This blog illustrates the measurement of the remote control pin available on the CUI INC® PDQ15 series of brick power supplies. Similar tests were conducted in a previous post with two MeanWell supplies.
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| CUI INC PDQ15 power supply |
Control Pin
From the CUI INC PDQ datasheet (page 2), the voltages required to drive the ON/OFF pin are listed as greater than 3.5V for ON and less than 1.2V for OFF.
Control Pin Input Voltage Measurements
To verify the operation of the control pin on the CUI INC PDQ converter, two outputs of a Rigol DP832 linear regulator power supply were used in the same manner as a previous blog which used MeanWell converters.
An initial test was conducted to determine the ON / OFF voltage hysteresis for the converter. Turn ON was 8.7V DC and turn OFF 8.0V DC. Tests were conducted with no input on the remote control pin (floating).
For the second test, one channel of the power supply provided the input supply to the DC to DC converter and the second channel on the supply provided the supply for the control pin. Both outputs of the power supply had a common 0V connection.
The supply input voltage was increased, from the threshold ON voltage and the control pin threshold voltages determined and recorded.
Measurements for the CUI INC PDQ15 is listed below.
From the CUI INC PDQ datasheet (page 2), the voltages required to drive the ON/OFF pin are listed as greater than 3.5V for ON and less than 1.2V for OFF.
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| Remote control pin specification |
To verify the operation of the control pin on the CUI INC PDQ converter, two outputs of a Rigol DP832 linear regulator power supply were used in the same manner as a previous blog which used MeanWell converters.
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| Rigol DP832 |
For the second test, one channel of the power supply provided the input supply to the DC to DC converter and the second channel on the supply provided the supply for the control pin. Both outputs of the power supply had a common 0V connection.
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| PDQ bench testing |
Measurements for the CUI INC PDQ15 is listed below.
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| PDQ Measurements for supply vs control pin voltage |
A visual representation of the above data is shown below.
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| PDQ Graphed measurements |
The graph shown above is scaled to show the small variation in voltages required to activate the converter using the remote control pin.
Note On Temperature
The cold body temperature of a PDQ15 converter was measured at 19.2C. With a 24VDC input supply connected, no load, the PDQ15 has a quiescent power of just less than 2W. After 30 min the body of the supply had raised to 57.1C.
Summary
The cold body temperature of a PDQ15 converter was measured at 19.2C. With a 24VDC input supply connected, no load, the PDQ15 has a quiescent power of just less than 2W. After 30 min the body of the supply had raised to 57.1C.
Summary
For this test of the characteristic response of the PDQ15 remote control pin, the measurements showed that it was similar to the MeanWell SKM series. The remote control ON/OFF voltages were flat after 14VDC although the voltages were not similar to the MeanWell SKM or SDM converters.
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