PAF600F280-28 TDK Corporation, PAF600F280-28 Datasheet - Page 48

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

PAF
B-140
PAF
8 Over Thermal Protection (OTP)
This power module has built-in OTP function. This func-
tion operates and shuts down the output when ambient
temperature or internal temperature of power module ab-
normally rises. OTP operates at 105℃ to 130℃ baseplate
temperature..
When OTP is triggered, output can be recovered by turning
input line off and then turning it on again after input volt-
age drops down to 0V, or by manual reset of the control
ON/OFF terminal, after temperature sufficiently decreased.
Reset time for ON/OFF terminal is 100ms or longer.
9 Remote Sensing (+S, -S terminal)
Remote sensing terminal is provided to compensate for
voltage drop across the wirings from the power module
output terminal to the load input terminal.
When remote sensing function is not used (local sensing),
short +S terminal to +V terminal and, -S terminal to –V ter-
minal.
Take note that voltage compensation range for line drop
(voltage drop due to wiring) is determined such that out-
put voltage at the output terminals is within output volt-
age range and that voltage between –V and –S terminals
is within 2V or less. Even for remote sensing case, use
power module such that output power is within specified
maximum output power. Furthermore, reduce noise effect
by using shield wire, twist pair, or parallel pattern.
 ON/OFF Control (CNT, SG terminal)
Without turning the input supply on and off, the output can
be enable and disabled using this function.
ON/OFF control circuit is on the input side (the primary
side), and CNT terminal pin is used. Use the SG terminal
as ground for CNT terminal.
If this function is not used, short the CNT terminal and the
SG terminal.
1） The maximum impressed voltage for the CNT terminal
2） ON/OFF terminal can be controlled by opening or clos-
is 35V and the maximum reverse voltage is 0.7V. Also
the source current for CNT terminal is about 1mA.
When wiring becomes long, connect a capacitor about
0.1µF value between the CNT and the SG terminal at a
nearest distance.
ing connections (with switch or relay), or by photo-
coupler ON/OFF.
Also for the secondary control, isolation can be
achieved through the use of a photo-coupler or equiva-
lent.
450F280, 600F280
Fig.9-2 Remote Sensing Not in Use
＋S
＋V
−V
−S
＋S
＋V
−V
−S
Fig.9-1 Remote Sensing at Use
+
+
Stabilize the output voltage at
load terminal
Stabilize the output voltage at
output terminal
+
Load
Load
＋
−
＋
−
 Parallel Operation (PC terminal)
By connecting the PC terminal of each power module,
output current can be equally drawn from each module.
A maximum of 11 units of the same model can be con-
nected.
Furthermore, be sure that the output power of every mod-
ule does not exceed the maximum output power value.
By setting output voltage accuracy of each module in a
parallel operation to within ±1 % , the maximum value of
the output current that can be drawn is 95% of the total
rated output current.
Refer to “Parallel Operation” of the PH-Series Application
Notes for details,
 Series Operation
Series operation is possible for PAF450F280, PAF600F280
series. Connections shown fig.12-1 and fig.12-2 is possible
 I.O.G. signal (IOG terminal)
Normal or abnormal operation of the power module can be
monitored by using the IOG terminal. Output of this signal
monitor is located at secondary side (output side) and is
an open collector output.
This signal is LOW when inverter is normally operating and
HIGH when inverter stops or when inverter is operating ab-
normally. (Maximum sink current is 5mA, maximum applied
voltage is 35V.)
Ground for the IOG terminal is the S terminal.
Also note that IOG becomes unstable for following
＊ When using photo-coupler, connect between the CNT
and the SG terminal to make transistor side shortest.
Ｈ (4V and above) or Open
Ｌ (0.8V and below)or short
Fig.12-1 Series Operation in High Output Voltage
＋S
＋V
−V
−S
＋S
＋V
−V
−S
＋S
＋V
−V
−S
＋S
＋V
−V
−S
Fig.10-1 CNT, SG terminal connection
Fig.12-2 ±Output Series Operation
Table 10-1 ON/OFF Control Mode
+
+
+
+
CNT Level
・All specifications are subject to change without notice.
Fuse
C1
＋
＋Vin
−Vin
SG
CNT
Output Status
Load
OFF
Load
Load
＋
−
ON
＋
−
＋
−