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DS_E48SR1R825_05222008
2
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted)
PARAMETER NOTES and CONDITIONS E48SR1R825 (Standard)
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous 75 Vdc
Transient (100ms) 100ms 100 Vdc
Operating Temperature Refer to fig. 21 for the measuring point -40 107 °C
Storage Temperature -55 125 °C
Input/Output Isolation Voltage 1500 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage 36 75 Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold 33 34 35 Vdc
Turn-Off Voltage Threshold 31 32 33 Vdc
Lockout Hysteresis Voltage 1.5 2 2.5 Vdc
Input Over-Voltage Lockout
Turn-Off Voltage Threshold 100 105 107 Vdc
Turn-On Voltage Threshold 97 102 104 Vdc
Maximum Input Current 100% Load, 36Vin 1.5 A
No-Load Input Current 40 mA
Off Converter Input Current 4 mA
Inrush Current (I
2
t) 1 A
2
s
Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 15 mA
Input Voltage Ripple Rejection 120 Hz 60 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25°C 1.773 1.8 1.827 Vdc
Output Voltage Regulation
Over Load Io=Io, min to Io, max ±3 ±10 mV
Over Line Vin=36V to 75V ±3 ±10 mV
Over Temperature Tc=-40°C to 85°C ±15 mV
Total Output Voltage Range Over sample load, line and temperature 1.764 1.836 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 40 75 mV
RMS Full Load, 1µF ceramic, 10µF tantalum 12 25 mV
Operating Output Current Range 0 25 A
Output DC Current-Limit Inception Output Voltage 10% Low 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 80 mV
Negative Step Change in Output Current 75% Io.max to 50% Io.max 80 mV
Settling Time (within 1% Vout nominal) 150 us
Turn-On Transient
Start-Up Time, From On/Off Control 7.5 ms
Start-Up Time, From Input 7.5 ms
Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 15000 µF
EFFICIENCY
100% Load 90.5 %
60% Load 90 %
ISOLATION CHARACTERISTICS
Input to Output 1500 Vdc
Isolation Resistance 10 MΩ
Isolation Capacitance 1500 pF
FEATURE CHARACTERISTICS
Switching Frequency 350 kHz
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On) Von/off at Ion/off=1.0mA 0.7 V
Logic High (Module Off) Von/off at Ion/off=0.0 µA 2 18 V
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off) Von/off at Ion/off=1.0mA 0.7 V
Logic High (Module On) Von/off at Ion/off=0.0 µA 2 18 V
ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 1 mA
Leakage Current (for both remote on/off logic) Logic High, Von/off=15V 50 uA
Output Voltage Trim Range
Across Pins 9 & 5, Pout ≦ max rated power
-10% 10% %
Output Voltage Remote Sense Range
Pout ≦ max rated power
10 %
Output Over-Voltage Protection Over full temp range; % of nominal Vout 2.2 V
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; Tc=40°C 4.54 M hours
Weight 19.6 grams
Over-Temperature Shutdown Average PCB Temperature 119 °C