DS_H48SR1R880_06272006
2
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS H48SR1R880NRFA
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
80 Vdc
Transient (100ms) 100ms 100 Vdc
Operating Device Temperature Tc -40 115 °C
Storage Temperature
-55 125 °C
Input/Output Isolation Voltage 1 minute 1500 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage
36 48 75 Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold
32.5 34 35 Vdc
Turn-Off Voltage Threshold
31 32 33.5 Vdc
Lockout Hysteresis Voltage
1 2 3 Vdc
Maximum Input Current 100% Load, 36Vin 5 A
No-Load Input Current 100 140 mA
Off Converter Input Current 15 25 mA
Inrush Current(I
2
t) 0.03 A
2
S
Input Reflected-Ripple Current
P-P thru 12µH inductor, 5Hz to 20MHz 10 mA
Input Voltage Ripple Rejection 120 Hz 60 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25°C 1.75 1.8 1.85
Vdc
Output Voltage Regulation
Over Load Io=Io,min to Io,max ±2 ±7 mV
Over Line Vin=36V to 75V ±2 ±5 mV
Over Temperature Tc=-40°C to 100°C ±20 ±50 mV
Total Output Voltage Range over sample load, line and temperature TBD TBD V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 70 120 mV
RMS Full Load, 1µF ceramic, 10µF tantalum 20 40 mV
Operating Output Current Range 0 80 A
Output DC Current-Limit Inception Output Voltage 10% Low 105 130 %
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 50 100 mV
Negative Step Change in Output Current 75% Io,max to 50% Io,max 50 100 mV
Settling Time (within 1% Vout nominal) 200 uS
Turn-On Transient
Start-Up Time, From On/Off Control 10 20 mS
Start-Up Time, From Input -40°C to +125°C 20 40
mS
Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 20000 µF
EFFICIENCY
100% Load
89 %
60% Load 90 %
ISOLATION CHARACTERISTICS
Input to Output 1500 Vdc
Isolation Resistance 10 MΩ
Isolation Capacitance 3000 pF
FEATURE CHARACTERISTICS
Switching Frequency 240 kHz
ON/OFF Control, (Logic Low-Module ON)
Logic Low Von/off at Ion/off=1.0mA 0 0.8 V
Logic High Von/off at Ion/off=0.0 µA 15 V
ON/OFF Current Ion/off at Von/off=0.0V 1 mA
Leakage Current Logic High, Von/off=15V 50 uA
Output Voltage Trim Range Across Pins 9 & 5, Pout <= max rated powe
0.8 1.9 V
Output Voltage Remote Sense Range Pout <= max rated power 10 %
Output Over-Voltage Protection Over full temp range; % of nominal Vout 115 130 155 %
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; Ta=25°C,airflow rate=300 LFM 1.41 M hours
Weight 66 grams
Over-Temperature Shutdown Power Region Temperature 130 °C
