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TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS S36SS3R304NRFA
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
70 Vdc
Transient (100ms) 100ms 100 Vdc
Operating Temperature Refer to Figure 16 for the measuring point -40 105 °C
Storage Temperature
-55 125 °C
Input/Output Isolation Voltage 1 minute 1500 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage
18 60 V
Input Under-Voltage Lockout
Turn-On Voltage Threshold
16 17 18 V
Turn-Off Voltage Threshold
15 16 17 V
Lockout Hysteresis Voltage
0.5 1.5 2.5 V
Input Over-Voltage Lockout
Turn-0ff Voltage Threshold
64 V
Turn-on Voltage Threshold
63 V
Maximum Input Current 100% Load, 18Vin 1.3 A
No-Load Input Current 30 mA
Off Converter Input Current 4
m
A
Inrush Current(I
2
t) 1 A
2
s
Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 5 mA
Input Voltage Ripple Rejection 120 Hz 55 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Vin=48V, Io=50%Io.max, Tc=25℃
3.23 3.30 3.37
V
Output Voltage Regulation
Over Load Io=Io,min to Io,max ±5 ±15 mV
Over Line Vin=18V to 60V ±2 ±7 mV
Over Temperature
Tc=-40℃ to 100℃
100 300
pp
m/℃
Total Output Voltage Range Over sample load, line and temperature 3.16 3.44 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 60 100 mV
RMS Full Load, 1µF ceramic, 10µF tantalum 15 25 mV
Operating Output Current Range 0 4.5 A
Output DC Current-Limit Inception Output Voltage 10% Low 5 6 8 A
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 100% Io,max 65 100 mV
Negative Step Change in Output Current 100% Io,max to 50% Io.max 65 100 mV
Settling Time to 1% of Final value 600 µs
Turn-On Transient
Start-Up Time, From On/Off Control 6 10 ms
Start-Up Time, From Input 5 10
ms
Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 2000 µF
EFFICIENCY
100% Load
78 81 %
ISOLATION CHARACTERISTICS
Isolation Voltage 1500 V
Isolation Resistance 100 MΩ
Isolation Capacitance 500 pF
FEATURE CHARACTERISTICS
Switching Frequency 280 kHz
ON/OFF Control, (Logic Low-Module ON)
Logic Low Von/off at Ion/off=1.0mA 0 0.7 V
Logic High Von/off at Ion/off=0.0 µA 2 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
A
cross Trim Pin & +Vo or
–
Vo, Pout≦max rated
-10 +10 %
Output Over-Voltage Protection(Hiccup) Over full temp range; % of nominal Vout 115 125 140 %
GENERAL SPECIFICATIONS
Calculated MTBF Io=80% of Io, max; Tc=40°C 4.5 M hours
Weight (Open Frame) 12.5 grams
2