TM
Technical Specification
S25-48-3.3, S25-48-3.3N
48Vin 3.3Vout 7A
Thermal De-Rating Curve
Dynamic Response Waveform
8
7
6
5
4
3
2
1
0
0LFM
100FM
200LFM
50 55 60 65 70 75 80 85 90
Ambient Temperature(°C)
Fig 15. Maximum output current vs. temperature. Both the
input and output voltages are nominal.
Fig 13. Dynamic response of load step at Vin=48v, Ch1:
output voltage change(100mv/div), Ch2: output current step
of 50%-75%-50% (2A/div). Current slew rate:0.1A/ms,
Co=10mF tantalum capacitor + 1mF Ceramic capacitor, time
scale: 1ms/div
Over Current Protection Curve
Output Ripples and Noise Waveform
Fig 16. Output voltage vs current showing current limit point
and converter shut down point
Fig 14. Output voltage Ripple & Noise at Vin=48v, Iout=5A
Co=10mF tantalum capacitor + 1mF Ceramic capacitor, ch1:
20mV/div, time scale: 2ms/div.
Broadband TelCom Power, Inc. – 1719 S. Grand Avenue, Santa Ana, CA 92705 U.S.A. P 10 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. ]
