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SQL48T20033 DC-DC Converter Data Sheet
36-75 VDC Input; 3.3 VDC @ 20A Output
Electrical Specifications (continued)
Conditions: T A = 25 oC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, unless otherwise specified.
Parameter
Notes
Min
Typ
Max
Units
Input Characteristics
Operating Input Voltage Range
36
48
75
VDC
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold
31.5
30
33.5
32
35.5
34
VDC
VDC
Lockout Hysteresis Voltage
Maximum Input Current
Input Standby Current
Input No Load Current (No load on the output)
3.3 Vout, Full Load @ 36VDC In
Vin = 48V, converter disabled
Vin = 48V, converter enabled
1.0
5
45
2.0
2.1
VDC
ADC
mADC
mADC
Input Reflected-Ripple Current,
Input Reflected-Ripple Current,
Input Voltage Ripple Rejection
ic
i S
Vin = 48V, 20 MHz bandwidth,
Full Load (resistive)
(See Fig. J)
@ 120 Hz
200
60
400
150
30
5
mA PK-PK
mA RMS
mA PK-PK
mA RMS
dB
Output Characteristics
Output Voltage Setpoint
V IN =48V, I OUT =0Amps, T A =25°C
3.25
3.3
3.35
VDC
Output Regulation
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise – 20 MHz bandwidth
I OUT =20Amps, T A =25°C
V IN =48V, , T A =25°C
Over line, load and temperature
I OUT =20Amps,
C EXT =10 μF tantalum + 1 μF ceramic
3.2
±2
±2
30
15
±17
±17
3.4
100
30
mV
mV
VDC
mV PK-PK
V RMS
External Load Capacitance
1
Plus Full Load (resistive)
C EXT
0
10,000
μF
ESR
1
mOhm
Output Current Range
0
20
ADC
Current Limit Inception
Non-latching
22
26
30
ADC
Short-Circuit Current
Pk:
RMS:
Non-latching Short = 10 m ?
30
5
10
Amps
A RMS
Dynamic Response
Load Change 50%-75%-50% of I OUT Max
Settling Time to 1% of V OUT
di/dt = 0.1 A/μ s
C EXT = 10μF tantalum + 1μF ceramic
di/dt = 1.0 A/μ s
C EXT = 470μF POS + 1μF ceramic
±50
±100
20
mV
mV
μs
Efficiency
@ 100% Load
@ 50% Load
48V IN , T A =25°C, 300LFM (1.5 m/s)
91
90
%
%
Additional Notes:
1
See “Input & Output Impedance” , Page 4.
Rev 0.2, 3-Mar-11
www.power-one.com
Page 3 of 14
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