FEB 14, 2006 revised to MAY 17, 2006 Page 4 of 14 www.power-one.com
HKS48T30120 DC-DC Series Data Sheet
Half-Brick with 48VDC Input; 12VDC @ 32A Output
General Specifications
All specifications apply over specified input voltage, output load, and @ 40
O
C ambient temperature, unless
otherwise noted.
Parameter Conditions/Description Min Nom Max Units
Output Current I
rated
0 32 ADC
@ 200LFM, 55
O
C
AMBIENT
23 ADC
Current Derating
1
@ 200LFM, 70
O
C
AMBIENT
20.2 ADC
Efficiency
2
(T
AMB
=40°C)
Vin
NOM
, I
O
= I
RATED
94.5 %
Operating (output ripple) Frequency Fixed frequency 260 kHz
150
1.25
300
2.5
mVp-p
% Vo
Output Ripple
3
Over line and load,
T
AMB
= 0°C to 85°C
(DC to 20MHz)
50 100 mV
RMS
Turn-on Overshoot
4
Overall input voltage, load,
and temperature conditions
0 0 %Vout
Turn-On Time
4
(via application of input voltage)
Time from Vin=UVLO to
regulation band
20 100 ms
Turn-On Time
4
(via On/Off signal)
Time from enable to
regulation band
16 100 ms
Rise Time
4
From 10 to 90% of Vout
NOM
16 30 ms
Admissible Load Capacitance 220
14,000
5
μF
1
See Figure 17.
2
See Figure 3.
3
See Figures 8 & 9.
4
See Figure 4, 5 & 6.
5
10/90% mix of ceramic / low ESR tantalum capacitors or OS-CON
Protections Specifications
All specifications apply over specified input voltage, output load, and @ 40
°
C ambient temperature, unless
otherwise noted.
Parameter Conditions/Description Min Nom Max Units
Overcurrent Protection
Type Non-latching – auto-recovery, hiccup type.
Threshold Vin = Vin
NOM
33 40 ADC
Short Circuit
1
Hiccup Mode 13.5 18 A
RMS
Overvoltage Protection
Type Latching, recycle input voltage or ON/OFF signal to unlatch
Threshold
2
Vin = Vin
NOM
, Iout = I
RATED
14.15 14.6 15.25
VDC
Overtemperature Protection
Type Non-latching, auto-recovery
Threshold PCB temperature 120 130
°C
Hysteresis 10
°C
1
Refer to Figure 11.
2
Refer to Figure 12 & 13.
