DS_H48SA12025_05052008
2
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS H48SA12025 (Standard)
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
80 Vdc
Transient (100ms) 100ms 100 Vdc
Operating Device Temperature(Openframe) Please refer to fig24. for the measuring point -40 122 °C
Operating Device Temperature(Heatspreader) Please refer to fig25. for the measuring point -40 109 °C
Storage Temperature
-55 125 °C
Input/Output Isolation Voltage 2250 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage
36 48 75 Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold
32.5 34 35.5 Vdc
Turn-Off Voltage Threshold
30.5 32 33.5 Vdc
Lockout Hysteresis Voltage
1 2 3 Vdc
Maximum Input Current Vin=36V, 100% Load 9.5 A
No-Load Input Current 170 240 mA
Off Converter Input Current 18 mA
Inrush Current(I
2
t) With 100uF external input cap 1 A
2
S
Input Terminal Ripple Current RMS, With 100uF/0.1ohm input cap, 100% Load 0.42 A
Input Reflected-Ripple Current Pk-Pk, thru 12µH inductor, 5Hz to 20MHz, 100% Load 7 mA
Input Voltage Ripple Rejection 120 Hz 50 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Vin=48V, Io=Io.max, Tc=25℃
11.82 12 12.18 Vdc
Output Voltage Regulation
Over Load Io=Io,min to Io,max ±10 mV
Over Line Vin=36V to 75V ±10 mV
Over Temperature
Tc=-40℃ to 100℃
±120 mV
Total Output Voltage Range over sample load, line and temperature 11.64 12.36 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak 100% Load, 1µF ceramic, 10µF tantalum 60 120 mV
RMS 100% Load, 1µF ceramic, 10µF tantalum 30 60 mV
Operating Output Current Range Full input range 0 25 A
Operating Output Power Range Full input range 0 300 W
Output DC Current Protection Full input range 110 150 %
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Positive Step Change in Output Current 50% Io,max to 75% Io,max 400 mV
Negative Step Change in Output Current 75% Io,max to 50% Io,max 400 mV
Settling Time (within 1% Vout nominal) 400 uS
Turn-On Transient
Start-Up Time, From On/Off Control 12 28 mS
Start-Up Time, From Input 12 28 mS
Maximum Output Capacitance 100% Resistor load; 5% overshoot of Vout at startup 10000 µF
EFFICIENCY
100% Load Vin=48V 93.2 %
60% Load Vin=48V 92.5 %
ISOLATION CHARACTERISTICS
Input to Output 2250 Vdc
Isolation Resistance 10 MΩ
Isolation Capacitance 1500 pF
FEATURE CHARACTERISTICS
Switching Frequency 300 kHz
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On) Von/off -2 1.2 V
Logic High (Module Off) Von/off 3 18 V
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off) Von/off -2 1.2 V
Logic High (Module On) Von/off 3 18 V
ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 0.3 mA
ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=3V 10 uA
Leakage Current(for both remote on/off logic) Logic High, Von/off=15V 100 uA
Output Voltage Trim Range Pout <= max rated power 9.6 13.2 V
Output Voltage Remote Sense Range Pout <= max rated power 10 %
Output Over-Voltage Protection Over full input range; Over full temp range 115 140 %
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; Ta=25°C,airflow rate=300 LFM 1.5 M hours
Weight Open frame 80 grams
Over-Temperature Shutdown(Openframe) Please refer to Fig 24. for the measuring point 127 °C
Over-Temperature Shutdown(Heatspreader) Please refer to Fig 25. for the measuring point 116 °C
