The Coulomb Counter uses under 1mA when it’s running, and you can use the SHDN (shutdown) input to reduce its power consumption further (though it will not be able to keep track of current use while shut down). ![]() This is so that the small amount of power used by the Coulomb Counter itself is included in its measurements for maximum accuracy. Note that the Coulomb Counter is powered by the IN header (usually your battery) and not by the VIO pin, which is used only as a voltage reference for the output pins. Thus, if you see a signal named RESET, you must provide a low signal to reset the part, and keep it high at other times. In negative logic, a low logic level means the signal is asserted or active. PROTIP: When you see a signal name that contains an asterisk or has a line over it, that’s an indication that this signal uses “negative logic”. ![]() This pin can be left disconnected if you do not need the shutdown function. There is a pullup resistor from this pin to VIO, so if you leave it disconnected, the board will remain active. If SHDN is low, the chip will be held in reset. This pin can be left disconnected if SJ1 is closed and you are using interrupts to sample INT. This is done automatically if SJ1 is closed (ties CLRand INT together). If INT is low, make CLR low to reset INT. High = current from OUT to IN (charging). Low = current from IN to OUT (discharging). Is cleared (goes high) when CLR goes low. ATmega16HVA and ATmega406 are examples of devices featuring this. Goes low when 0.0001707 amp-hours have passed through the board. This is the reference used for the internal Voltage ADC and Coulomb Counting ADC. Note that you may need to change jumper settings (see above). Depending on what you want to do, you’ll need at least the first four pins: NameĬonnect to 3.3V or 5V depending on your system. These are the pins you’ll need to connect to your microcontroller. Indicates Charge Quantity and Polarity.Īt the other end of the Coulomb Counter, you’ll find a header with six pins.Simply install this breakout out between your power source and your circuit, that way all the current your circuit uses needs to pass through the Coulomb Counter to be measured. These are the pins you’ll need to connect to your microcontroller and include VIO (Voltage Input), INT (Interrupt), POL (Polarity), GND (Ground), CLR (Clear), and SHDN (Shutdown). At the other end of the Coulomb Counter you’ll find a header with six pins. Connect your battery or power supply to the IN header or JST battery connector (they’re identical), and connect the OUT header to your project. When used effectively and if you start with a full battery, you’ll always know exactly how much of it is left!Īt one end of the Coulomb Counter Breakout are headers labeled IN and OUT. This breakout is capable of constantly monitoring the current your sensor is using, is able to add it up, and will give you a pulse each time a given amount of amp-hours have been used. If you are wondering: a coulomb is defind as, to put it simply, one amp for one second. ![]() You can get various elements regarding the battery status: Debug.WriteLine($"Battery:") ĭebug.Odometers are extremely useful for cars, they tell you how far you have gone, wouldn’t it be nice if you were able to have a device that does the same for electrical current? The LTC4150 Coulomb Counter Breakout is here to be your odometer for current. If ((status & ButtonPressed.ShortPressed) = ButtonPressed.ShortPressed)Įlse if ((status & ButtonPressed.LongPressed) = ButtonPressed.LongPressed) You can then have both a short and a long press, you can get the status like this: var status = power.GetButtonStatus() TI’s BQ26231 is a Cost-Efficient Coulomb Counter for battery capacity monitoring In embedded portable applications. The IC unit 50 included in the coulomb counter 100 includes a fully differential input operational amplifier 1 and a comparator 5 as will be described later. The status is kept in the registers up to the next status read. Power.SetButtonBehavior(LongPressTiming.S2, ShortPressTiming.Ms128, true, SignalDelayAfterPowerUp.Ms32, ShutdownTiming.S10) Power.EnableButtonPressed(ButtonPressed.LongPressed | ButtonPressed.ShortPressed) One button is available and can be setup to track short and long press: // This part of the code will handle the button behavior Important: make sure you read th documentation of your battery and setup the proper charging values, stop current. I2cDevice i2cAxp192 = new(new I2cConnectionSettings(1, Axp192.I2cDefaultAddress)) Usage // Make sure you configure properly the I2C pins, here example for ESP32Ĭonfiguration.SetPinFunction(22, DeviceFunction.I2C1_CLOCK) Ĭonfiguration.SetPinFunction(21, DeviceFunction.I2C1_DATA) Initialization code for this device can be found here. Registers can be found here (Chineese only, note: bing translator make miracle). Product documentation can be found here. AXP192 - Enhanced single Cell Li-Battery and Power System Management IC Documentation
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |