PAQ50S48-1R8 TDK Corporation, PAQ50S48-1R8 Datasheet - Page 17

• Manufacturer Part Number: PAQ50S48-1R8
• Description: LAMBDA PART
• Manufacturer: TDK Corporation

Specifications of PAQ50S48-1R8

• Rohs Compliant: YES

・All specifications are subject to change without notice.
PAQ
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 exceed OVP set point, output voltage
shut down. OVP set point is fixed and therefore can not
be changed. When OVP is triggered, output can be recov-
ered 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 200ms-
500ms 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 function
operates and shuts down the output when temperature 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 wirings from the power module
output terminal to the load input terminal. When remote
sensing function is not used (local sensing), short +S ter-
minal to +V terminal and, -S terminal to –V terminal.
Take note that voltage compensation range for line drop
(voltage drop due to wiring) should be kept such that out-
put voltage at the output terminals is within output volt-
age range and the maximum power is not exceeded. Use
shielded wire, twist pair, or parallel pattern to reduce noise
effect.
Input voltage for OVP reset: 24VDC and below
-S48
＋S
＋V
−V
−S
Fig.9-1 Remote Sensing in Use
Stabillize the output volftage at load
+
Must be as thick as possible
Twised
+
Load
＋
−
 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
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.
 Parallel Operation
Parallel Operation can not be used.
Fig.9-3 Load pattern layout example （by） using double side PCB
＊When control function is not used, CNT terminal is shorted
＊
＊
＊
（1）Output ON/OFF control
（2）Secondary (output side) control
Fig.9-2 Remote Sensing Not in Use （ Local Sensing）
CNT Terminal Level to -Vin Terminal
to –Vin terminal.
When using long wiring, for prevention of noise, attach a
0.1μF capacitor between CNT Terminal and –Vin terminal.
At L level, maximum source current from CNT Terminal to
–Vin terminal is 0.5mA.
The maximum CNT Terminal voltage when it is opened is
35V.
H Level (4V≦H≦35V) or Open
L Level (0V≦L≦0.8V) or Short
＋V
−V
Transistor, Relay
or Equivalent
＋S
＋V
−V
−S
(output side)
Secondary
Fig.10-1 CNT connection
Stabillize the output voltage at output load
Overlap on both sides pattern
+
- V pattern
+V pattern
＋Vin
−Vin
CNT
＋Vin
−Vin
CNT
Series
PAQ
Series
PAQ
Output Status
Load
＋
−
＋
−
Load
OFF
ON
B-241
PAQ