EMERSON LPT25 Service Manual
Rev. 02.05.07
LPT25 Series
1of 3
Embedded Power for
Business-Critical Continuity
LPT25 Series
25 Watts
Special Features
• Universal input
• 3" x 5" footprint
• Less than 1U high
• Remote sense on main output
• Terminal block option (-T)
• Built-in EMI filter
• Low output ripple
• Adjustable main output
• Overvoltage protection
•Overload protection
• 110 KHz switching frequency
• LPX40 enclosure kit available
• 2 year warranty
Total Power: 25 - 40 Watts
Input Voltage: 85 - 264 VAC
120 - 300VDC
# of Outputs: Triple
Electrical Specifications
Safety
Input
Input range
85-264 VAC
120-300 VDC
Frequency 47-440 Hz
Inrush current
<15A peak @ 115VAC;
<30A peak @ 230VAC, cold start @ 25°C
Input current
1 A max. (RMS) @ 115 VAC
Efficiency
70% typical at full load
EMI
FCC Class B conducted; CISPR 22 Class B conducted
EN55022 Class B conducted;
VDE 0878 PT3 Class B conducted
Safety ground
leakage current
<0.5 mA @ 50/60 Hz, 264 VAC input
Output
Maximum Power 25W for convection; 40W with 30CFW forced air
Cross regulation
±2% on output 1; ±5% on outputs 2, 3
Adjustment range
-5, +10% minimum
Hold-up time
20 ms @ 25 W load, 115 VAC nominal line
Overload protection
Short circuit protection on all outputs. Case overload pro-
tected @ 110% to 145% above peak rating
Overvoltage protection
5.7 to 6.7 VDC on the main output
Remote sense Compensates for 0.5 V lead drop min. Will operate without
remote sense connected. Reverse connection protected.
VDE 0805 EN60950
11774-3336-1241
(LC#84936)
UL UL60950
E132002
CSA CSA 22.2-234 Level 3
LR53982C
NEMKO EN 60950/EMKO-TUE
P95100411
(74-sec) 203
CB Certificate and report
1569, 1570, 1571, 1572
CE Mark (LVD)
RoHS
Rev. 02.05.07
LPT25 Series
2of 3
Embedded Power for
Business-Critical Continuity
Ordering Information
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33
LPT22(-T) 5V
12V
-12V
0.3A
0.1A
0A
3A
1.5A
0.5A
4A
2A
0.7A
5A
3A
1A
±2%
±5%
±5%
50mV
120mV
120mV
LPT23(-T) 5V
12V
-12V
0.4A
0A
0A
4A
0.5A
0.5A
5A
0.7A
0.7A
6A
1A
1A
±2%
±5%
±5%
50mV
120mV
120mV
LPT24(-T) 5V
12V
-5V
0.3A
0.1A
0A
3A
1.5A
0.5A
4A
2A
0.7A
5A
3A
1A
±2%
±5%
±5%
50mV
120mV
50mV
LPT25(-T) 5V
15V
-15V
0.3A
0.1A
0A
3A
1.5A
0.5A
4A
2A
0.7A
5A
2A
1A
±2%
±5%
±5%
50mV
150mV
150mV
1. Peak current lasting <30 seconds with a maximum 10% duty cycle.
2. At 25°C including initial tolerance, line voltage, load currents and output voltages adjusted to factory settings.
3. Peak-to-peak with 20 MHz bandwidth and 10 μF in parallel with a 0.1 μF capacitor at rated line voltage and load ranges.
4. Minimum Loads are required.
5. (-T) indicates Terminal Block option for input and output (instead of Molex type).
Operating temperature: 0° to 50°C ambient derate each output at 2.5% per degree
from 50° to 70°C, -20°C start up.
Electromagnetic
susceptibility:
Designed to meet IEC 801, -2, -3, -4, -5, -6, Level 3
Humidity: Operating; non-condensing 5% to 95%
Vibration: Three orthogonal axes, sweep at 1 oct/min, 5 min. dwell
at four major resonances 0.75G peak 5 Hz to 500 Hz,
operational
Storage temperature: -40° to 85°C
Temperature coefficient: ±.04% per °C
MTBF demonstrated: >550,000 hours at full load and 25°C ambient conditions
Environmental Specifications
Power Derating Curve
Output
Power
(Watts)
0°C
10W
20W
30W
40W
10°C 20°C 30°C 40°C 50°C 60°C 70°C
TA – Ambient Temperature – °C
0W
Natural
Convection
Cooling
20W
12.5W
25W
30 CFM Forced Air Cooling
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