PAF600F280-28 TDK Corporation, PAF600F280-28 Datasheet - Page 35

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

・All specifications are subject to change without notice.
PAF
1 Input Voltage Range
Input voltage range for PAF400F280 Series is indicated
below.
Basically, ripple voltage (Vrpl) which results from rectifica-
tion 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 be-
comes large.
Note that abrupt input voltage change could cause the out-
put voltage to fluctuate during transition.
Also, input voltage waveform peak value must not exceed
above input voltage range.
●Basic Connection
Input Fuse
PAF400F280 Series module is not internally fused. To
ensure safe operation and to receive each Safety Standard
approval, please connect an external fuse (fast-blow type)
as shown in Fig.1-2.
C1 :
Input capacitor C1 is recommended to stabilize the mod-
ule when the module is powered from a high impedance
source.
Select electrolytic capacitor with low ESR and sufficient
allowable ripple current.
Recommended input fuse current rating : 5A or 6.3A
Fuse
C2
C3
400F280
Allowable input ripple voltage : 20Vp-p
Input Voltage Range : 200 - 400VDC
＋
C1
Fig.1-2 Basic Connection
Base
plate
＋Vin
−Vin
SG
CNT
Fig.1-1 Ripple Voltage
2. Explanations on Specifications
OVPALM
time
OVTRM
IMON
TRIM
OVP
AUX
IOG
＋S
＋V
−V
−S
PC
C4
C5
Vrpl
Below 20V
50mm and below
C6
C13
＋
C7
Input Voltage
Range
‥‥
t
＋
C11
Load
＋
−
Verify actual ripple current value by actual measurement.
Note
C2, C3 : 330pF
To reduce spike noise voltage at the output, connect the
high withstand voltage ceramic capacitor from + Vin termi-
nal, –Vin terminal to the baseplate.
Withstand Voltage of C2, C3 : 3KVAC and above
Connect the C2 between +Vin terminal and baseplate, and
the C3 between –Vin terminal and baseplate with the short
connections as possible.
C4, C5 : 0.022μF
To reduce spike noise voltage at the output, connect a film
capacitor.
Connect the C4 between +Vin terminal and baseplate, and
the C5 between –Vin terminal and baseplate with the short
connections as possible.
C6 : 10μF
To reduce spike noise voltage at the output, connect a ce-
ramic 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.
Note）When ambient temperature become lower than 0℃, con-
C7 - C11 : 2700μF
For stable operation, connect an electrolytic capacitor be-
tween +V and –V at 50mm distance from the output termi-
nals.
Take note that output ripple and output fall characteristics
could be affected by the electrolytic capacitor, equivalent
impedance and inductance characteristics of wiring.
Take note that output ripple voltage could vary according
to PCB wiring design.
For cases of abrupt changes in load current or input volt-
age, increasing capacitance value of the external capaci-
tors could reduce the voltage fluctuation.
Note） １. Use low impedance electrolytic capacitor with excel-
Withstand voltage of C4, C5 : 500VDC and above
Recommended capacitor value : 22µF and above
）
(TEMPERATURE CHARACTERISTICS CODE B)
２ . Take note of the allowable ripple current of the ca-
nect ceramic capacitor with excellent temperature Char-
acteristics.
When input line inductance becomes excessively
high 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.
lent temperature characteristics.
(Nippon Chemi-con LXV Series or equivalent)
＊
5（Parallel connection）
B-127
PAF