PAQ50S48-1R8 TDK Corporation, PAQ50S48-1R8 Datasheet - Page 16

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

Specifications of PAQ50S48-1R8

• Rohs Compliant: YES

PAQ
B-240
（3）To adjust output voltage for whole range
（1） Measurement based on JEITA RC-9141
PAQ
Below graph is relation Δ(%) and value of external resistor.
3 Maximum Ripple and Noise
Model
Model
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: electrolytic
capacitor 10μF) at 50mm distance from the output
terminals. Measure at ceramic capacitor (C2) leads
as shown in fig.3-1 using coaxial cable with JEITA at-
tachment. Use oscilloscope with 100MHz frequency
bandwidth or equivalent.
Resister values, as well as, connecting methods for
external resistor (R1) and external variable resistor (VR)
are described below.
Values of External Resistor and Variable Resistor
Values of External Resistor and Variable Resistor
R1
VR
R1
VR
Fig.2-6 Example connection of external resistor
TRM
〔
-S48
+S
+V
-V
-S
Vo -20% , +10%
Vo ±15%
10000
1.2V
1.2V
3.3k
36k
500
1000
2k
R1 ：±5% Tolerance
VR ：±20% Tolerance
100
10
Fig.2-5 Δ(%) vs. Radj (up)
0
VR
with end resistance below 1%
(±10% Variable)
R1
+
Change in Output Voltage (%)
1.8V
1.8V
2.2k
500
33k
2k
Table 2-4
Table 2-3
5
(1.2V, 1.8V, 2.5V)
(3.3V, 5V)
2.5V
2.5V
4.7k
18k
2k
1k
10
1.2V
1.8V
2.5V
3.3V
5V
3.3V
3.3V
Load
10k
27k
15
2k
1k
＋
−
Unit ： ［Ω］
〕
Unit ： ［Ω］
3.3k
18k
5V
5V
5k
2k
（2） Measurement using coaxial cable
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 with-
in 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) respectly. 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
output voltage drops down below lower side of adjustment
range for 20ms-50ms by output short circuit or over load
conditions, output might be shut down.
Output can be recovered by manual reset of the control
Fig.3-1 Measurement of Maximum Output Ripple &
Fig.3-2 Measurement of Maximum Output Ripple &
Measure according to fig.3-2. Connect capacitors
(C1:ceramic capacitor 1μF, C2: electrolytic capacitor
10μF) at 50mm distance from the output terminals.
Measure at ceramic capacitor (C2) leads using coaxial
cable. Use oscilloscope with 20MHz frequency band-
width or equivalent.
＋V
−V
＋V
−V
50mm
Noise Based on JEITA RC-9141
Noise Using coaxial cable
C1
50mm
C1
+
C2
・All specifications are subject to change without notice.
+
1.5m 50Ω
Coaxial Cable
C2
1.5m 50Ω
Coaxial cable
As short as possible
As short as possible
Load
Load
C
R
Oscilloscope
Oscilloscope
bandwidth
Bandwidh
20MHz
100MHz
JEITA
Attachment
R:50Ω
C:4700pF