Hello
There are three versions of the BQ51013EVM, called -764, -65, and -725. All are described as exactly the same performance. Why are there three different versions? It would be nice if the differences were described somewhere, to help folks choose between them. Thanks and Best Regards,
-Tim Starr
Tim,
Thanks for the post. Hopefully this helps clear it up. It seems like the main differences between EVMs are packaging and being able to adjust certain features like charge status and Max Iout
764
765
725
WCSP layout
QFM layout
Not sure of package: possibly WCSP
Multifunction NTC and Control Pin for Temperature Monitoring, Done Charging and Fault Host Control
Single NTC/Control Pin for Optimal Safety and I/O Between Host
Programmable Termination Pin for Charge Status 100% (CS100) Support
No mention of Programmable termination Pin
Adjustable resistor R16 can be used to set max output current
No mention of adjustable resistor
Includes these Pins:
JP4 – Pull-Up to Out or Vz
EN1 and EN2 pull-up along with LED D1 can be powered from OUT or RECT. Vz is derived from RECT
through a resistor and zener diode.
4.2.5 JP5 – CS100 TS Enable or Disable
Only used for bq51014 device. This jumper along with R14 and R13 will enable the Charge Status 100%
feature. See data sheet for additional info. Open will disable.
4.2.6 JP6 – ILIM Fix or ADJ
Max output current is set by I-lim pin. In the FIX position current is set to 1.2A max. In the ADJ position
current is set by R16.
Does NOT include: JP4-JP6
Thanks Rachel
That was a good answer...but I have an additional question. Are there any hooks for user dataq to be sent over the wireless comms link? Regards,
-Tim
Bill,
I don't see much on user data for the EVM but here is some info from http://www.ti.com/lit/ds/symlink/bq51013.pdf on the bq51013 part and there is more info on communicatoin in the pdf.
The receiver communicates with the transmitter by changing the load seen by the transmitter. This load variation results in a change in the transmitter coil current, which is measured and interpreted by a processor in the charging pad. The communication is digital - packets are transferred from the receiver to the transmitter. Differential Bi-phase encoding is used for the packets. The bit rate is 2-kbps.
Various types of communication packets have been defined. These include identification and authentication packets, error packets, control packets, end power packets, and power usage packets. The transmitter coil stays powered off most of the time. It occasionally wakes up to see if a receiver is present. When a receiver authenticates itself to the transmitter, the transmiter will remain powered on. The receiver maintains full control over the power transfer using communication packets.
Does this answer your question?
Regards,
Rachel
Bill Johns was able to add additional information regarding your second question, Tim. Here is his answer:
"No—Our bqTESLA products do not support Proprietary Packets at this time, customer specific data over the comm link."
Thanks for your help Bill.
Tim, I hope all the information helps.