PI Forums

I'm trying to design 32 volt 7 amp smps. In the first place I wanted to design a 32 volt 2 amp smps and check if it works properly. The Top259EN chip explodes when I load about 600mA of current. When I measured after chip exploded, I saw that between

Hello, I'm working on a project to validate EMI requirement early on in the design process, which mean we need to accurately model the dynamic behaviors of all component. I have a flyback converter designed around the LNK3294 and there's not enough parameters in the datasheet to simulate this chip

What happens with 300VAC input if using HiperPFS? By the way, we only need to survive 300VAC....or any mains voltage above 265VAC....but what would happen if using HiperPFS in that case.. Could we simply shut it down? And wait for the mains to fall?

Hi, From page 14 of the HiperPFS datasheet it appears (?) that if vout is not set to 385VDC, then the divider to the voltage monitor pin needs adjusting and then this is said to mean a different Brown in and Brown out threshold. Is this correct? How has the

Hi, Page 18 of the HiperPFS Boost PFC controller datasheet says that a 33-100pF capacitor should be connected across the Boost PFC diode in order to prevent the internal FET’s B(Vdss) of 530V from being breached. Page 18 says that the 530V level is most likely to be breached during

Hi, Page 18 of the HiperPFS Boost PFC controller datasheet says that a 33-100pF capacitor should be connected across the Boost PFC diode in order to prevent the internal FET’s B(Vdss) of 530V from being breached. Page 18 says that the 530V level is most likely to be breached during

Hi, A contractor has given us a transformer manufacture spec for a 70W Offline Topswitch Flyback. For the secondary, he has 11 turns of 3 strands of TEX-FS 0.7mm triple insulated wire. This 11 turn secondary has a total width of 29.7mm, when the bobbin width is only 27.7mm. Would

I have a Design based upon LNK6766K. Output Required 24 Volt 1.5 amp. The problem is 1. Output voltage reaches up to 29 Volt while no Load is connected. While the design is for 24 Volt Only. The PCB has component that is rated up to 28 Volt. 2. Even

I have a Design based upon LNK6766K. Output Required 24 Volt 1.5 amp. The problem is 1. Output voltage reaches up to 29 Volt while no Load is connected. While the design is for 24 Volt Only. The PCB has component that is rated up to 28 Volt. 2. Even

Hi, I've designed 29V,1.17A (176-265VAC Input) power supply with PI-Expert and I did 50pcs trial production. I dispatched 25pcs to Country A and 25 pcs to Country B for field test. While Country A have no problem more than 2 months (till now) in the field test, In country B