PAF600F280-28 TDK Corporation, PAF600F280-28 Datasheet - Page 26

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

PAF
B-118
PAF
1 Input Voltage Range
Input voltage range for PAF500, 600, 700F48 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 sudden input voltage change may cause varia-
tion of output voltage transitionally.
Also, input voltage waveform peak value must not exceed
above input voltage range.
●Basic Connection
Input Fuse
This power module has no built-in fuse. Use external fuse
to acquire various Safety Standards and to improve safety.
Also, use fast-blow type for every module.
Furthermore, 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.
Input Fuse recommended current rating : 30A
500F48, 600F48, 700F48
Allowable input ripple voltage: 4Vp-p
Fuse
Input Voltage Range: 36 ～ 76VDC
Fig.1-2 Basic Connection
Fig.1-1 Ripple Voltage
R1
(F30AH, 100/250V)
＋
C1
Baseplate
＋Vin
−Vin
＋ON/OFF
−ON/OFF
Time
2. Explanations on Specifications
IOG/OVP
TRIM
AUX
＋S
＋V
−V
−S
PC
Vrpl
below 4V
50mm
C2
D1
Input Voltage
Range
＋
C3
t
Load
＋
−
C1:
To prevent the effect of input line inductance to the power
module, connect electrolytic capacitor or ceramic capaci-
tor between +Vin and –Vin terminals.
Furthermore, use electrolytic capacitor with small ESR
value. Especially take note that during line turn off at low
ambient temperature, power module output will not nor-
mally shut down due to unstable C1 voltage.
Also, ripple current flows across this capacitor. Therefore,
verify maximum allowable ripple current this capacitor
when selecting component. Verify actual ripple current
value by actual measurement.
Recommended capacitor value
Note）1. Use low impedance electrolytic capacitor with excel-
2. When input line inductance becomes excessively high
C2: 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.
C3:
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 shutdown could be
affected by 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.
3. For PAF500, 600F48 series, when ambient tempera-
PAF500, 600F48: 100μF and above
PAF700F48: 220μF×2 and above
Table1-1 C3: Recommended Values of External
＊1 parallel connect
lent temperature characteristics.
(Nippon Chemicon LXV Series or equivalent)
due to insertion of choke coil, operation of the power
module could become unstable. For this case, in-
crease C1 value more than the value indicated above.
ture becomes lower than –20℃ , connect two capaci-
tors indicated above in parallel to reduce ESR.
Vout
3.3V
12V
28V
5V
(voltage rating 100V and above)
・All specifications are subject to change without notice.
Output Capacitor
(voltage rating 100V and above)
10V 5600μF × 2 (＊1)
10V 5600μF × 2 (＊1)
25V 470μF
50V 220μF
C3