The µA78S40 is a switching regulator subsystem, consisting of a temperature compensated voltage reference, controlled–duty cycle oscillator with an active. 78S40 datasheet, 78S40 circuit, 78S40 data sheet: NSC – Universal Switching Regulator Subsystem,alldatasheet, datasheet, Datasheet search site for. 78S40 datasheet, 78S40 circuit, 78S40 data sheet: ONSEMI – UNIVERSAL SWITCHING REGULATOR SUBSYSTEM,alldatasheet, datasheet, Datasheet search.

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I found this attached file on the 78S40 datasheet. Sep 27, 8. Media New media New comments Search media. The L and C values are determined by Ton and Toff, which is a function of the switcher frequency, in this case the frequency is 1MHz. Sep 27, 7. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. The formulas from that datasheet make some assumptions about the circuit.

R2 ratio, so that there is 1. High voltage 50v step down regulator Posted by MattP in forum: How the output voltage is calculated? The attached image is from the data sheet 1.

I’ll see if I can find it. Step-down switching regulator 12v to 3. Your name or email address: But I’ve seen it on the boards here and adtasheet more simple than the inductor. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at No, create an account now.


As 78s400 has suggested have a look at simple switchers, or look at the 78S40 data sheet Sep 27, 3. Potentiometer Questions Started by norbss Yesterday at Oct 27, 6, 1, Sep 28, Although I’m not dstasheet if it will switch that high Sep 27, 5. Sep 7, 2, If i wanted a Vout of say 20 Volts instead of the 10 what would I need to change for this to occur.

Sep 27, 9. Hi Guys, I am trying to figure out from the maths of a Step-down Switching regulator. And what about C value? Thank you Smanches, Sep 27, 6.

78S40 데이터시트(PDF) – ON Semiconductor

Yes, my password is: Vital knowledge for any designer. Plus, you always have to use the worst case values.

Sep 27, Hello, I want ot design a buck converter with the following specifications: You must log in or register to reply here. You May Also Like: Do you already have an account? So you need to change R1 to change the 10v output. The 78S40 chip is so old, it’s data sheet may have gone through some “cut downs” which is what they do with old products that they don’t want to waste a lot of catalog pages on.


Thread starter jayce Start date Jul 8, How would I know the peak current which this is designed.?

Maybe C is not necessary L and the load make a filter? In the case of a buck, it’s max Vin, and min Vout and max Iload. Welcome to our site!

Datasheet «78S40»

Sep 27, 2. Electro Datashset is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Boolean Identities The main identities associated with Boolean algebra are presented and discussed in detail. Click here to register now.


Articles Top Articles Search resources. For 20v output you would have 1. Sep 27, 4. Quote of the day. By continuing to use datawheet site, you are consenting to our use of cookies. Forums New posts Search forums.