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BQ500212A: My BQ500212A EVM does not work anymore

Srujana Patel
Prodigy 250 points
Part Number: BQ500212A
Other Parts Discussed in Thread: BQ51003

Hello,

I was testing the Bq500212A and BQ51003 EVM modules and was checking for the efficiency. 

Following the Bq500212A EVM test procedure, I supplied 5V and 3A current limit at J1 and J2. After placing the BQ51003 EVM on it, the receiver is tripping with a blinking red LED after 200mA. Why is this happening?

I have set jumper JP3 from TS to EN and JP6 from ILIM to ADJ. R3 and R16 are set to 10kohm and 600ohm respectively.

Expecting this to be a procedure following issue, I started to follow the BQ51003 EVM and applied 19V and 1A current limit to the power supply of TX EVM (i.e., J1 and J2 pins). But, it stopped displaying D5 LED status now.

Now, my TX module does not switch on even with micro USB. Could you please tell me what is wrong?

Even though I am supplying 5V input, it is displaying 1.1V.

Thank you.

 

  • 0
    Prodigy 250 points
    Hello,

    Re-modelling my above issue, while checking the efficiency of the transmitter, I wanted to calculate the Power input provided to TX and Power output obtained at the RX today. In this process, I arranged the setup with voltmeter and ammeter at both TX and RX end. I found some abnormal behavior of RX module i.e., tripping current after 200mA. In order to fix this, I started to follow, Receiver EVM datasheet test procedure, but this process made the transmitter EVM trip at the supply voltage of 19V.

    Expecting a quick reply soon.

    Best Regards,
    Srujana Patel.
  • 0 in reply to Srujana Patel
    TI__Guru* 75656 points
    Hi
    The bq500212A EVM (PWR550)is a 5V input transmitter and input voltage is recommended to be between 4.5V and 5.5V. We also have 12V(PWR584,PWR648,PWR629) ) and 19V(PWR758, HPA688) input transmitters.
    The bq51003 Users Guide call out the HPA688 or equivalent and describes the set up with HPA688 a 19V input unit.

    If you have applied 19V to the input of bq500212A it will has suffered extensive damage and would be difficult to repair.

    The bq51003 can be evaluated with any number of Qi transmitters available on the market.
  • 0 in reply to Bill Johns
    Prodigy 250 points

    Hello Mr. Johns,

    Is there any slight possibility that the board can be repaired or replaced with another one? Becuase being a student, I am afraid if I can afford a new one.

    Also, if I change the transmitter coil to 760308101103 as suggested by you, what would its influence be on the receiver coil  i.e., Ls'? I observed the Ls' value with the test fixture specified in the datasheet for ETW-00032W coil. This coil is of 44 OD and 6.5uH Ls. So, would the reading with 760308101103 be the same due to almost same inductance or vary due to the size of the coil? If its the same, then the receiver coil designed would work with any transmitter with A11 design in the market right?

    I also observed that the current was tripping after reaching an amount of around 200mA at the receiver end. The diode shows fault condition. This happened with the transmitter BQ500212A EVM and BQ51003 EVM combination. why is this irregular scenario taking place?

    Thank you.