PAQ50S48-1R8 TDK Corporation, PAQ50S48-1R8 Datasheet - Page 15

• Manufacturer Part Number: PAQ50S48-1R8
• Description: LAMBDA PART
• Manufacturer: TDK Corporation

Specifications of PAQ50S48-1R8

• Rohs Compliant: YES

（1）In case of adjusting output voltage lower
・All specifications are subject to change without notice.
PAQ
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.
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:
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.”
Output Voltage Adjustment by external resistor or
by variable resistor
（1-1）Available maximum output current = rated output
（1-2） Connect an external resistor Radj (down) between
Fig.1-5 Protection for Reversed Input Connection
Fig.2-2 Connection for output voltage trim down
120
110
100
90
current
the TRM terminal and -S terminal.
-S48
Series
PAQ
Fuse
Fig.2-1 Limit of Input Voltage
＋V
＋S
TRM
−S
−V
35
–15% to ＋15% of nominal output voltage
36
Input Voltage (VDC)
＋Vin
−Vin
40
1.2V, 1.8V, 2.5V Models
3.3V, 5V Model
Radj (down)
45
＋V
−V
50
＋
Load
−
55
Load
（2） In case of adjusting output voltage higher
1.8V, 2.5V, 3.3V, 5V model
Below graph is relation Δ(%) and value of external resistor.
（1-3）Equation of external resistor and output voltage
（2-1） Allowable maximum output current = value of
（2-2） Connect an external resistor Radj (up) between
（2-3） Equation of external resistor and output voltage
Radj (down): Value of external resistor
Δ(%):
Vo :
Radj (up) : external adjustment resistor
Δ(%) :
1.2V model
1.8V, 2.5V, 3.3V, 5V model
Radj （up）=
Radj （ up） =
Fig.2-4 Connection for output voltage trim up
Series
PAQ
Radj (down)=
Radj (down)=
output power÷output voltage (Reduce maximum
output current in specification.)
TRM terminal and +S terminal
1.2V model
1000
100
10
＋V
＋S
TRM
−S
−V
〔
〔
1
Fig.2-3 Δ(%) vs. Radj (down)
0
8.665×Vo（100 （ %）＋Δ （%） ）
5.11×Vo（100 （ %）＋Δ （%） ）
nominal output value of module
Output voltage change rate against
nominal output voltage
Output voltage change rate against
nominal output voltage
Change in Output Voltage（%)
〔
〔
1.225×Δ（%）
1.225×Δ（%）
10
5.777×100 （%）
5.11×100 （%）
Δ （%）
Δ （%）
Radj (up)
20
Except1.2V
−
−
5.777×100 （ %）
5.11×100 （ %）
1.2V
−10.22
Δ （%）
Δ （%）
−10.887
30
＋
Load
−
−10.887
−10.22
〕
［kΩ］
〕
［kΩ］
〕
〕
[kΩ]
[kΩ]
B-239
PAQ