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QM48T45 Family DC-DC Converter Data Sheet
36-75 VDC Input; 1.0-3.3 VDC @ 45 A Output
Electrical Specifications (common to all versions)
Conditions: TA = 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
Operating Ambient Temperature
Storage Temperature
Continuous
0
-40
-55
80
85
125
VDC
°C
°C
Input Characteristics
Operating Input Voltage Range
36
48
75
VDC
Input Under Voltage Lockout
Non-latching
Turn-on Threshold
Turn-off Threshold
Input Voltage Transient
100 ms
33
31
34
32
35
33
100
VDC
VDC
VDC
Isolation Characteristics
I/O Isolation
Isolation Capacitance
Isolation Resistance
Feature Characteristics
Switching Frequency
2000
10
1.4
415
VDC
nF
M ?
kHz
Remote Sense Compensation
Output Voltage Trim Range 1
1
Industry-std. equations (3.3-1.5 V)
Use trim equation on Page 4
(1.2-1.0 V)
Percent of V OUT ( NOM )
-20
-10
+10
+10
+10
%
%
%
Output Overvoltage Protection
Overtemperature Shutdown (PCB)
Auto-Restart Period
Turn-On Time
Non-latching
Non-latching
Applies to all protection features
See Figs. F, G and H
117
128
125
100
4
140
%
°C
ms
ms
ON/OFF Control (Positive Logic)
Converter Off (logic low)
Converter On (logic high)
-20
2.4
0.8
20
VDC
VDC
ON/OFF Control (Negative Logic)
Converter Off (logic high)
Converter On (logic low)
2.4
-20
20
0.8
VDC
VDC
Additional Notes:
1
Vout can be increased up to 10% via the sense leads or up to 10% via the trim function. However, total output voltage trim from all sources
should not exceed 10% of V OUT ( NOM ), in order to ensure specified operation of overvoltage protection circuitry.
MCD10073 Rev. 1.0
Page 36 of 36
www.power-one.com
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