TDK-Lambda PAQ100S48-1R2, Инструкция по эксплуатации

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PAQ
-S48
PAQ
B-239
・All specifications are subject to change without notice.
Reverse input connections
Reverse input polarity would cause module damage.
For cases where reverse connections are possible, con-
nect a protective diode and fuse. Use protective diode
with higher voltage rating than the input voltage, and with
higher surge current rating than the fuse.
−Vin
＋Vin
−V
＋V
Load
Fuse
Fig.1-5 Protection for Reversed Input Connection
2 Output Voltage Adjustment Range
Output voltage could be adjusted within the range de-
scribed below by external resister or variable resistor. How-
ever, take note that OVP might trigger when output voltage
adjustment exceeds the ranges indicated below.
Output Voltage Adjustment Range
3.3V, 5V:
–15% to ＋15% of nominal output voltage
1.2V, 1.8V, 2.5V: –20% to ＋10% of nominal output voltage
When increasing the output voltage, reduce the output cur-
rent accordingly so as not to exceed the maximum output
power.
For 3.3V and 5V output models, take note that when out-
put voltage is increased, input voltage range is limited as
show in fig.2-1.
Also, when output voltage is decreased under output ad-
justment range, output voltage will shut off.
Remote sensing is possible even when output voltage is
varied. For details on remote sensing function, please refer
to “9. Remote Sensing.”
55
36
35 40 45 50
110
100
90
120
Input Voltage (VDC)
3.3V, 5V Model
1.2V, 1.8V, 2.5V Models
Output voltage (%)
Fig.2-1 Limit of Input Voltage
Output Voltage Adjustment by external resistor or
by variable resistor
（1）In case of adjusting output voltage lower
（1-1）Available maximum output current = rated output
current
（1-2） Connect an external resistor Radj (down) between
the TRM terminal and -S terminal.
Load
PAQ
Series
＋
−
Radj (down)
−S
−V
＋V
＋S
TRM
Fig.2-2 Connection for output voltage trim down
（1-3）Equation of external resistor and output voltage
Radj (down): Value of external resistor
Δ(%): Output voltage change rate against
nominal output voltage
1.2V model
Radj (down)=
〔
5.777×100（%）
−10.887
〕
［kΩ］
Δ（%）
1.8V, 2.5V, 3.3V, 5V model
Radj (down)=
〔
5.11×100（%）
−10.22
〕
［kΩ］
Δ（%）
Below graph is relation Δ(%) and value of external resistor.
1
10
100
1000
0 10 20 30
Change in Output Voltage（%)
Radj (down) (k
Ω
)
1.2V
Except1.2V
Fig.2-3 Δ(%) vs. Radj (down)
（2） In case of adjusting output voltage higher
（2-1） Allowable maximum output current = value of
output power÷output voltage (Reduce maximum
output current in specification.)
（2-2） Connect an external resistor Radj (up) between
TRM terminal and +S terminal
Load
PAQ
Series
＋
−
Radj (up)
−S
−V
＋V
＋S
TRM
Fig.2-4 Connection for output voltage trim up
（2-3） Equation of external resistor and output voltage
Vo : nominal output value of module
Radj (up) : external adjustment resistor
Δ(%) : Output voltage change rate against
nominal output voltage
1.2V model
Radj （up）=
〔 8.665×Vo（100（%）＋Δ（%））
−
5.777×100（%）
−10.887
〕
[kΩ]
1.225×Δ（%） Δ（%）
1.8V, 2.5V, 3.3V, 5V model
Radj（up）=
〔 5.11×Vo（100（%）＋Δ（%））
−
5.11×100（%）
−10.22
〕
[kΩ]
1.225×Δ（%） Δ（%）