TI E2E Community
Wireless Power Forum
bq51013EVM-725 unable to work with transmitters
Currently I am testing on the new generation of wireless power transfer kits: bq51013EVM-725 & bq500210EVM-689. Previously I tested on gen 1 (bq25046evm&bq500110evm) also.
When I tested on the new two kits (bq51013EVM-725 & bq500210EVM-689), I have set input power of 19V, 0.5A max to the transmitter, the LED D5 showed green color, but when I placed the receiver on top of the transmitter, buzzer sounded but the LED D5 turned to Red color, and the power did not start to transfer.
Since I have generation one kits too, so I tried different combinations with these two sets of transceivers, the receiver bq51013EVM-725 did not work with either two transmitters.
So what could be the reason of this problem? Please verify and reply me asap.
Sorry you are having problems with the Gen2 kit along with the Gen1 kit.
Could you look at the 19V input to the transmitter EVM. Verify that it is solid with now dips, voltage must be 19V +/- 1V.
Some customers have had problem with input power supplies entering current limit during load transitions.
Bill Johns, Applications Engineer
bqTESLA Wireless Power Products
Texas Instruments Inc
I have tested the input voltage supply with scope.
The result is:
1. Average high and low are both 18.5V
2. Max high is 19V, and min low is 17.9V
So I think the input voltage supply should be stable. And the thing is I have tested the two generations of transceiver kits with different combinations, the problem happened only when I use the bq51013evm-725 receiver, it can not work with both gen1 and gen2 transmitter. However, the both gen1 and gen2 transmitter can work with gen1 receiver.
Please verify and thank you.
Ps. this is not the new set you sended to me.
Input voltage sounds reasonable, to be on the safe side set current limit to greater than 1.0A.
Double check the jumper settings on bq51013EVM-725.
Finally solved, the JP3---TS did not connect to DIS. After connecting them, the receiver works.
I have received all your new kits, and I will try out later, hopefully could get positive results.
Thank you !
JP3 controls the external temp sense option of the bq51013. With shorting jumper in the DIS position a fixed resistor is use to set value of the TS pin to a safe value with no input or connection to J5, TS connection. With shorting jumper in the EN positions an external NTC thermistor connected to J5 is used to monitor temp and generate a shutdown incase of fault. See User’s Guide for additional info.
Default or safe jumper settings are marked with a small dot between the two pins on the pcb.
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