PXD2048S12 TDK Corporation, PXD2048S12 Datasheet - Page 3

• Manufacturer Part Number: PXD2048S12
• Description: LAMBDA PART
• Manufacturer: TDK Corporation
• Series: PXDr
• Type: Point of Load (POL) Non-Isolated with Remote On/Offr

Specifications of PXD2048S12

• Rohs Compliant: YES
• Output: 12V
• Number Of Outputs: 1
• Power (watts): 20W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 6-DIP Module
• 1st Output: 12 VDC @ 1.67A
• Size / Dimension: 2.00" L x 1.00" W x 0.40" H (50.8mm x 25.4mm x 8.6mm)
• Power (watts) - Rated: 20W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 88%
• Approvals: CE, CSA, EN, UL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 285-1522; PXD20-48S12

Remote On-Off Control
Negative Logic
To turn the module on and off, the user must supply a switch (or
equivalent circuit below) to control the voltage between the on/off
terminal Von/off and the Vi(-) input terminal. With an open circuit,
the module is normally off. To turn the module on, the voltage on
the Von/off pin needs to be 0V-1.2V. The maximum current Ion/off
should be limited to less than 200µA.
Positive Logic
To turn the module on and off, the user must supply a switch (or
equivalent circuit below) to control the voltage between the on/off
terminal Von/off and the Vi(-) input terminal. With an open circuit
the module is normally on. To turn the module off, the voltage on
the Von/off pin needs to be 0V-1.2V. The maximum current Ion/off
should be limited to less than 100µA.
The power module operates in a variety of thermal environments;
however, sufficient cooling should be provided to help ensure
reliable operation of the unit. Heat is removed by conduction,
convention, and radiation to the surrounding environment. Proper
Trim Tables
Below are five possible circuits for driving the ON/OFF Pin:
Thermal Consideration
P X D 2 0 1 . 5 V
Trim down
Vout=
RD=
Trim up
Vout=
RU=
TTL/
CMOS
Opto Isolated Remote On/Off
5V
1.485
5.704
1.515
4.578
1
1
Open Collector Remote On/Off
Vin (-)
On/Off Control
Vin (-)
On/Off Control
1.470
2.571
1.530
2.065
2
2
3055 Del Sol Blvd • San Diego, CA 92154 • 1-800-LAMBDA-4
(Permanently Disabled)
(Permanently Enabled)
1.455
1.527
1.545
1.227
Positive Logic
Positive Logic
On/Off Control
Vin (-)
3
3
On/Off Control
On/Off Control
Vin (-)
Vin (-)
1.440
1.005
1.560
0.808
4
4
Installation Data Sheet
1.425
0.692
1.575
0.557
5
5
cooling can be verified by
measuring the case
temperature. The case
temperature (Tc) should be
measured at the position
indicated in figure to the right.
When operating the module,
adequate cooling must be
provided to maintain the case
temperature at or below 100°C.
Maintaining a lower temperature
will yield higher reliability of the device. Optimum cooling is
obtained with forced convection.
External Trim (output voltage
adjustment, PXD20 - 20Watt only)
Output voltage set point adjustment allows the user to increase or
decrease the output voltage set point of a module. This is
accomplished by connecting an external resistor between the TRIM
pin and either the (+)Vout or (-)Vout pins. With an external resistor
between the TRIM and (+)Vout pin, the output voltage set point
decreases. With an external resistor between the TRIM and (-)Vout
pin, the output voltage set point increases.
See the following pages for values.
1.410
0.483
1.590
0.389
6
6
Flow Rate
Convection*
100LFM
200LFM
300LFM
400LFM
500LFM
Heatsink**
* Mounted vertically
** Optional heatsink 7G0020A (includes adhesive pad)
1.395
0.334
1.605
0.270
7
7
1.380
0.222
1.620
0.180
8
8
1.365
0.135
1.635
0.110
9
9
16.20
10.00
12.98
10.47
TRIM (20W)
Θ Θ
(+) Vout
(-) Vout
8.47
6.61
6.12
°C/W
1.350
0.065
1.650
0.054
10
10
Top View
KOhms
KOhms
Volts
Volts
(+) Vin
(-) Vin
CTRL
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