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CC2541 wireless power

Other Parts Discussed in Thread: CC2541, BQ24200, BQ51050B, TPS62730

Hello,  I was wondering if it was possible to use the wireless power solutions with the CC2541 Sensor tag?  If not, are there other rechargeable options for the CC2541?

Thanks,

Rick

  • Hello Richard,

    There are a number of different options for connecting the SensorTag to a secondary power source, the CR2032 being the primary one.

    1.  The SensorTag can be connected to the EZ430-Battery Pack http://processors.wiki.ti.com/index.php/SensorTag_User_Guide#Battery_Pack_.28Purchased_Seperately.29

    2.  Use the BQ24200 (my favorite choice) with two diodes that allow for charging of a Li ion battery and the use of an adapter.

    3.  For a wireless solution, the BQ51050B receiver looks like a good choice since it integrates a Li-Ion charger. http://www.ti.com/lit/gpn/bq51050b

    The SensorTag has a TPS62730 DC/DC converter with a Vin max or 3.9V.  The lowest output for the charges are 4.1 or 4.2V.  A diode can be used to provide the necessary voltage drop  for safe operation..

    Pin 5 on the SensorTag Terminals is VCC (VDD_EXT).  It is not connected.  There is a open R040 resistor pad.  You would need to put a jumper across this to power the TPS62730.

    You can also bypass the TPS62730 and connect you own regulated supply (VDD_REG) to Pin 2 of the SoC Debug /Flash header.  The CC254x can handle a 5V supply (it is not recommended though).  You would have to verify the supply voltage levels for the onboard sensors before using this method to connect directly to a charger.

    Thanks,