Bro_T
Newbie level 3
in my AC/DC power supply circuit, I first use a voltage dropping capacitor to reduce incoming voltage. For the load stability, then I add the NCP1010(current model regulator) circuit as the 2nd level. Here is the findings:
1. Voltage dropping circuit itself is ok. Without the NCP1010 circuit it can get ~180v on the resistance(15K), ~2W.
2. But after adding the NCP1010 circuit, the voltage on the resistance(15k) is only ~50v. Accordingly the final output is far below the expected 5v. Total consume is <<2W.
Anyone could tell me what's the problem. Why I can' t get the final 5v with this circuit?
1. Voltage dropping circuit itself is ok. Without the NCP1010 circuit it can get ~180v on the resistance(15K), ~2W.
2. But after adding the NCP1010 circuit, the voltage on the resistance(15k) is only ~50v. Accordingly the final output is far below the expected 5v. Total consume is <<2W.
Anyone could tell me what's the problem. Why I can' t get the final 5v with this circuit?