Our L28 standard series DC input power supplies are designed to drive HeNe lasers up to 15mW. Each L28 provides greater than 75% efficiency and, therefore, typically does not require additional heat sinking. Units in the AE power range do, however, provide approximately 7.5 square inches of heat sink. See below for additional information on power ranges.
L28101
The L28101 is a standard DC input power supply designed for OEM integration. The unit has an input voltage of 22-30VDC and is available in four power ranges from 2.5 to 25W.
Specifications
AL*
AM*
AH*
AE*
Dimensions, W x L x H, in. [mm]
1.50 x 3.75 x 1.00 [38.10 x 95.25 x 25.40]
Input voltage (VDC)
22 - 30
22 - 30
22 - 30
22 - 30
Starting voltage (kV)**
>8
>10
>10
>10
Output power (W)
2.5 - 7
5 - 10
9 - 17
16 - 25
Output voltage (VDC)
900 - 1600
1300 - 2000
1700 - 3000
2500 - 3500
Output current (mA)
2.5 - 5
3.5 - 6
4.5 - 7
6 - 7.5
Output current ripple (%)
<1 P-P@ nominal voltage
<1 P-P@ nominal voltage
<1 P-P@ nominal voltage
<1 P-P@ nominal voltage
Efficiency (%)
>75
>75
>75
>75
Temperature (°C)
-20 to +50
-20 to +50
-20 to +50
-20 to +50
Approximate tube output (mW)
1
1 - 3
2 - 5
5 - 15
*See below for a description of these power ranges.
**At nominal input voltage.
L28101 typical installation
Power Ranges For AC & DC Power Supplies
We offer AC and DC input power supplies in a variety of power ranges. The following labeling system is used to denote a particular power range.
Power ranges (DC input units)
Power ranges (AC input units)
L
low power
I
very low power
M
medium power
D
low power
H
high power
No letter
standard power
E
special high power unit with 39% more output power capability than an "H" power range unit
E
special high power unit with 39% more output power capability than a standard unit
Please note: To indicate that the high voltage return lead is at ground potential, an "A" should appear before each letter above. For example, "AH" tells us not only that the high voltage return lead is at ground, but that the power range is high. Ground can be either negative or positive.
