USB-C PD 45W FA-045WPD

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Official specifications: I got it from Aliexpress dealer: iTechnology Life

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Measurements

USB-C%20PD%2045W%20FA-045WPD%20PD5V%20230V%20load%20sweep

The output is rated for 3A, but the overload first kicks in slightly above 3.5A

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USB-C%20PD%2045W%20FA-045WPD%20PD12V%20230V%20load%20sweep

USB-C%20PD%2045W%20FA-045WPD%20PD15V%20230V%20load%20sweep

The overload protection is around 3.5A up to 15V, slightly above at 5V and slightly below at higher voltage.

USB-C%20PD%2045W%20FA-045WPD%20PD20V%20230V%20load%20sweep

At 20V the output is down to 2.6A

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And the same at 120VAC input.

USB-C%20PD%2045W%20FA-045WPD%20PD15V%20230V%20load%20test
I did the 1 hour test at 15V 3A, this looks fine.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp6820

M1: 55.9C, HS1: 71.9C
HS1 is the transformer.

Temp6821

M1: 58.5C, HS1: 59.8C

Temp6822

M1: 52.0C, HS1: 63.5C

Temp6823

M1: 66.8C, HS1: 72.3C
HS1 is the circuit board, it is heated by the synchronous rectifier transistor.

Temp6824

M1: 62.1C, HS1: 70.1C

10ohm

At 0.5A load the noise increases to 17mV rms and 168mVpp.

5ohm

At 1A load the noise increases to 15mV rms and 159mVpp.

2.5ohm

At 2.5A load the noise increases to 10mV rms and 124mVpp.

5ohmPD12V

At 2.4A load the noise increases to 17mV rms and 308mVpp.

10ohmPD20V

At 2A load the noise increases to 19mV rms and 378mVpp, the noise is low, even at 20V.



Tear down

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I could break the bottom/plug part of the charger and get it open.

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At the mains input is a fuse (F1), a inrush current limiter (NTC1) , a common mode coil (L1), then the bridge rectifier (BD1) and the capacitors (C1, C1A, C1B).
The mains switcher transistor (Q1) is on a aluminium heatsink. There is a safety capacitor (CY1) to the low volt side. The USB connector is on a small circuit board.

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On this side is the mains switcher (Marked: 1781-30 / RA9F6.03 / TA1741), opto feedback (IC2). The low volt side has synchronous rectification with a transistor (Q5) and a chip (Marked: 603K).
This circuit board do not contain any USB-C/PD handling and can be used for both QC and PD chargers.

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The small board is a bit difficult to see, I need to take it out.

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This small circuit board contains a power mos (Q6) to turn on/off the USB voltage and a controller (Marked: 9000 / UA / 1817). I am missing a resistor to measure current across, it must be the zero ohm resistor (R37) that is used for that.

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There is good distance between mains and low volt side in this charger.


Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.



Conclusion

This charger is good for a cheap PD charger, it has lots of power, low noise and also older USB coding (QC+DCP), I did not see any safety problems.



Notes

Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger