PAQ
65D
PAQ
B-251
・All specifications are subject to change without notice.
1 Basic Connection
-Vin
+Vin
CNT
TRM1
Vo1
Vo2
GND
TRM2
C1
FUSE
C3
C2
−
＋
−
＋
+
LOAD
LOAD
50mm
Fig.1-1: Basic Connection
Input Fuse
PAQ65D48 Series module is not internally fused. To en-
sure safe operation and to receive each Safety Standards
approval, please connect an external fuse (fast-blow type)
as shown in Fig.1-1.
Recommended input fuse current rat-
ing is 5A.
Fuse must be connected to the +Vin side if –Vin side is
used as ground, or fuse must be connected to –Vin side if
+Vin side is used as a ground.
C1：33μF
Input capacitor C1 is recommended to stabilized the mod-
ule when the module is powered from a high impedance
source. Select the electrolytic capacitor with low ESR
and sufficient allowable ripple current. Verify actual ripple
current value by actual measurement.
The recommended
capacitor value is 33μF and above (voltage rating 100V or
above).
Note:
1. Use low impedance electrolytic capacitor with excellent tem-
perature characteristics. (Nippon Chemicon LXV Series or
equivalent)
2. When the input line inductance becomes excessively high
due to insertion of choke coil operation of the power module
could become unstable. For this case, increase C1 value
more than the value indicated above.
3. When the ambient temperature becomes lower than –20℃ ,
it is recommended to use 33μF ceramic capacitor.
C2 and C3: 22μF
To reduce spike noise voltage at the output, connect a
22μF ceramic capacitor across the +Vo and GND of each
output. The position of the capacitor should be within
50mm distance from the output terminals. Also, take note
that output spike noise voltage could vary according to
PCB wiring design.
Note:
1. Total maximum capacitance that can be connected between
+Vo and GND is 4,700μF for each output.
2. If using electrolytic capacitor, use a low impedance type (such
as Nippon Chemicon LXV series or equivalent) with excel-
lent temperature characteristics or parallel a few electrolytic
capacitors; especially at negative temperature operation.
C4:
When switches or connectors are used between input
source and PAQ65D48 Series input terminals, impulse
surge voltage is generated due to input throw-in by switch
on/off or due to inserting/removing of power module from
the active line. For this case, connect an additional elec-
trolytic capacitor C4 of 33μF as shown in Fig.1-2 and
Fig.1-3.
Also, there will be in-rush current flows at input throw-in
condition. Therefore, be sure to verify the capability of
switch or fuse to withstand I
2
t at line throw-in.
Fuse
-Vin
+Vin
C1
+
C4
+
Switch
Fig.1-2: Input filter (C4) with Switch
Fuse
-Vin
+Vin
C1
+
C4
+
Switch
Fuse
C1
+
-Vin
+Vin
Fig.1-3: Input Filter with Switch when Multiple Power
Modules are used.
Reverse input connections
A reverse input voltage polarity applied will cause the mod-
ule to damage. For cases where reverse connections are
possible, connect a protective diode and fuse as shown
in Fig.1-4. Use protective diode with higher voltage rating
than the input voltage, and with higher surge current rating
than the fuse.
-Vin
+Vin
-V
+V
Load
Fuse
Fig.1-4: Protection for Reversed Input Connection
2 Input Voltage Range
The operating
Input Voltage Range
for PAQ65D48 Series
is
36 - 76VDC.
Ripple voltage (Vrpl) which results from rectification and
filtering of commercial AC line is included within the input
voltage as shown in Fig.2-1. For example, input voltage
waveform peak value must not exceed above input voltage
range.
In addition, the allowable input ripple voltage must be limit-
ed within 4 Volt peak–peak. When this value is exceeded,
the output ripple voltage will become large.
Note that sudden input voltage change may cause varia-
tion of output voltage transitionally.
2. Explanation on Specifications
Содержание PAQ100S48-1R2
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