INTERFACE
Connector:
15 Pin “D” Sub Female
Current Program:
0-10V for 0-Max Current
Current Monitor:
0-10V for 0-Max Current
Voltage Monitor:
0-10V for 0-Max Voltage
PERFORMANCE
Rise/Fall Time:
~1msec.
Current Regulation:
<0.5% of Maximum output current
Current Ripple:
<0.5% of maximum output current
Current Overshoot:
<1% of maximum output current
Power Limit:
Limited to maximum power with power fold-back circuit
ENVIRONMENT
Operating Temp:
0 to 40°C
Storage:
-20 to 85°C
Humidity:
0 to 90% non-condensing
Cooling:
Forced air
REGULATORY
Safety:
LDY-600/1000/1500: UL60950 (Industrial), UL60601-1 (medical)
Emissions/Immunity: FCC 47 CFR Class A Emissions, EN55011:1998 Group 1
Class A Emissions, EN61000-3-2, EN61000-3-3, EN60601-1-2:2001
AUXILIARY OUTPUTS
+5V @ 200mA
+15V @ 200mA
-15V @ 200mA
Note: The LDY series has the capability to be configured for output voltages to 200 volts. Consult Customer service for details.
LDY-INTERFACE
CONNECTOR TYPE: 15 PIN D-SUB FEMALE
Pin #
Pin Name
Functional Voltage Level
Description
1
Enable (input)
(Note: 1)
High = RUN = +5V to +15V
Low = OFF = 0V
The Enable function turns the output section of the power
supply ON and OFF. When the power supply is enabled,
current is delivered to load as programmed via Ipro-
gram(+), Pin 7. Rise times resulting from Enable are ap-
proximately 25msec.
2
Crowbar Status(output)
(LDD-600/1000/1500
Only)
High = Crowbar ON = +5V
Low = Crowbar OFF = 0V
(More information on page 4)
The Crowbar Status reports the status of the shorting
crowbar clamp across the output. The crowbar will short
the output when the output is not ENABLED via Pin 1, or
if the output is ENABLED via pin 1 but the control circuitry
has detected a no- load condition or a voltage requirement
on the output that exceeds the maximum voltage rating of
the unit.
3
Interlock (Input)
Open = OFF
Connect to GND = RUN
The Interlock function can be connected to external inter-
lock switches such as door or overtemp switches.
4,9, 15
GND
In terface Return
5
Vout Monitor (output)
0-10V = 0-Voutmax (note:2)
The output voltage of the supply can be monitored by
Vout Monitor. See note below
6
Iout Monitor (output)
0-10V = 0-Ioutmax
The output current of the supply can be monitored by Iout Monitor.
7
Iprogram (input)
0-10V = 0-Ioutmax
The power supply output current is set by applying a
0-10V analog signal to Iprogram(+).
8
Pulse Control (input)
TTL High = On
TTL Low = Off
Default = Off
The output of the LDY power supply may be pulsed by
applying a TTL signal to Pulse Control, pin 8. The am-
plitude of the output current pulse is determined by the
current level programmed via Pin 7, Iprogram(+). Rise
fall times of 400µsec. are possible.
10
+5V (output)
Auxiliary 200mA
11
Over-temp Warning
TTL High = High Temp
TTL Low = Temp OKt
LDY-600/1000/1500 only
LDY-2500 = +5V, 200mA
When temperature of main heat sink exceeds 65 Deg C,
Pin 11, the Over-Temp Warning, will go to a TTL High to
indicate unit is in danger of shutting down due to over-
temperature condition. When temperature of main heat
sink exceeds 75 Deg C, unit will shut down.
12
-15V (output)
Auxiliary 200mA
13,14
+15V (output)
Auxiliary 200mA
1. Upon application of AC input voltage output current will be 0 regardless of Pin 1 setting. Enable (or toggle) pin 1 to output current.
2. Pin 5 If maximum compliance voltage is less than 10V, Vout Monitor will read output voltage directly. If maximum compliance volt age is greater than 10V, then Vout Monitor will be scaled such that 0-10V = 0-Voutmax. Applying a program voltage to pin 7 greater than 10.5 volts will latch power supply. Output current will not exceed 105% of rating.
Pulsed Operation:
The LDY series power supplies can be pulsed using the Pulse Pin # 8 (see the interface descriptions on page 3). The standard rise time of ~1ms can be shortened to 400us depending upon the maximum compliance voltage selected. When ordering please specify the "FR" option in the part number.
Example: LDY-1000-XX-YY-FR.
The graph (figure 1) shows typical rise times for compliance volt- ages from 2 volts to 60 volts.
Adjustable Output Current:
The LDY-600/1000/1500 power supplies include an internal DIP switch array which may be set to limit the maximum current. This is useful when an OEM customer would like to use a single model for a variety of systems, but has a laser diode system which does not require the maximum output current. In this type of situation, it is important to protect the laser diode from an over-program error which could damage the laser diode. The selection chart below shows the various DIP switch setting to reduce the output current from I out max.
The LDY-2500 uses pin 2 as the current limit. The default if left unconneted is 105% of maximum rated output current. Applying 0 to 10 volts adjusts the maximum output current from 0 to 105%
Note: When using the dip switches on the LDY-600/1000/1500 or pin 2 on the LDY-2500 to reduce the output current, the scaling factor of the program pin (7) does not change. Expample: If you reduce the maximum output current of an LDY-1000-100-10 to 74% or 74 amps voltages above 7.4volts applied to pin 7 will not change the output current.