TDK-Lambda PAQ100S48-1R2, Инструкция по эксплуатации

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PAQ
-S48
PAQ
B-240
・All specifications are subject to change without notice.
Below graph is relation Δ(%) and value of external resistor.
10
100
1000
10000
0 5 10 15
Change in Output Voltage
(%)
Radj (up) (k
Ω
)
1.2V
1.8V
2.5V
3.3V
5V
Fig.2-5 Δ(%) vs. Radj (up)
（3）To adjust output voltage for whole range
Resister values, as well as, connecting methods for
external resistor (R1) and external variable resistor (VR)
are described below.
Model 1.2V 1.8V 2.5V 3.3V 5V
R1 3.3k 2.2k 4.7k 10k 3.3k
VR 2k 2k 2k 2k 5k
Unit：［Ω］
Table 2-3
Values of External Resistor and Variable Resistor
〔
Vo -20% , +10% (1.2V, 1.8V, 2.5V)
〕
Vo ±15% (3.3V, 5V)
Model 1.2V 1.8V 2.5V 3.3V 5V
R1 36k 33k 18k 27k 18k
VR 500 500 1k 1k 2k
Unit：［Ω］
Table 2-4
Values of External Resistor and Variable Resistor
(±10% Variable)
R1：±5% Tolerance
VR：±20% Tolerance
with end resistance below 1%
+S
+V
-S
TRM
-V
Load
＋
−
VR
R1
+
Fig.2-6 Example connection of external resistor
3 Maximum Ripple and Noise
（1） Measurement based on JEITA RC-9141
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.
−V
＋V
+
50mm
Load
As short as possible
Coaxial cable
100MHz
Bandwidh
JEITA
Attachment
R:50
Ω
C:4700pF
C2 C1
R
C
Oscilloscope
1.5m 50
Ω
Fig.3-1 Measurement of Maximum Output Ripple &
Noise Based on JEITA RC-9141
（2） Measurement using coaxial cable
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
+
50mm
Load
As short as possible
Coaxial Cable
20MHz
bandwidth
C2 C1
Oscilloscope
1.5m 50 Ω
Fig.3-2 Measurement of Maximum Output Ripple &
Noise 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