from the data sheet. .. Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied. API Datasheet – AP1 Pinout – On Semiconductor, datasheet, API pdf, API pinout, equivalent, data, API circuit. Datasheet – production data. Features. • Output switch current in excess of A. • 2 % reference accuracy. • Low quiescent current: mA (typ.).

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After scouring the web for sample circuits, I found one that was based on the SGN.

Well, the circuit had problems and I spent entirely too much time trying to get it to work. I guess the SGN has been around quite a while, but the amount of hobbyist understandable information is very small. The way the passive components are connected to the MC depend on what type of power supply you are building: I am building a boost circuit, so the overall circuit darasheet will look like this:. This 34063xpi where the calculator comes in. To use the calculator, you are going to need to know.

The value for Co is really big. Using the worksheet found in the TI datasheet, here are my calculations. I arbitrarily decide to use a K ohm resistor for R2 so I just need to do xatasheet algebra to determine what R1 must be:. Wish I had found this before. It explains everything, better than I can.

Hi Dan Thanks for sharing. MC has 40V maximum rating. There is many newer products for Boost converters. Thanks for the comment. When I looked at the datasheet, I interpreted it as a maximum of 40V in. Now that I read it again, what you say makes sense and the internal transistors datsheet only 40V.

I am rather much limited with using through-hole components since the rest of the project is being built that way. Finding through-hole packages in nowadays is very hard. I find that for prototyping on a breadboard or perfboard, it is handy to have a selection of SMD-to-TH adapter boards on hand for different footprints. If the MC were suitable for the voltage and current you require, an added advantage of it is datadheet the one part is capable of being utilized in buck, boost, or inverting circuits.

Even the SG that I had initially tried to use is not acceptable either and, if I recall, everything else I looked at was ridiculously expensive if I ever hope to do something commercial with my project. As soon as it does, I simply connect it to the telco line via SSRs. Have you considered masking the ring signal?


Because the ring signal is AC superimposed on the DC, masking the ring 3406api be a matter of introducing a diode bridge between the phone line and the handset. This should serve to disable the ring signal for the connected handset without disabling the line for making calls or picking one up because you can hear a ring elsewhere or if you have ESP.


A single pole double-throw switch or an equivalent relay device would serve to switch one phone lead between the bridge or directly to the line to re-enable the ring. No 5v supply or boost necessary, and it should have no impact on other phones not clients to the bridge setup. Your phone is also never actually disconnected from the phone line for making calls.

My box interrogates caller ID while the handset is disconnected. Once my box determines the call can pass, it regenerates caller id for the handset, then connects it back to the telco so I can hear the phone and still see who is calling.

API Datasheet – AP1 Pinout – On Semiconductor

I am trying my best to keep the telco side extremely simple to decrease my chances of problems getting FCC certification if I ever manage to get that far. The telco side has only 2 SSRs transferring control of the handset between myself and the telco and a device already certified to provide CID.

I spent a ridiculous amount of time trying to get an inverting boost power supply working to provide V. A straight boost power supply was, comparatively, a piece of cake.

12v to 5v DC high efficiency SMPS buck converter using IC. | All About Circuits

Then out of the blue it occurred to me to just switch the polarity for the handset. As far as it is concerned, it is getting well, V anyway. So, where is the 5V coming from? Does the device have to run off of batteries or 34063wpi wall-wart?

That drives a Teensy MCU which then provides 3. The SSRs are connected such that if there is no signal from the Teensy, the handset is connected to the telco the N. Take a look at figure 27 in http: This uses a step-up transformer to get the voltages you desire. I have not tried this configuration myself and cannot offer any further advice! But I recently found these cheap little adapter boards on amazon 34603api can be found in a variety of IC packages for example https: You are commenting using your WordPress.

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Notify me of new comments via email. Notify me of new posts via email. This site uses Akismet to reduce spam. Learn how your comment data is processed. Big Dan the Blogging Man. Dataseet Contents About Documents Index. References First, here are some references: High Voltage Ringer — This is the original post I stumbled across that gives a rough dayasheet of the IC and a decent schematic of its use. Datasheet — This, the TI datasheet, is the best as it contains all of the necessary calculations for the passives.


The ON datasheet found elsewhere is missing these calculations. Theory and Applications — quite useful for understanding all the various ways the IC can be used. How to Build a Switch Mode Power Supply Circuit with an MC — Great dattasheet and really helped me calculate the passive values by hand though his examples were vague in a few places.

Determining the Overall Circuit Layout The way the passive components are connected to the MC depend on what type of power supply you are building: I am building a boost circuit, so the overall circuit layout will datashete like this: There are a few components that have static values: Cin — This capacitor is next to 34063spi and should be uF.

R — This resistor should be ohms. D — This is a schottky diode of sufficient power rating. To use the calculator, you are going to need to know Vin — this is the minimum input voltage. Vout — this is the required output voltage.

Iout — this is the output current. I datwsheet 25mA note that the input current will be much higher than the output current when stepping up this far — in my final tests, it takes mA 5V to generate 25mA 48V.

Vripple — datashedt voltage ripple in the output. Fmin — the minimum frequency. The chip runs at a max of MHz, so that is what I use. Using these requirements, according to the calculator, the passive values should be: Closest I have is pf. Ipk — the peak input current should be mA.

How to Build a Switch Mode Power Supply Circuit with an MC34063

So my input power supply and inductor need to be able to support that much current. L min is 72uH. The next size inductor up I have is uH. I arbitrarily decide to use a K ohm resistor for R2 so I just need to do some algebra to determine what R1 must be: This worked amazingly well.

I got about Here is my final circuit: Jan 22 update: This entry was posted in c-electronics and tagged SMPS. January 16, at 5: January 16, at 9: Can you recommend anything that is through-hole? January 16, at January 22, at 8: January 22, at 2: January 25, at 2: Ring disable may or may not work with a half-wave rectification.

January 25, at datashret January 25, at 9: January 25, at December 13, at 8: December 13, at

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