PAQ50S48-1R8 TDK Corporation, PAQ50S48-1R8 Datasheet - Page 14

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

Specifications of PAQ50S48-1R8

• Rohs Compliant: YES

PAQ
B-238
PAQ
1 Input Voltage Range
Input Voltage Range for PAQ-S48 Series is indicated
below.
Basically, ripple voltage (Vrpl) which results from
rectification and filtering of commercial AC line is included
within the input voltage as shown in Fig.1-1. Ripple voltage
must be limited within the voltage described below.
When this value is exceeded, the output ripple voltage
becomes large.
Note that sudden input voltage change may cause variation
of output voltage transitionally.
Also, input voltage waveform peak value must not exceed
above input voltage range.
Input Fuse
PAQ-S48 Series module is not internally fused. To ensure
safe operation and to receive each Safety Standards
approval, please connect an external fuse (fast-blow type)
as shown in Fig.1-2.
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: 1μF, C2: 10μF
To reduce spike noise voltage at the output, connect
1μF ceramic capacitor and 10μF electrolytic capacitor
or tantalum capacitor between +V and –V within 50mm
distance from the output terminals.
Also, take note that output spike noise voltage could vary
according to PCB wiring design.
-S48
Recommended input fuse current rating:
Fuse
Allowable input ripple voltage: 4Vp-p
Input Voltage Range: 36-76VDC
Fig.1-1 Input Ripple Voltage
Fig.1-2 Basic Connection
+
C3
PAQ100S48: 6.3A
PAQ50S48: 5A
+Vin
-Vin
CNT
Time
2. Explanation on Specifications
TRM
+S
+V
-V
-S
Vrpl
below 4V
50mm
C1
+
Input Voltage
Range
C2
Load
＋
−
Maximum capacitance that can be connected between +V
and –V, is total 10,000μF.
C3:
Input capacitor C3 is recommended to stabilize the module
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.
Note)
C4：
When switches or connectors are used between input
source and PAQ-S48 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 electrolytic
capacitor C4 as shown in fig.1-3 and fig.1-4.
Also, in-rush current flows at line throw-in.
Therefore, be sure to verify capability of switch or fuse to
withstand I
1. Use low impedance electrolytic capacitor
2. When input line inductance becomes excessively
3. When ambient temperature becomes lower than
Fig.1-4 Input Filter with Switch when Plural Power
Recommended capacitor value: 33μF and above
with excellent temperature characteristics.
(Nippon Chemicon LXV Series or equivalent)
high due to insertion of choke coil operation of
the power module could become unstable. For
this case, increase C3 value more than the value
indicated above.
–20℃, connect two capacitors indicate above in
parallel.
Recommended Capacitor: 33μF and above
2
t at line throw-in.
Fig.1-3 Input filter (C4) with Switch
（Voltage Rating 100V or above）
（voltage rating 100V or above）
Switch
Switch
・All specifications are subject to change without notice.
C4
+
C4
+
Fuse
Fuse
Fuse
C3
+
C3
+
C3
+
＋Vin
＋Vin
＋Vin
−Vin
−Vin
−Vin