PAQ50S48-1R8 TDK Corporation, PAQ50S48-1R8 Datasheet - Page 27

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

Specifications of PAQ50S48-1R8

• Rohs Compliant: YES

・All specifications are subject to change without notice.
PAQ
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 ： 33μ F
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 33μ F and above (voltage rating 100V or
above).
Note:
1. Use low impedance electrolytic capacitor with excellent tem-
2. When the input line inductance becomes excessively high
3. When the ambient temperature becomes lower than –20℃ ,
C2 and C3: 22μ F
To reduce spike noise voltage at the output, connect a
22 μ F 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
2. If using electrolytic capacitor, use a low impedance type (such
+Vo and GND is 4,700μF for each output.
as Nippon Chemicon LXV series or equivalent) with excel-
lent temperature characteristics or parallel a few electrolytic
capacitors; especially at negative temperature operation.
perature characteristics. (Nippon Chemicon LXV Series or
equivalent)
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.
it is recommended to use 33μ F ceramic capacitor.
FUSE
65D
C1
+
Fig.1-1: Basic Connection
CNT
-Vin
+Vin
TRM1
TRM2
GND
Vo1
Vo2
2. Explanation on Specifications
50mm
C2
C3
＋
−
−
＋
LOAD
LOAD
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
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.
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.
Fig.1-3: Input Filter with Switch when Multiple Power
Fig.1-4: Protection for Reversed Input Connection
Modules are used.
Fig.1-2: Input filter (C4) with Switch
Fuse
Switch
Switch
+Vin
-Vin
C4
+
+
C4
2
t at line throw-in.
Fuse
Fuse
Fuse
+
C1
+
C1
C1
+
+V
-V
+Vin
+Vin
-Vin
-Vin
+Vin
-Vin
Load
B-251
PAQ