Delta Electronics Q48DC - Manual (Page 2)

DS_Q48DC12003_03112008 2
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER NOTES and CONDITIONS Q48DC12003NR A
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous 80 Vdc
Transient 100ms 100 Vdc
Operating Temperature Refer to Figure 20 for measuring point -40 124 °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 33.5 35 Vdc
Turn-Off Voltage Threshold 29 30.5 32 Vdc
Lockout Hysteresis Voltage 2 3 4 Vdc
Maximum Input Current 100% Load, 36Vin 2.4 A
No-Load Input Current 50 mA
Off Converter Input Current 10 mA
Inrush Current(I 2 t) 1 A 2 s
Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 20 mA
Input Voltage Ripple Rejection 120Hz 66 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=48V, lo=lo. Max, Tc=25℃ Vout 1,2 ± 11.98 ± 12.10 ± 12.22 V
Output Voltage Regulation
Over Load lo1=lo2=lo, min to lo, max Vout 1,2 ± 20 ± 180 mV
Over Line Vin=36V to 75V,Io1=Io2=full load Vout 1,2 ± 20 ± 120 mV
Cross Regulation | Io1-Io2| <20% Io,max ± 360 mV
Over Temperature Tc=-40℃ to 129℃, Io1=Io2= Io, min to Io, max ± 120 mV
Total Output Voltage Range Over all load, line and temperature ± 11.74 ± 12.46 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Io1, Io2 Full Load, 1µF ceramic, 10µFtantalum Vout 1, 2 40 80 mV
RMS Io1, Io2 Full Load, 1µF ceramic, 10µF tantalum Vout 1, 2 10 30 mV
Operating Output Current Range Vout 1, 2 0 2.7 A
Output DC Current-Limit Inception Iout 1＋ lout 2 7.1 9 A
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Vout 1 400 600
Positive Step Change in Output Current
Iout1 or Iout2 from50% Io, max
to 75% Io, max Vout 2 400 600
mV
Vout 1 400 600
Negative Step Change in Output Current
Iout2 or Iout1 from 75% Io,max
to 50% Io, max Vout 2 400 600
mV
Cross dynamic ± 120 ± 360 mV
Settling Time (within 1% Vout nominal) 100 us
Turn-On Transient
Delay Time, From On/Off Control 2 ms
Delay Time, From Input 2 ms
Start-up Time, From On/Off Control 20 30 ms
Start-up Time, From Input 20 30 ms
Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 5000 µF
EFFICIENCY
100% Load Iout1, Iout2 full load 88 %
60% Load Iout1, Iout2 60% of full load 86.5 %
ISOLATION CHARACTERISTICS
Input to Output <1 minute 2250 Vdc
Isolation Resistance 10 MΩ
Isolation Capacitance 1500 pF
FEATURE CHARACTERISTICS
Switching Frequency 330 kHz
ON/OFF Control, (Logic Low-Module ON)
Logic Low Von/off at Ion/off=1.0mA -0.7 1.8 V
Logic High Von/off at Ion/off=0.0 µA 3.5 12 V
ON/OFF Current Ion/off at Von/off=0.0V 1 mA
Leakage Current Logic High, Von/off=15V 300 uA
Output Voltage Trim Range Pout ≦ max rated power (65W) -17 +5 %
Iout ≦ max 120% rated Iout -25 -17 %
Output Over-Voltage Protection Over full temp range; %of nominal Vout 124 130 150 %
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; Ta=40°C TBD M hours
Weight 31 grams
Over-Temperature Shutdown Refer to Figure 20 for measuring point 129 °C