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QMS DC-DC Series Data Sheet
Wide-Range Input, 70 to 82W Quarter-Brick Converters
Protections Specifications
All specifications apply over specified input voltage, output load, and @ 40 O C ambient temperature, unless otherwise noted.
Parameter
Conditions/Description
Min
Nom
Max
Units
Overcurrent Protection
Type
Non-latching – auto-recovery, hiccup type.
Threshold
QMS25DE
31.2
37.5
ADC
QMS14DG
QMS07DH
Vin = Vin NOM
16.8
8.8
22.4
11.5
ADC
ADC
Short Circuit
1
QMS25DE
QMS14DG
QMS07DH
Hiccup Mode
17
17
12
30
22
15
A RMS
A RMS
A RMS
Overvoltage Protection
Type
Threshold
2
Clamp, non-latching, hiccup mode. Independent control loop, auto-reset.
115 140 %Vo
Overtemperature Protection
Type
Non-latching, auto-recovery
Threshold
Temperature node: T C
3
135
? C
1
Refer to Figures 21, 22, 23.
2
Refer to Figures 24 – 29
3
Refer to Figure 36.
Feature Specifications
All specifications apply over specified input voltage, output load, and @ 40 O C ambient temperature, unless otherwise noted.
Parameter
Conditions/Description
Min
Nom
Max
Units
On/Off
1
Negative Logic (-N suffix)
(On/Off signal is low – converter is ON)
Converter ON
-0.7
0.8
VDC
On/Off (pin 2)
Sink current
1.0
mADC
(Primary side ref. to -Vin)
Converter OFF
Open circuit voltage
3.5
7
20
18
VDC
VDC
Positive Logic (-P suffix)
(On/Off signal is low – converter is OFF)
Converter ON
3.5
20
VDC
On/Off (pin 2)
(Primary side ref. to -Vin)
Open Circuit Voltage
Converter OFF
Sink current
7
-0.7
18
0.8
1.0
VDC
VDC
mADC
Remote Sense
Remote Sense Headroom
Trim Up
Trim Down
Output Voltage Trim
2
-10
10
10
%Vo
%Vo
%Vo
1
2
See Figure 30.
The output voltage of the units can be increased to a maximum of 10%. This is comprised of a combination of the remote-sense and trim
adjustment. Do not exceed 10% of Vonom between +Vout and –Vout terminals. Also refer to ”Output Voltage Adjust” section and
Figures 31 – 35 for clarification.)
MCD10143 Rev.1.1, 30--Aug-10
Page 7 of 20
www.power-one.com
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