PAH50S48-24 TDK Corporation, PAH50S48-24 Datasheet - Page 78

• Manufacturer Part Number: PAH50S48-24
• Description: POWER SUPPLIES
• Manufacturer: TDK Corporation

Specifications of PAH50S48-24

• Rohs Compliant: YES

PAH
B-220
PAH
output voltage drops down below lower side of adjustment
range for 20ms - 50ms by output short circuit or over load
conditions, output might be shut down.
Output can be recovered by manual reset of the control
ON/OFF terminal or by turning input line off and then turn-
ing it on again.
7 Over Voltage Protection (OVP)
This power module has built-in OVP function.
OVP set point is relative to the rated output voltage value.
When output voltage exceeds OVP set point, output volt-
age shuts down. OVP set point is fixed and therefore can
not be changed. When OVP is triggered, output can be
recovered by turning input line off and then turning it on
again after lowering the input voltage below the voltage
value indicated below or by manual reset of the control
ON/OFF terminal.
/V Option (automatic recovery)
The /V optional model will re-start with delay of 100ms 〜
400ms after shutdown by OCP or OVP triggering. When
over voltage and over current are removed, output will re-
cover normally.
Verifying OVP function shall be done by increasing output
voltage with external resistor. For verifying OVP function,
avoid applying external voltage to output terminal because
this will cause power module damage.
8 Over Thermal Protection (OTP)
This power module has built-in OTP function. This func-
tion operates and shuts down the output when tempera-
ture of the power module rises abnormally. Take note that
OTP will operate again unless the cause of abnormal heat
of the power module is eliminated.
For the details of OTP, refer to the clause of “Mounting
Method and Thermal Condition”
9 Remote Sensing (+S, -S Terminal)
Remote sensing terminal is provided to compensate for
voltage drop across the wiring from the power module out-
put 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.
Fig.9-1indicates connections when the remote sensing
terminal is used. For optimum operations, connect elec-
trolytic capacitor as large capacity as possible (within
10,000µF) between +V and –V terminal, as well as across
the load terminals. Take note that voltage compensation
range for line drop (voltage drop due to wiring) should
be kept such that output voltage at the output terminals
is within output voltage range and the maximum power
doesn't exceed Use shielded wire, twist pair, or parallel
pattern to reduce noise effect. When the remote sensing
terminal is used, if the load wiring impedance is large, out-
put power may disrupt the stability. To reduce the load wir-
ing impedance, wiring should be thick and short as much
Input voltage for OVP reset: 24VDC and below
200H
（1） Output ON/OFF control
as possible. When using the lead wiring, the wire should
be twist pair, or when using the pattern, use the pattern
layout as shown in fig.9-3 to reduce the impedance as
small as possible.
 ON/OFF Control (CNT Terminal)
Without turning the input supply on and off, the output can
be enabled and disabled using this function. This function
also can be used for output sequence of plural modules.
There are two kind of logic control, negative logic control
and positive logic control, depend on the option selected.
ON/OFF control circuit is on the primary side (the input
side), CNT Terminal pin. For secondary control, isolation
can be achieved through the use of a opto coupler or relay.
Standard
[/V option]
[/P option]
[/PV option]
＊When control function is not used for the Standard,
＊When using long wiring, for prevention of noise, attach
＊At L level, maximum source current from CNT terminal
＊The maximum CNT Terminal voltage is 35V.
CNT terminal is shorted to –Vin terminal.
a 0.1µF capacitor between CNT Terminal and –Vin
terminal.
to –Vin terminal is 0.5mA
Fig.9-3 Example of Load Wiring Pattern Layout
＋V
−V
Fig.9-2 Remote Sensing Not in Use
Negative Logic
Positive Logic
Fig.9-1 Remote Sensing in Use
in using the double-sided PCB
＋S
＋V
−V
−S
＋S
＋V
−V
−S
Logic
Overlap top and bottom pattern
Stabilize the output voltage at output teminal
Transistor, Relay
or Equivalent
・All specifications are subject to change without notice.
(Local Sensing)
Stabilize the output voltage at load
+
+
As short and thick as possible
H Level (4V≦H≦35V) or Open
L Level (0V≦H≦0.8V) or Short
H Level (4V≦H≦35V) or Open
L Level (0V≦H≦0.8V) or Short
CNT Terminal Level to -Vin Terminal Output status
−V pattern (Top side）
＋V pattern (Bottom side）
Twisted
＋Vin
CNT
−Vin
PAH200H
series
+
Load
＋
−
＋
−
Load
Load
＋
−
OFF
OFF
ON
ON