PAH50S48-24 TDK Corporation, PAH50S48-24 Datasheet - Page 50

• Manufacturer Part Number: PAH50S48-24
• Description: POWER SUPPLIES
• Manufacturer: TDK Corporation

Specifications of PAH50S48-24

• Rohs Compliant: YES

PAH
B-192
PAH
●Output Voltage Adjustment by external resistor or
（1） In case of adjusting output voltage lower
（2） In case of adjusting output voltage higher
by variable resistor
（1-1） Available maximum output current = rated out-
（1-2） Connect an external resistor Radj (down) be-
（2-1） Allowable maximum output current = maximum
（2-2） Connect an external resistor Radj (up) between
（1-3）Equation of external resistor and output
Fig.2-2 Connection for output voltage trim down
●PAH300S48
300S48, 350S48
Radj(down) :
Δ（%） :
POWER
MODULE
Below graph is relation Δ(%) and value of
external resistor.
Radj （down） ＝
120
118
110
100
put current
tween the TRM terminal and –S terminal.
output power ÷ output voltage (reduce maxi-
mum output current in specification.)
TRM terminal and +S terminal.
90
60
90
60
Fig.2-3 Δ(%) vs. Radj (down) (1)
voltage
0
0
Fig.2-1 Limit of Input Voltage
1000
TRM
100
＋V
−V
0.1
＋S
−S
10
Radj （up） ＝
1
0
Change in Output VoltageΔ (%)
18
36
Value of external resistor
Output voltage change rate against
nominal output voltage
Input Voltage (VDC)
Input Voltage (VDC)
36.8
10
100%
18.5
37
Δ%
Vo （ 100%＋Δ%）
Radj (down)
1.225×Δ%
12V Model
20
−2〔kΩ〕
19
38
28V Model
30
19.5
39
−
40
＋
Load
−
100%＋2×Δ%
36
76
Δ%
〔kΩ〕
3 Maximum Ripple and Noise
Measured value according to the specified methods based
on JEITA-9141 (Clause 7.12 and clause 7.13) which is de-
scribed in the following.
Connect according to fig.3 -1 and measure. Connect
capacitors (C2, C3: film capacitor or ceramic capacitor
0.022μF) between output terminals and the nearest M3
threaded hole. Connect capacitors (C4: refer to table 1-1
for electrolytic capacitor values, C5: ceramic capacitor
0.1μF) at 50mm distance from the output terminals. Mea-
sure at ceramic capacitor(C5) terminals as shown in fig.
3-1 using coaxial cable with JEITA attachment. Use oscil-
loscope with 100MHz frequency bandwidth or equivalent.
Take note that output ripple voltage and output spike noise
may vary depending on PCB wiring design.
Generally, increasing capacitance value of external ca-
pacitor can reduce output ripple voltage and output spike
noise.
（2-3）Equation of external resistor and output voltage
Fig.3-1 Measurement of Maximum Output Ripple & Noise
Radj （down） ＝
Fig.2-4 Connection for output voltage trim up
POWER
MODULE
Below graph is relationΔ(%) and value of external
resistor.
Radj （up） ＝
Vo: nominal output value of module
Radj (up): external adjustment resistor
Δ（%） : Output voltage change rate against
＋V
＋S
−S
−V
10000
1000
TRM
＋V
−V
＋S
−S
100
10
Fig.2-5 Δ% vs. Radj (up) (2)
50mm
C4
0
C3
C2
nominal output voltage
100%
Δ%
+
・All specifications are subject to change without notice.
Vo （ 100%＋Δ%）
Change in Output VoltageΔ (%)
C5
1.225×Δ%
As short as possible
−2〔kΩ〕
1.5m 50Ω
Coaxial Cable
Radj (up)
10
Load
−
12V
28V
100%＋2×Δ%
R
C
Oscilloscope
R:50Ω
C:4700pF
JEITA Attachment
Δ%
20
＋
−
Load
〔kΩ〕