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參數(shù)資料
| 型號： | D48S1238-2D |
| 元件分類： | 電源模塊 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, MODULE-7 |
| 文件頁數(shù)： | 6/13頁 |
| 文件大?。?/td> | 476K |
| 代理商： | D48S1238-2D |
DS_D48S1238-2_04142009
2
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted;
PARAMETER
NOTES and CONDITIONS
D48S1238 (Standard)
Min.
Typ.
Max.
Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
43
48
57
Vdc
Operating Case Temperature (open frame)
Please refer to Figure13
-40
110
°C
Operating Case Temperature (with heatspreader)
Please refer to Figure14
-40
90
°C
Storage Temperature
-40
125
°C
Input/Output Isolation Voltage
1 minute
2250
Vdc
INPUT CHARACTERISTICS
Operating Input Voltage
43
48
57
Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold
42
Vdc
Turn-Off Voltage Threshold
40
Vdc
Lockout Hysteresis Voltage
2
Vdc
Maximum Input Current
100% Load, 43Vin
12.5
A
No-Load Input Current
TBD
mA
Off Converter Input Current
TBD
mA
Inrush Current(I
2t)
TBD
A
2s
Input Reflected-Ripple Current
P-P thru 12H inductor, 5Hz to 20MHz
TBD
mA
Input Voltage Ripple Rejection
120 Hz
TBD
dB
OUTPUT CHARACTERISTICS
Initial Set Point Accuracy
Vin=51.4V, Io=20A
12.19
12.21
Vdc
Output Voltage Regulation
Over Load
Io=Io,min to Io,max
11.4
12.6
Vdc
Over Line
Vin=43V to 57V
11.4
12.6
Vdc
Total Output Voltage Range
over load, line and temperature
11.4
12.6
Adc
Output Voltage Ripple and Noise
Cout 2200F x2 (max ESR 20 m) with 10F Tantalum &
0.47F Ceramic cap. 5Hz to 20MHz Bandwidth
35
70
mVp-p
Operating Output Current Range
3.75
38
A
Output DC Current-Limit Inception
Output Voltage 10% Low
105
130
%
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
48V, 2200Fx2pcs load cap, 0.1A/s
Positive Step Change in Output Current
50% Io.max to 75% Io.max
11.4
12.6
Vdc
Negative Step Change in Output Current
75% Io.max to 50% Io.max
11.4
12.6
Vdc
Settling Time (within 1% Vout nominal)
TBD
uS
Turn-On Transient
Start-Up Time, From On/Off Control
From On/Off falling edge to 10%Vo,set
0
10
mS
Start-Up Time, From Input
From 90% of Vin to Vo = 10%Vo,set
10
40
mS
Rise Time
10% of Vo to 90% of Vo
1
30
mS
Capacitive Loading
For D48S1238-2 A/E
1000
25000
F
For D48S1238-2C
4400
25000
F
Overshoot at Turn-On/Turn-Off
Vin=48V, Io=min-max
TBD
Vdc
PROTECTION
Short Circuit Protection
Withstand continuous short-circuit, latch mode
Over Current Protection (OCP)
Vin=48V, Vo=12V shall exist for at least 250ms ~ 1Sec
105
130
% of Io
Over Voltage Protection (OVP)
Vin=48V
12.9
14.2
Vdc
EFFICIENCY
100% Load
Vin=48V, Vo=12V, Io=38A
94.5
%
ISOLATION CHARACTERISTICS
Input to Output
2250
Vdc
Isolation Resistance
10
M
Isolation Capacitance
1000
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
0.8
V
Logic High (Module Off)
Von/off at Ion/off=0.0 A
15
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
Power Good Assertion Time
From 90% of Vo to Power Good fell to ground
1
10
mS
Power Good out of regulation
From 90% of Vo (falling) to Power Good rise
0
2
mS
GENERAL SPECIFICATIONS
MTBF
Io=80% of Io, max; Tc=40°C
1
M hours
Io=80% of Io, max; Tc=25°C
1.3
Weight
With heatspreader
61
grams
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