Flypower 1A PS08B050K (Enerpower)

DSC_3727

Official specifications:
I got it from Enerpower

DSC_3726

DSC_3729

DSC_3732

DSC_3731 DSC_3733 DSC_3728




Measurements


Flypower%201A%20PS08B050K%20load%20sweep

The overload protection kicks in at 1.5A.

Flypower%201A%20PS08B050K%20load%20test

There is no problem supplying 1A for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

Temp2991

M1: 43,8C, M2: 42,9C, HS1: 75,0C
HS1 is the transformer.

Temp2992

M1: 56,5C, M2: 45,0C, HS1: 62,9C
Here HS1 is the rectifier diode.

Temp2993

M1: 37,8C, HS1: 49,3C

Temp2994

M1: 42,8C, M2: 41,5C, HS1: 74,7C
Again HS1 is the rectifier diode.

Temp2995

M1: 63,2C, HS1: 69,2C
The two hot spots are the transformer and the rectifier diode.

10ohm

Noise at 0.5A load is 13mV rms and 370mVpp

5ohm

Noise at 1A load is 18mV rms and 370mVpp



Tear down

DSC_4064

Putting pressure on the charger in my vice did open it.

DSC_4065

The chargers uses a resistor as a fuse and has a discrete bridge rectifier, between the two mains capacitors there is an inductor.
There is also a inductor between the two output capacitors.
This circuit do not use any opto feedback and to not have a safety capacitor between mains and low volt side.

DSC_4067

The two inductors can be easily seen from this side.

DSC_4068 DSC_4070

DSC_4069

DSC_4066

U1 is the mains switcher IC.
D7 is the rectifier diode, the white stuff is probably to get better heat transfer to the case.
Notice the missing resistor below the usb connector, they are for models with Apple coding.

DSC_4071

DSC_4072

There is fairly good isolation distance between mains and low volt side.

Testing with 2500 volt and 5000 volt between mains and low volt side, did not show any safety problems.



Conclusion

A fairly standard 1A charger, no problems and no fancy functions.



Notes

The charger was supplied by Enerpower for review.

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