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SQL48T20033 DC-DC Converter Data Sheet
36-75 VDC Input; 3.3 VDC @ 20A Output
Electrical Specifications
Conditions: T A = 25 oC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, unless otherwise specified.
Parameter
Notes
Min
Typ
Max
Units
Absolute Maximum Ratings
Input Voltage
Continuous
Transient (100ms)
-0.3
80
100
VDC
VDC
Operating Temperature
Storage Temperature
1
(See Derating Curves)
Ambient (T A )
Component (T C )
Baseplate (T B )
-40
-40
-40
-55
85
120
105
125
°C
°C
°C
°C
Isolation Characteristics
I/O Isolation
Isolation Capacitance
Isolation Resistance
Input to Baseplate
Output to Baseplate
Feature Characteristics
Switching Frequency
2,250
10
1,500
1,500
270
445
VDC
pF
M ?
VDC
VDC
kHz
Output Voltage Trim Range
2
Industry-std. equations
3
-20
+10
%
Remote Sense Compensation
2, 4
Percent of V OUT ( NOM )
+10
%
Output Overvoltage Protection
Over Temperature Shutdown
Auto-Restart Period
Non-latching
Non-latching
Applies to all protection features
120
125
200
140
%
°C
ms
Turn-On Time from Vin
Turn-On Time from ON/OFF Control
ON/OFF Control (Positive Logic option)
ON/OFF Control (Negative Logic option)
Time from UVLO to Vo=90%V OUT ( NOM )
Resistive Load
Time from ON to Vo=90%V OUT ( NOM )
Resistive Load
Converter Off (logic low)
Converter On (logic high)
Converter Off (logic high)
Converter On (logic low)
-20
2.4
2.4
-20
5
5
20
20
0.8
20
20
0.8
ms
ms
VDC
VDC
VDC
VDC
Additional Notes:
1
2
3
4
Reference Figure H for component (T C and T B ) locations.
Vout can be increased up to 10% via the sense leads or up to 10% via the trim function. However, the total output voltage trim-up should
not exceed 10% of V OUT ( NOM ).
Trim equations are defined within this document’s “Operations” section.
When using remote sense a minimum of 100uF ceramic capacitance should be mounted between Vout(+) and Vout(-) close to pin 8 and
pin 4.
Rev 0.2, 3-Mar-11
www.power-one.com
Page 2 of 14
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