Adafruit Powerboost 1000C Created by lady ada Last updated on 2017-03-10 08:56:30 PM UTC
Guide Contents Guide Contents Overview Pinouts Power Pins Control Pins LEDs Battery and USB connection Assembly Attaching USB connector On/Off Switch F.A.Q. Downloads Datasheets Downloads Schematic Fabrication print © Adafruit Industries https://learn.adafruit.
Overview PowerBoost 1000C is the perfect power supply for your portable project!With a built-in load-sharing battery charger circuit, you'll be able to keep your power-hungry project running even while recharging the battery! This little DC/DC boost converter module can be powered by any 3.7V LiIon/LiPoly battery, and convert the battery output to 5.2V DC for running your 5V projects.
brown-outs during high current draw because of USB cable resistance. The PowerBoost 1000C has at the heart a TPS61090 boost converter from TI (http://adafru.it/duQ). This boost converter chip has some really nice extras such as low battery detection, 2A internal switch, synchronous conversion, excellent efficiency, and 700KHz high-frequency operation. Check out these specs! Synchronous operation means you can disconnect the output completely by connecting the ENable pin to ground.
(power and low batt LED are off) To make this even more useful, we stuck a smart load-sharing Lipoly charger on the other side. The charger circuitry is powered from a microUSB jack, and will recharge any 3.7V/4.2V LiIon or LiPoly battery at 1000mA max rate. There's two LEDs for monitoring the charge rate, a yellow one tells you its working, a green one lights up when its done.
MCP73871 maxes out at 1.8A (http://adafru.it/aMO) This charger-booster is great for powering your robot, Arduino project, single-boardcomputer such as Raspberry Pi or BeagleBone! Each order comes with one fully assembled and tested PCB and a loose USB A jack. If you are powering your project from USB, solder the USB A jack in (a 3-minute soldering task). If you would like to use a terminal block, pick up a 3.5mm 2pin block here (http://adafru.
If you're trying to figure out how much current your project is using, check out the CHARGER DOCTOR! (http://adafru.it/1852) © Adafruit Industries https://learn.adafruit.
Pinouts For many people, the PowerBoost 500C can be used with just the microUSB charge input, battery plug and power outputs. However, we have a couple handy breakouts so lets get started! Power Pins There's three power voltages, the USB input for charging the battery (4.75-5.25V whatever is coming out of the USB port), the battery itself (3-4.2V) and the output (5-5.2V) USB - this is the micro USB 5V power pin. It's the pin that is used to charge the © Adafruit Industries https://learn.adafruit.
battery, NOT the output power! You can use this if you want to grab power from the microUSB port when it is plugged in BAT - this is the battery input, connected directly to the JST connector. For most Lithium batteries, this will range from 3.0V when near-dead to 4.2V when fullycharged. Higher voltages will let you draw more current and in general, are more efficient. Try to keep the wires going to this pin nice and short - 3" or less is best! VS - this is the load shared output from the battery charger.
The Yellow LED is next to the microUSB connector and indicates when the battery is being charged The Green LED is also next to the microUSB connector and indicates when the battery is done charging (all full) Battery and USB connection You can connect a battery to the breakout strip or to the JST connector. All of Adafruit batteries come with JST cables that will plug in nicely so we strongly suggest that.
If you don't want a USB connector attached, there are two holes that are designed for a 3.5mm spaced terminal block (not included) Some third-party LiPo cells have JST connectors wired opposite from the standard. Connecting these to the PowerBoost will damage your PowerBoost. Double check the polarity before connecting. © Adafruit Industries https://learn.adafruit.
Assembly Attaching USB connector If you'd like to plug in something that can power from a USB port, the included USB connector will do the job! You will need to solder it in place, however. Press-fitting wont work! Snap the USB connector in so that all of the pins go through the PCB. Make sure you're solder them on the back of the PCB © Adafruit Industries https://learn.adafruit.
Solder the four power/data lines © Adafruit Industries https://learn.adafruit.
Finally, solder the two mechanical tabs on the side to keep the USB connector solidly in place. On/Off Switch The PowerBoost 1000C does not come with an on/off switch for the output, but its very easy to add one! Just grab a Breadboard friendly SPDT slide switch from the adafruit shop. (http://adafru.it/drN) We will be turning the boost on/off via theENABLE pin, so the switch does not have to carry any power, it is only signalling to the boost converter what to do. This means the switch can be small.
The switch will go into the breakout header, and attach to VS EN and GND The switch is symmetric so as long as those three pins are attached to the switch you are good to go © Adafruit Industries https://learn.adafruit.
Before soldering, check that you have the right three pins! I used some tape to keep the switch in place while soldering Flip over to solder the three pads in place © Adafruit Industries https://learn.adafruit.
Solder in all three pins with any kind of solder making sure you have a good connection © Adafruit Industries https://learn.adafruit.
Clip off the long pins with diagonal cutters When the switch is to the left, the 5V power will be on, you can tell because the blue LED is lit Slide to the right to turn it off. © Adafruit Industries https://learn.adafruit.
© Adafruit Industries https://learn.adafruit.
F.A.Q.
Downloads Datasheets TPS61090 datasheet (http://adafru.it/duS)(the DC/DC boost control chip used) MCP73871T-2CCI datasheet (http://adafru.it/aMO) (the USB LiPoly charger chip used) Downloads PCB files on GitHub (http://adafru.it/rDU) Fritzing object in the Adafruit Fritzing Library (http://adafru.it/aP3) Schematic Click to embiggen © Adafruit Industries https://learn.adafruit.
Fabrication print Dimensions in mm & inches: © Adafruit Industries https://learn.adafruit.
© Adafruit Industries Last Updated: 2017-03-10 08:56:29 PM UTC Page 23 of 23