PAH150S48-2.5 TDK Corporation, PAH150S48-2.5 Datasheet - Page 76

• Manufacturer Part Number: PAH150S48-2.5
• Manufacturer: TDK Corporation

PAH
B-218
（1） In case of adjusting output voltage lower
PAH
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.
However, take note that OVP might trigger when output
voltage adjustment exceeds the ranges indicated below.
When increasing the output voltage reduce the output cur-
rent accordingly so as not to exceed the maximum output
power.
For 3.3V output model, take note that when output volt-
age is increased, input voltage range is limited as shown
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
Output Voltage Adjustment Range
3.3V:
1.8V, 2.5V : -20% - +10% of nominal output Voltage
Fig.2-2 Connection for output voltage trim down (1)
Fig.1-5 Protection for Reversed Input Connection
PAH200H
120
110
100
200H
Series
90
current
the TRM terminal and –S terminal.
Fig.2-1 Limit of Input Voltage
Fuse
＋V
＋S
TRM
−S
−V
-15% - +15% of nominal output Voltage
35
36V
Input Voltage (VDC)
40
1.2V, 1.5V, 1.8V, 2.5V Model
＋Vin
−Vin
3.3V Model
Radj (down)
45
＋V
−V
50
Load
＋
−
Load
55
（2） In case of adjusting output voltage higher
Radj (down) : Value of external resistor
Δ(% ):
Below graph is relation Δ% and value of external resistor.
Ex.） To adjust to 3.63V for 3.3V nominal model, setting
（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
（1-3） Equation of external resistor and output voltage.
Vo:
Radj (up) : external adjustment resistor
Δ (% ):
level is +10% , therefore Δ(% ) = 10% .
(1R8, 2R5, 3R3)
(1R5)
(1R2)
(1R8, 2R5, 3R3)
(1R5)
(1R2)
(1R8, 2R5, 3R3)
(1R5)
(1R2)
(1R8, 2R5, 3R3)
(1R5)
(1R2)
Radj (down)=
Radj(down)=
Radj(down)=
1000
PAH200H
TRM terminal and +S terminal
Radj (down)=
Radj(down)=
Radj(down)=
Fig.2-4 Connection for output voltage trim up (2)
100
output power ÷ output voltage (reduce maxi-
mum output current in specification.)
Series
10
1
Fig.2-3 Δ(% ) vs. Radj(down) (1)
0
Change in Output Voltage Δ (％)
Output voltage change rate against nominal
output voltage
＋V
＋S
−S
−V
TRM
nominal output value of module
Output voltage change rate against nominal
output voltage
1.26×100%
0.78×100%
・All specifications are subject to change without notice.
1.26×100%
0.78×100%
2.67×100%
1.67×100%
100%
2.67×100%
1.67×100%
100%
2
＋
−
2
＋
−
10
Radj (up)
0.2
0.22
0.2
0.22
3.67
2.67
3.67
2.67
＋
＋
＋
Load
−
20