PAF600F280-28 TDK Corporation, PAF600F280-28 Datasheet - Page 46

• Manufacturer Part Number: PAF600F280-28
• Description: 28V@21.5A
• Manufacturer: TDK Corporation

PAF
B-138
PAF
Note ) 1. Use low impedance electrolytic capacitor with excel-
C8:
When switches or connectors are used between input
source and PAF450F280/PAF600F280 Series input
terminals, impulse surge voltage is generated at input 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 C8 as shown in fig.1-3
and fig. 1-4.
Recommended Capacitance Value: 10 - 47μF and above
Also, in-rush current flows at line throw-in. Therefore, be
sure to verify capability of switch or fuse to withstand I
line throw-in.
Reverse input connections
Reverse input polarity would cause module damage. For
cases where reverse connections are possible, connect a
protective diode and fuse. Use protective diode with higher
voltage rating than the input voltage, and with higher surge
current rating than the fuse.
Fig.1-5 Protection for Reversed Connection of Input
Table1-2 C7: Recommended Values of External
2. Use capacitors indicated in table 1-1 in parallel when
3. Take note of the allowable ripple current of the capac-
Vout
12V
24V
28V
48V
lent temperature characteristics.
(Nippon Chemicon LXY Series or equivalent)
ambient temperature becomes lower than –20℃
because output ripple voltage could be affected by
ESR.Quantities for capacitors are as follows.
itor to be used. Especially, when load adding capaci-
tors for abrupt current changes, be sure to verify that
ripple current does not exceed allowable ripple current
before use.
450F280, 600F280
Fuse
Fig.1-4 Input Filter when Plural Power
Fig.1-3 Input Filter with Input Switch
Switch
Switch
Output Capacitor (Ta<-20℃ )
50V 1,000μF
＋
C8
C8
＋
＋Vin
−Vin
25V 1,000μF
50V 820μF
50V 820μF
(Voltage Rating 400V and above)
Fuse
Fuse
Fuse
X
＋
＋
C1
C1
C7
C1
2 series, x 2 parallel
＋
X
X
＋V
−V
X
＋Vin
＋Vin
2 parallel
2 parallel
−Vin
−Vin
＋Vin
−Vin
4 parallel
Load
2
t at
● Recommended input filer as EMI countermeasure
C2, C3, C11, C12: 680pF (Ceramic Capacitor)
C9,C10,C13:
L1:
Note) 1. For the power module output, connect output capaci-
2 Output Voltage Adjustment Range
Output voltage could be adjusted within the range de-
scribed below by external resistor or variable resistor, or
by applying external voltage. However, take note that OVP
might trigger when output voltage adjustment exceeds the
ranges indicated below.
Furthermore, when increasing the output voltage, reduce the
output current so as not to exceed the maximum output power.
Also, take note that when output voltage is increased, in-
put voltage range is limited as shown in fig. 2-1.
With the external circuit as shown in fig.2-2, remote sens-
ing is possible even when output voltage is varied. For
details on remote sensing function, please refer to ”9.
Remote Sensing”
Output Voltage Adjustment by external resistor or
by variable resistor
Resistor values, as well as, connecting methods for ex-
ternal resistor (R1) and external variable resistor (VR) are
described below.
In this case, using VR as remote programming resistor, re-
mote programming of output voltage can be possible.
Also, be sure to connect remote programming resistor be-
tween +S terminal and +V terminal.
Recommended Values:
C1:
L2:
Fig.1-6 Recommended input filer as EMI countermeasure
(conforms to VCCI Class A, FCC class A)
2. VCCI Class A, FCC Class A limits can be satisfied
Output Voltage Adjustment Range:
Fuse
tors described in the basic circuit connection.
with the above recommended filter at Densei-Lambda
measuring conditions. However, there are cases where
above limits might not be satisfied due to input and
output wiring method, as well as, peripheral circuits.
When selecting input filter, be sure to verify actual EMI
characteristics (CE and RE) before finalizing the filter.
Refer to
tion data for details.
−40% to ＋20% of Nominal Output Voltage
120
110
100
90
C9
0
Fig.2-1 Limit of Input Voltage
PAF450F280-＊/
L1
22 μ F (Electrolytic Capacitor)
0.68μF (Film Capacitor)
5 mH (Common mode choke coil)
3.8 mH (Common mode choke coil)
C10
200
・All specifications are subject to change without notice.
C11
C12
Input Voltage （VDC）
240
L2
C13
280
PAF600F280-＊ evalua-
C2
C3
320
C1
＋
Baseplate
＋Vin
−Vin
360