TDK-Lambda PH Series, Руководство пользователя, Страница: 48 / 58

PH
300S, 600S
PH
B-346
・All specifications are subject to change without notice.
Reversed Connection of Input
An error of reverse (＋,−electrodes) input may cause of
damage of the power module. If there is possibility to con-
nect the module conversely by accident, it is necessary to
attach a protective diode and an input fuse.
The rating voltage of the diode shall be higher than input
voltage, and the maximum in-rush current shall be higher
than fuse.
＋Vin
−Vin
＋V
−V
Fuse
Load
Figure1-5 Protection for Reversed Connection of Input
2 Output Voltage Range
Output voltage can be adjusted within±10% (3.3V, 5V,
48V : -10% to +20% ) of the nominal voltage by adjusting
the external trimmer (variable resistor). However, if the out-
put voltage become over the above range, OVP activates.
There is a limit of input voltage shown in Figure2-1 when
the output voltage trims high.
(48VDC Input)
120
110
100
90
35 40 45 50 55
Input Voltage（VDC）
120
110
100
90
200 220 240 260 280
Input Voltage（VDC）
O
u
tp
u
t
V
o
lt
a
g
e（
%
）
O
u
tp
u
t
V
o
lt
a
g
e（
%
）
3.3V, 5V, 48V Output 3.3V, 5V, 48V Output
12V, 15V, 24V, 48V Output 12V, 15V, 24V, 48V Output
3.3V, 5V, 48V Output 3.3V, 5V, 48V Output
12V, 15V, 24V, 48V Output 12V, 15V, 24V, 48V Output
36
(280VDC Input)
120
110
100
90
35 40 45 50 55
Input Voltage（VDC）
120
110
100
90
200 220 240 260 280
Input Voltage（VDC）
O
u
tp
u
t
V
o
lt
a
g
e（
%
）
O
u
tp
u
t
V
o
lt
a
g
e（
%
）
3.3V, 5V, 48V Output 3.3V, 5V, 48V Output
12V, 15V, 24V, 48V Output 12V, 15V, 24V, 48V Output
3.3V, 5V, 48V Output 3.3V, 5V, 48V Output
12V, 15V, 24V, 48V Output 12V, 15V, 24V, 48V Output
36
Figure2-1 Limit of Input Voltage
Connection method of external resistor (R1) and variable
resistor (VR) is shown as follow.
3.3V 5V 12V 15V 24V 28V 48V
− 10% ± 10% − 10%
＋ 20% ＋ 20%
4.7k 4.7k 30k 33k 68k 68k 220k
2k 5k 5k 10k 10k 20k 30k
Variable
Range
R1
VR
External Resistor：below±5% Tolerance
Variable Resistor：below±20% Tolerance
below 1% of Remain
Table2-1 External Resistor and Variable Resistor Output
-10%～ +20% Variable (3.3V, 5V, 48V)
±10% Variable(12V, 15V, 24V, 28V)
＋V
＋S
−V
＋
VR
R1
−
−S
TRM
Load
Figure2-2 Example Connection of External Resistance
For 48V output model, avoid to reduce the output voltage
below -10% cause damage of the module
3 Maximum Output Ripple and Noise
Maximum output ripple and noise is measured by a method
based on JEITA-9141.
The connection is shown as Figure3-1. Attach capacitors
(C4: Ceramic Capacitor: 2.2μF, C5: Electrolytic Capaci-
tor: Refer to Table1-2) 50mm from the output for PH300S
and as short as possible to the output terminal for PH600.
Also, attach a coaxial cable with JEITA attachment at the
both side of C4 capacitor shown as Figure3-1. Oscillo-
scope shall be used at a range of 100MHz bandwidth.
The output ripple voltage and the output spike noise volt-
age may be changed for the design of printed circuit board.
＋V
−V
＋
50mm
Load
Oscilloscope
JEITA
Attachment
R：50Ω
C：4700pF
as short as possible
1.5m 50Ω
Coaxial Cable
Figure 3-1 Measurement of Maximum Output Ripple &
Noise (Example: PH300S)