Hello,
I'm developing a Qi compliant product (Not getting Qi.) using STWLC38JRM.
Please respond on Operating Frequency and ASK modulation cycle to get back to the testing agency.
[Operating Frequency]
Qi standard defines the operating frequency from 110 kHz to 205 kHz.
Is it possible for STWLC38 to set (limit) operating frequency?
Or does it depend on the settings of the transmitter (e.g. STWBC86)?
The CFG file is provided by the customer, so I don't know the detailed settings.
However, using "STSW-WPSTUDIO V2.2.5",
I have confirmed that "OP FREQ" shows approximately 139 kHz when charging in BPP.
[ASK modulation cycle]
I believe STWLC38 sends an ASK modulated signal towards the transmitter.
It seems that the signal is transmitted from STWLC38 in the digital ping phase,
but how often is it transmitted during charging in BPP?
Isn't it sent at fixed intervals during charging?
I understand that each communication bit of the signal is synchronized
with the cycle of STWLC38's internal 2 kHz clock.
Regards,
Ryoma
