PAF600F280-28 TDK Corporation, PAF600F280-28 Datasheet - Page 18

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

PAF
B-110
PAF
Note) 1. Use low impedance electrolytic capacitor with ex-
2. Use 4 more and above capacitors indicated above
3. Take note of the allowable ripple current of the
C4:
When switches or connectors are used between input
source and PAF500F24 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 as shown in Fig.1-3 and Fig.1-4.
Recommended Capacitance Value: 560μF and above
(Voltage Rating 50V 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 or 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
500F24
cellent temperature characteristics.
(Nippon Chemicon LXY Series or equivalent)
in parallel when ambient temperature becomes
lower than –20℃ to reduce ESR.
capacitor to be used. Especially, when load add-
ing capacitors for abrupt current changes, be sure
to verify that ripple current does not exceed allow-
able ripple current before use.
Fig.1-4 Input Filter when Plural Power
Fig.1-3 Input Filter with Input Switch
Fuse
Switch
Switch
C4
＋
＋
C4
＋Vin
−Vin
Fuse
Fuse
Fuse
＋
C1
＋
C1
C1
＋
＋V
−V
＋Vin
＋Vin
−Vin
−Vin
＋Vin
−Vin
Load
2
t at
●Recommended input filer as EMI counter-measure
(conforms to VCCI Class 1, FCC class A)
Note) 1. For the power module output, connect output capaci-
2. VCCI Class 1, FCC Class A limits can be satisfied
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 below, remote sensing is possible
even when output voltage is varied. For details on remote
sensing function, please refer to ” 9. Remote Sensing”
Recommended Values:
C1 ：
C5 ：
C6,C7 ： 0.1μF (Ceramic Capacitor)
L1 ：
110
100
90
80
Output Voltage Adjustment Range:
-40% to +10% of Nominal Output Voltage
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 PAF500F24-＊ Evaluation Data for details.
Fig.1-6 Recommended input filer as EMI
560μF (Electrolytic Capacitor) ×2 pcs in parallel
2.2μF (Ceramic Capacitor)
１mH (Common mode choke coil)
28V Model
Fig.2-1 Limit of Input Voltage
Fuse
countermeasure
18
C5
・All specifications are subject to change without notice.
19
Input Voltage (VDC)
12V Model
20
L1
C6
21
＋
C1
C7
＋Vin
−Vin
Baseplate
25