PI Forums

Hi, On page 18 of the innoswitch3-EP datasheet, the innoswitch is not right under the transformer....is this deliberate?...wouLD it not work if put right beneath the transformer?

Hello, I'm trying to implement the PI-Expert generated PSU circuit (attached) based on the InnoSwitch3-CE. The first thing I noticed is the missing circuit for current sense resistor. According to the datasheet of the device, it has to be connected across GND and IS pins of the device. Example application

Hi, We are doing a 24V, 17W circuit with LNK3209. VAC input is 100-265VAC. Pg 13 of AN-70 by Power Integrations says that we must put a capacitor across the upper feedback resistor, of value 470nF to 47uF. This, it says, is needed, because otherwise it wont start up within

Hi, LNK3209 datasheet gives minimum on time = 591ns and Leading edge blanking time = 450ns Does this mean that minimum on time is more likely (591+450) ns?

Hi POWER INTEGRATIONS Team, This is Siddesh from Flex Component Engineering Team. We are working on some of your manufacturing parts and require information on the below questions. Could you please provide below MPN details as quick as possible as it's an urgent request from our site. End Customer: CHARGE

Hello, I am doing a startup testing for a LNK6763K based 15W flyback converter. My query is regarding the sudden current shoot-up, which was observed by probing the voltage across resistor at PD pin. The current is rising smoothly at startup, but there is sudden spike of 16.4V every 60ms

Hello, I am making a SMPS using TNY288DG (AC input ranging from 85 to 265VAC, DC output 20V, 0.5A). The circuits from PIExpert and from a designer program are in the attachments (they both are slightly different because sometimes I had to use other components than determined by PIExpert). The

Hi, AN-70 says a cap may be needed across upper divider res in LNK3209, to stop it dropping out at startup.....they say up to 47uF...and that it may interfere with control...so why not do it like the "soft finish" cct with two diodes, that power integrations always used to recommend

INN3878C带载12V/3A可以正常输出，带载12V/4A无法输出。原边励磁电感530uH，副边采样电阻3m欧。利用PD诱骗芯片将输出电压设置为12V。图片中黄色波形为BUS开关前面电解电容的电压。

Hi Team, We are using BRD1260C IC in one of our motors application. The BPH (Bootstrap Cap) we are using is 4.7uF. Our motor frequency is around 45Hz to run with 1400RPM. so is the Bootstrap capacitor value sufficient? or do we need more value? The Top & bottom pulse