DS_S24SA1R812_05092006
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=200 LFM, V
in
=24Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS S24SA1R812NRFA
Min. Typ. Max. Units Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
-0.3 50 Vdc
Operating Temperature Please refer to Fig. 18 For measuring point -40 110 °C
Storage Temperature
-55 125 °C
Input/Output Isolation Voltage 2250 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage
18 24 36 V
Input Under-Voltage Lockout
Turn-On Voltage Threshold
17 18 V
Turn-Off Voltage Threshold
13 15 V
Lockout Hysteresis Voltage
1 2 3 V
Maximum Input Current 100% Load, 18Vin 2.2 A
No-Load Input Current 50 mA
Off Converter Input Current 7
m
Inrush Current(I
2
t) 0.01 A
2
s
Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 5 mA
Input Voltage Ripple Rejection 120 Hz 50 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Vin=24V, Io=50%Io.max, Ta=25℃
1.77 1.80 1.83
V
Output Voltage Regulation
Over Load Io=Io,min to Io,max ±2 ±10 mV
Over Line Vin=18V to36V ±2 ±5 mV
Over Temperature
Ta=-40℃ to 85℃
100 300
m/℃
Total Output Voltage Range Over sample load, line and temperature 1.73 1.87 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 20 50 mV
RMS Full Load, 1µF ceramic, 10µF tantalum 5 15 mV
Operating Output Current Range 0 12 A
Output DC Current-Limit Inception Output Voltage 10% Low 13.2 18 A
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient 24V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Positive Step Change in Output Current 50% Io,max to 75% Io,max 30 75 mV
Negative Step Change in Output Current 75% Io,max to 50% Io.max 30 75 mV
Settling Time to 1% of Final value 200 µs
Turn-On Transient
Start-Up Time, From On/Off Control 12 ms
Start-Up Time, From Input 12
ms
Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 2200 µF
EFFICIENCY
100% Load
87.5 %
ISOLATION CHARACTERISTICS
Isolation Voltage 2250 V
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 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
Leaka
e Current Lo
ic Hi
h
Von/off=15V 50 u
Out
ut Volta
e Trim Ran
e
cross Trim Pin & +Vo or
Vo
Pout≦max rated
-10 +10 %
Output Over-Voltage Protection(Hiccup) Over full temp range; % of nominal Vout 115 160 %
GENERAL SPECIFICATIONS
Calculated MTBF Io=80% of Io, max; Ta=25°C, Airflow=200LFM 5.7 M hours
Weight 18 grams
Over-Temperature Shutdown Please refer to Fig.18 For measuring point 115 °C
2
