48V, 12W, PoE Power Supply, IEEE 802.3af Compliant
FEATURES
37V to 57V PSE Input
12V Output Voltage
1A Load Current
No Optocoupler Feedback
Over-Current Protection
Over-Temperature Protection
Over-Voltage Protection
Minimal External Components
Do-It-Yourself Option Available
ORDERING INFORMATION
Part Number
Input Voltage
(V)
37 - 57
Output Voltage Output Current
(V)
(A)
12
1
Efficiency
Up to 85%
Power Derating
V
IN
= 48V, V
OUT
= 12V
Natural Convection
ELECTRICAL CHARACTERISTICS
Input Voltage Range
Output Voltage Set Accuracy
Output Voltage Ripple
Line Regulation
Load Regulation
Efficiency
I
OUT
= 1A, Include Input Bridge
I
OUT
= 1A
I
OUT
= 1A
V
IN
Continuous
37V to 57V
±4% (Typ.)
180mV (Typ.)
±0.5% (Typ.)
±0.2% (Typ.)
84.5%
140kHz (Typ.)
10mA
0 to 85°C
V
IN
on to V
OUT
Regulated
MIL-HDBK-217F
110ms (Typ.)
4185x10
3
hrs
Efficiency vs. Load Current
V
IN
= 37V, 48V, and 57V, V
OUT
= 12V
Switching Frequency
Minimum Output Current
Operating Temperature
Range
Start-Up Time
Calculated MTBF
NOTE:
All electrical characteristics are tested under 25°C ambient temperature, V
IN
= 3.3V unless otherwise noted.
www.MonolithicPower.com
3/1/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
Preliminary Specifications Subject to Change
© 2017 MPS. All Rights Reserved.
1
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