PAF600F280-28 TDK Corporation, PAF600F280-28 Datasheet - Page 36

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

PAF
B-128
PAF
C12：
When switches or connectors are used between input
source and PAF400F280 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 C12 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
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.
2 Output Voltage Adjustment Range
Output voltage could be adjusted within the range de-
scribed below by external resistor , variable resistor, or by
applying external voltage. However when OVP trip point is
adjusted by over voltage protection operating voltage trim-
ming terminal or remote over voltage protection monitor
terminal, as description in “8. Over Voltage Protection”,
adjust output voltage under OVP trip point.
Recommended Capacitance Value : 10 - 47 μ F and above
Fig.1-5 Protection for Reversed Input Connection
pacitor to be used. Especially, for abrupt load current
changes, be sure to verify that ripple current does not
exceed allowable ripple current before use.
400F280
Fuse
Fig.1-4 Input Filter when Plural Power
Fig.1-3 Input Filter with Input Switch
(Voltage Rating 400V and above)
Switch
Switch
＋
C12
C12
＋Vin
−Vin
＋
Fuse
Fuse
Fuse
＋
C1
＋
C1
C1
＋
＋V
−V
＋Vin
＋Vin
−Vin
−Vin
＋Vin
−Vin
Load
2
t at
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
shown in Table 2-1 and Fig 2-4 respectively.
Remote programming of output voltage can be achieved by
using VR.
External Resistor : below +/– 5% Tolerance
Variable Resistor : below +/–20% Tolerance
Table 2-1Values of External Resistor and Variable Resistor
When increasing the output voltage , reduce the output
current accordingly so as not to exceed the maximum out-
put power.
Also, take note that when output voltage is increased, in-
put voltage range is limited as shown in Fig.2-1. - Fig. 2-3.
Remote sensing is possible even when output voltage is
varied. For details on remote sensing function, please refer
to” 10. Remote Sensing”
Fig.2-1 Limit of Input Voltage Range for Vo=1.8V
Fig.2-2 Limit of Input Voltage Range for Vo=3.3V
R1
VR
Fig.2-3 Limit of Input Voltage Range for Vo=5V
4.2
3.3
4.2
3.3
2.6
1.8
2.6
1.8
6
4
6
2
4
2
6
5
4
6
5
2
4
0
2
0
3
2
3
1
2
0
1
0
0
0
4.2
3.3
2.6
1.8
6
4
2
6
5
4
2
0
3
2
1
0
0
Output Voltage Adjustment Range
200
200
200
200
200
200
200
200
200
1.8V
5.6k
5k
1.8V : 1.0V - 2.6V
3.3V : 2.2V - 4.2V
・All specifications are subject to change without notice.
5V : 2.9V - 6.0V
with end resistance below 1%
210
210
210
210
210
210
210
210
210
Input Voltage(VDC)
Input Voltage(VDC)
Input Voltage(VDC)
Input Voltage(VDC)
Input Voltage(VDC)
Input Voltage(VDC)
Input Voltage(VDC)
Input Voltage(VDC)
Input Voltage(VDC)
220
220
220
220
220
220
220
220
220
3.3V
8.2k
10k
230
230
230
230
230
230
230
230
230
240
240
240
240
240
240
240
240
240
6.8k
20k
5V
Unit：[Ω]