Hi, I'm M.P.I. I know probably about you, Brian. Did you key? And eight of fruit every week, we find the latest and greatest new things this week is Texas Instruments Lady Eta. What is this week's new product introduction? I'm glad you asked. This week's I and M.P.I. is on the TI TPS 61022. It is a new all-in-one synchronous boost converter from TI. It looks like this. It's so small. It's a SOFT 5X3, I think is the package.  This thing features a 5.5 amp integrated control fet on the inside and can give you 1.8 volts to 5.5 input and 2.2 to 5.5 output. It is adjustable, but pretty much it's a 5-volt boost converter that can give you up to 2 amps from a lithium-ion or lithium-polymer battery. It's small. It's inexpensive. It's powerful. And it's kind of all-in-one because it's synchronous. And it has the internal, the past transistor, the power transistor internal to the chip. It also has a couple of settings like PFM versus PWM mode and has a power-good output. You might be familiar with this family. This is a similar chip. This is a 6-pin version. This is the TPS61-023, which we have used. And this one's great. This gives you about 1 amp at 5 volts output. And this baby we have in the stores are MiniBoost, which we expect you to put in a LiPo in, get 5 volts out, 1 amp. But a lot of people want more current. So that's why the TPS61-022, sorry, 033 comes in. Pardon me. So you can see it's super easy to get wired up. You need basically only an input capacitor, an output bulk capacitor, and a inductor, you know, half a microhenry or one microhenry inductor. The size of the chip is about 2 by 1.5 millimeters. And the inductor, you'll see, is about 4 by 4 millimeters. There is a feedback that you can use to connect if you want to have an adjustable output voltage. But if you just want 5 volts, it turns out you can just tie the FB pin to, I think, VIN. It'll automatically detect it and give you 5 volts out. We're familiar with the TI TPS series because we've used them a lot in our PowerBoost chips. It's a PowerBoost 501,000. Our boost converters that we've used to get from one cell lithium ion or lithium polymer to 500 milliamps or 1,000 milliamps or 1 amp. These are fairly old products. We've had these for, like, probably almost a decade now. It's probably been, like, six, seven years. We originally made this because there were a lot of people who wanted to make a DIY cell phone charger or who wanted to run something like an Arduino of a lithium-ion battery. And this is kind of an all-in-one board that doesn't have some of the downsides of USB power packs because you can, of course, get it off the shelf, lipstick power pack, but those often don't deal with low-current draw well. But also, they're not as easy to embed because they're kind of all in one. You can't change the battery size. So these boards are kind of designed for makers and creators who need 5 volts out and they have a chargeable battery in. So this one uses the PowerBoost 500 uses the TPS 61090 and then the PowerBoost 1,000 uses the TPS 61030. Those are two and four amp internal switch apiece. So two amp one will give you 500 milliamps out. Just remember that this switch has to handle the input current peak, not just the output current. And if you're boosting to five volts and you have 90% efficiency and your battery gets as low as 2.5 volts, blah, blah, blah, you can do the math. Basically, you can get 500 milliamps out of the TPS 61090 or one amp out of the TPS 61030. But people are always asking me, well, why don't you have the PowerBoost 2,000? Right? So if you have a 500 milliamp, 1,000 milliamp, but we want two amps. Why? Because you're getting something like Raspberry Pi, single board computer or you've got really big screens or you've got a lot of, you know, motors or whatever accessories you need two amps of power. Well, this chip will do it and it will do it at pretty good efficiency as well. If your VIN is around 3.3 to 3.6 volts, which is kind of what you'll get out of a lithium-ion battery in the prime of its life, 90% efficiency, you'll get two amps out at PWM mode. And then, you know, you could always go if you're dealing with low current. So on the right hand side, there's a graph of the efficiency with PFM mode. That's good for low current draw. So you see if you're dealing with 10 or less, yeah, basically like if you're under 200 milliamps, you might want to change to PFM mode, you'll get better efficiency. It's not good at high current. It's good at low current. So there's a GPIO pin, you know, or IO pin that you can connect to switch between the two. Of course, whatever you're using with this PowerBoost, sorry, the TPS chip, you'll need to know what the current is and adjust it. So it does require a little bit of finessing. It's not automatic. But there is a pin that you can use to easily control, which mode it's in. It's a fully synchronous integrated boost converter, which is nice. You can see that one of the benefits of that is, of course, the bill materials is less. You don't have to purchase a separate transistor or low forward-voltage shock diode.  I think it's like 20 and 40 milli ohm RDS on transistors. And it has a gate driver as well for you, which is super nice. It also means that the input and output are completely disconnected when disabled. The enable pin is off, which is really handy. So you don't have to worry about backpowering. The body diodes aren't something you have to be concerned about. And there's no leakage through some shocky diode. There, that mode pin on the left, that's the PFM versus PWM. There is a PG power-good output. You can use that to indicate LED or to connect to some other circuitry. It will tell you when the input power is sufficient to drive the output. Ground, again, feedback. You can use a wizard divider or just tie it to VIN. And then the enable pin, which can be used for total low-power disconnection of everything. It's a very small chip. Like I said, it's an 8-pin SOT 5X3, I think, is the part number. And the layout they designed, they made the pin so in order to make it very easy for you to do the layout with very big, chunky copper pores. And you'll need those copper pores, because remember, you're pulling about 5 and 1 half amps through these traces. So the VIN, VOUT inductor trace and the ground pads, you're going to want them to be very big. Of course, it's always better to do a four-layer, but I think you get away with two-layer, especially if you have two-ounce copper on the outer two layers. Just make sure you have a nice big ground plane and a nice VOUT and VIN plane. And you'll need the bulk capacitance as well. They do have some suggestions for whether you want to use electrolytic or tantalum or ceramic. And then don't forget the thing that is going to provide power to your battery if you're using lithium-ion battery. You can use a single 18650 cell, or this is three parallelized and goes through a protection circuit. But you need this to be able to supply five amps also, which is non-trivial. So just make sure whatever pack you use, or whatever battery or power source, you want to have a protection cell, but that protection circuitry can't trip before you hit the amount of current that you want to draw out of it. So it's something to consider when I first put together a chip, a boost converter with this kind of chip. I was like, why am I not able to get two amps out of it? Because my battery was current limiting it. Because that input has to be, again, much higher by the proportion of the input to the output voltage. Available voltage gain. It's in stock, lots of them, and about a dollar less in quantity, the TPS 61033. Sorry, I said 022. I got my numbers mixed. There is a 61022. It's also a very good chip. I think that was the 8 amp version, but it's not a new chip. It's a little bit bigger too. But this one would be great. And the data sheet even says, yes, absolutely you can get two amps out of this from lithium battery, five volts. So this one is a perfect power-boost 2000 chip. And that's this week's great search. Sorry, I had an MPI, which is a great search sort of. MPI on MPI.


The digital educational environment of K-12 education institutions should be designed to provide favorable conditions for students. This requires the development of an educational policy based on digital technology. To this end, the authors have developed a model and methods for assessing the use of digital technology in the educational process. They also adapted the European Tools Selfie for Ukrainian Education and used it to evaluate the implementation of digital technology at one school in Kiev. This article was authored by Natalia V. Morse and Victoria Okutrovska.