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DS_E48SB12020_05222008
2
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER NOTES and CONDITIONS E48SB12020 (Standard)
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous 60 Vdc
Operating Temperature Refer to Figure 18 for the measuring point -40 128 °C
Storage Temperature -55 125 °C
Input/Output Isolation Voltage 2250 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage 38 48 55 Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold 35 36 37 Vdc
Turn-Off Voltage Threshold 33 34 35 Vdc
Lockout Hysteresis Voltage 1 2 3 Vdc
Input Over-Voltage Lockout
Turn-Off Voltage Threshold 57.5 58.5 59.7 Vdc
Turn-On Voltage Threshold 55.5 56.5 57.5 Vdc
Lockout Hysteresis Voltage 1 2 3 Vdc
Maximum Input Current 100% Load, 44V Vin 5.68 A
No-Load Input Current 85 100 mA
Off Converter Input Current 10 11 mA
Inrush Current (I
2
t) 0.02 A
2
s
Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 10 20 mA
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=48V, Io=no load, Ta=25°C 11.85 Vdc
Output Voltage Regulation
Over Load Io=Io,min to Io,max 300 400 mV
Over Line Vin=38V to 55V 4.3 4.5 V
Over Temperature Tc=-40°C to 105°C 250 mV
Total Output Voltage Range over sample load, line and temperature 8.9 13.75 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 80 100 mV
RMS Full Load, 1µF ceramic, 10µF tantalum 25 40 mV
Output current range when Vin below 44V 0 22.3 A
Operating Output Power Range
Output power range when Vin=44V and above 0 240 W
Output Current Protection Vin=38V to 55V 110 130 %
Current share accuracy (2 units in parallel) % of rated output current 10 %
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 0 mV
Negative Step Change in Output Current 75% Io.max to 50% Io.max 0 mV
Settling Time (Vo deviation recover to 10% of max
deviation)
0 us
Turn-On Transient
Start-Up Time, From On/Off Control 100% Load 10 16 ms
Start-Up Time, From Input 100% Load 16 28 ms
Maximum Output Capacitance 3000 µF
EFFICIENCY
100% Load 96.3 %
60% Load 95.8 %
ISOLATION CHARACTERISTICS
Input to Output 2250 Vdc
Isolation Resistance 10 MΩ
Isolation Capacitance 1000 pF
FEATURE CHARACTERISTICS
Switching Frequency 190 kHz
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On) Von/off -0.7 0.8 V
Logic High (Module Off) Von/off 2 18 V
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off) Von/off -0.7 0.8 V
Logic High (Module On) Von/off 2 18 V
ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 0.25 0.3 mA
Leakage Current (for both remote on/off logic) Logic High, Von/off=15V 30 uA
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; 2.01 M hours
Weight 31.76 grams
Over-Temperature Shutdown Refer to Figure 18 for the measuring point 130 °C