TM
Technical Specification
S25-48-3.3, S25-48-3.3N
48Vin 3.3Vout 7A
Electrical Specifications
Ta=25°C, Vin=48V unless otherwise noted.
PARAMETER
Absolute maximum rating
Input voltage
Operating case temperature
Storage temperature
Humidity
NOTES
MIN
TYP
MAX
UNIT
0
-40
-55
80
100
125
95
V
°C
°C
%
Input characteristics
Operating input voltage range
36
48
35
75
V
V
Turn on voltage threshold
Turn off voltage threshold
34
100
0.83
20
V
Transient withstand
Transient duration: 100ms
100% load , 36Vin
48Vin
V
Maximum input current
Off converter input current
A
mA
Output characteristics
Output voltage set point
Output voltage line regulation
Output voltage load regulation
Output voltage trim range
Output voltage ripple and noise
Output over power protection
Over-voltage protection
Over-temperature protection
Temperature coefficient
Capacitive Load
3.3
V
36~75 Vin
±0.3
±0.5
±10
100
140
4.7
%
10%-100%Load
%
%
20Mz bandwidth, 100% Load, 48Vin
50
mV(pk-pk)
100
4.1
120
%
V
100
50
°C
±0.04
%/°C
mF
0
100,000
Output dynamic characteristics
Startup time
Transient recovery time
Transient peak deviation
5% to 95% of the output voltage
25% load change
25% load change
100
800
2
ms
ms
%Vo
Efficiency (see efficiency curve)
100% load efficiency
48 Vin
86
%
Isolation characteristics
Isolation voltage (primary to secondary ) 1minute
1500
1000
1000
VDC
VDC
VDC
MW
pF
Isolation voltage (primary to case)
Isolation voltage (secondary to case)
Isolation resistance
1minute
1minute
500VDC, Primary to secondary
Primary to secondary
10
Isolation capacitance
1000
275
Feature Characteristics
Switching frequency
225
250
KHz
ON/OFF control (Positive logic)
Converter On
S25-48-3.3
3
-1
7
1.2
V
V
Converter Off
ON/OFF control (Negative logic)
Converter On
S25-48-3.3N
-1
3
1.2
7
V
V
Converter Off
Output voltage trim range
Calculated MTBF
Weight
Percentage of normal output
-10
900,000
+10
%
Hrs
g(oz)
Bellcore @ 50°C
28(1.0)
Broadband TelCom Power, Inc. – 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 3 of 11
Tel.: 714-259-4888 • Fax: 714-259-0840 • www.btcpower.com • Email: sales@btcpower.com PS S25-48-3.3 Rev 3 16-1-04
BTCPOWER [ BROADBAND TELCOM POWER, INC. ]
