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SQM48 Series Data Sheet
SemiQ
TM
Family 25A DC-DC Converters
Electrical Specifications (common to all versions)
Conditions: T A =25oC, Airflow=300 LFM (1.5 m/s), Vin=48 Vdc, All output voltages, 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
160
435
Vdc
pF
M ?
kHz
Output Voltage Trim Range
1
Industry-std. equations (2.5 - 1.5 V)
Use trim equation on Page 4 (1.2 V)
-20
-10
+10
+10
%
%
Remote Sense Compensation
1
Percent of V OUT ( NOM )
+10
%
Output Over-Voltage Protection
Over-Temperature Shutdown (PCB)
Auto-Restart Period
Non-latching
Non-latching
Applies to all protection features
117
122
125
100
127
%
°C
ms
Turn-On Time
ON/OFF Control (Positive Logic)
3
ms
Converter Off
Converter On
-20
2.4
0.8
20
Vdc
Vdc
ON/OFF Control (Negative Logic)
Converter Off
2.4
20
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 insure specified operation of over-voltage protection circuitry.
MCD10085 Rev. 1.1, 08-Jul-10
Page 2 of 30
www.power-one.com
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