I have been working with the BQ51050B, and we have come up against an issue. The batteries are small... 240mAh, and we are charging them at 0.5C. The TERM signal is completely disconnected from anything else in the system, so there should not be any charge termination detected according to both the datasheet and another forum thread. However, I am still seeing a EPT01 message coming from the BQ51050B to the NXP NXQ1TXH5 wireless power transmitter. Making matters worse, it appears as if the signal at RECT goes away, indicating to the system that the device is no longer on the charger, although it actually is. We we hoping to continuously detect the existance of connection to the wireless charger. EPT01 terminates the connection to the NXQ1TXH5. Under what other conditions is EPT01 sent?
Using the NXP debugger, I receive the following messages:
127 state charged
5183 qidata 02 01 03
10251 qidata 02 01 03
20387 qidata 02 01 03
25455 qidata 02 01 03
40659 qidata 02 01 03
45727 qidata 02 01 03
60931 qidata 02 01 03
65999 qidata 02 01 03
81203 qidata 02 01 03
86271 qidata 02 01 03
version
86271 dbg NXQ1TXH5 N1F refkit Debug tool v1.1.0
86271 dbg DSP FW revision 2.5.2
86271 chipid NXQ1TXH5
86271 state transfer
86271 dbg LED mode: 11
86271 dbg fod thr: 332
86271 dbg fod e: 276
86271 dbg cur limit: 2000
86271 dbg vbat limit: 4200
86271 dbg ping duty: 50
86271 dbg ping freq: 175000
86271 dbg ping cur: 0
86271 dbg pwm min freq: 110000
86271 dbg options: 0x000882
96407 qidata 02 01 03
101475 qidata 02 01 03
106543 qidata 02 01 03
116679 qidata 02 01 03
121747 qidata 02 01 03
136951 qidata 02 01 03
