TM
Technical Specification
S25-48-3.3, S25-48-3.3N
48Vin 3.3Vout 7A
Turn-On Transient Waveforms
Efficiency Curves
90
85
80
75
70
36V
48V
75V
1.4
2.8
4.2
5.6
7
Output current (A)
Fig 11. Efficiency vs. output current at various Input voltage
The ambient temperature is 25°C.
Fig 9. Startup under positive logic control at Vin=48v, Iout
=5A. Ch2: ON/OFF signal (1V/div) , Ch1: Output voltage
(2V/div), Co=10mF tantalum capacitor + 1mF Ceramic
capacitor, time scale: 200ms/div
90
85
80
25°C
40°C
75
55°C
70
1.4
2.8
4.2
5.6
7
Output current (A)
Fig 12. Efficiency at nominal input (48V) vs. load at different
ambient temperatures of 25°C, 40°C, 55°C without air flow,
the input voltage is 48V.
Fig 10. Startup under negative logic control at Vin=48v, Iout
=5A. Ch1: ON/OFF signal (5V/div) , Ch2: Output voltage
(2V/div), Co=10mF tantalum capacitor + 1mF Ceramic
capacitor, time scale: 200ms/div
Broadband TelCom Power, Inc. – 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 9 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. ]
