PAH50S48-24 TDK Corporation, PAH50S48-24 Datasheet - Page 77

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

Specifications of PAH50S48-24

• Rohs Compliant: YES

（3） To adjust output voltage for whole range
・All specifications are subject to change without notice.
PAH
R1: ±5% Tolerance
VR: ±20% Tolerance
Below graph is relation Δ(%) and value of external resis-
tor.
Table 2-4 Value of External Resistor and Variable
Table 2-3 Value of External Resistor and Variable Resistor
Resistor values, as well as, connecting methods for
external resistor (R1) and external variable resistor (VR)
are described below.
Fig.2-6 Example connection of external resistor
200H
TRM
+S
+V
with end resistance below 1%
-V
-S
1000
1000
1000
1000
100
Fig.2-6 Δ(%) vs.Radj (down) (3)
100
100
100
VR
R1
VR
10
R1
10
10
10
1
Vo -20% , +10% (1.8V,2.5V)
Vo ±15%
1
1
1
0
0
Fig.2-5 Δ% vs.Radj (up) (2)
0
0
Resistor (±10% Variable)
Change in Output Voltage Δ （%)
Change in Output Voltage Δ （%)
Change in Output Voltage Δ （%)
Change in Output Voltage Δ （%)
VR
1.8V
1.8V
2.2k
5.6k
500
R1
1k
+
10
10
10
10
2.5V
2.5V
3.3k
1k
1k
2k
(3.3V)
3.3V
2.5V
1.8V
3.3V
2.5V
1.8V
1.5V
1.2V
1.5V
1.2V
3.3V
3.3V
2.2k
5.6k
1k
2k
Load
＋
−
20
20
20
20
unit: [Ω]
unit: [Ω]
（1） Measurement based on JEITA RC-9141
（2） Measurement using coaxial cable
3 Maximum Ripple and Noise
Take note that output ripple voltage and output spike noise
may vary depending on PCB wiring design. Generally out-
put ripple voltage and output spike noise can be reduced
by increasing value of external capacitor.
4 Maximum Line Regulation
Maximum line regulation is the maximum value of output
voltage change when input voltage is gradually varied
within specified input voltage range. The measurement
point for the input and output voltage are ±Vin and ±S
(sense point) respectively.
5 Maximum Load Regulation
Maximum value of output voltage change when output
current is gradually varied within specified output current
range. The measurement point for the input and output
voltage are ±Vin and ±S (sense point) respectively. When
using at dynamic load mode, audible noise may be heard
from the power module and output voltage fluctuation
might increase.
6 Over Current Protection (OCP)
This power module has built-in OCP function.
Output will recover when short circuit or overload condi-
tions are released. OCP setting value is fixed and there-
fore, can not be externally adjusted. Also, take note, when
Fig.3-1 Measurement of Maximum Output Ripple & Noise
Fig.3-2 Measurement of Maximum Output Ripple & Noise
Measure according to Fig.3-2. Connect capacitors (C1:
ceramic capacitor 1μF, C2: tantalum capacitor 10μF)
at 50mm distance from the output terminals. Measure
at ceramic capacitor (C1) leads using coaxial cable.
Use oscilloscope with 20MHz frequency bandwidth or
equivalent.
Measure according to the specified methods (Fig.3-1)
based on JEITA RC-9141(Clause 7.12 and 7.13)
which is described in the following. Connect ca-
pacitors (C1: ceramic capacitor 1μF, C2: tantalum
capacitor 10μF) at 50mm distance from the output
terminals. Measure at ceramic capacitor (C1) leads
as shown in fig.3-1 using coaxial cable with JEITA at-
tachment. Use oscilloscope with 100MHz frequency
bandwidth or equivalent.
＋V
−V
Based on JEITA RC-9141
Using coaxial cable
50mm
C1
＋V
−V
50mm
+
C1
C2
1.5m 50Ω
Coaxial cable
+
C2
1.5m 50Ω
Coaxial cable
As short as possible
Load
As short as possible
C
C
R
Load
100MHz
Bandwidth
Oscilloscope
JEITA Attachment
R:50Ω
C:4700pF
20MHz
Bandwidh
Oscilloscope
B-219
PAH