I am working on a wireless power Transmitter (wireless charger) P9243-GB,
the P9243-GB via GIPO_B7, generates a PWM signal and controls the feedback pin of the step-down regulator, so I would like to know more in detail about how this affects the voltage on the feedback pin and between what ranges the output of this DC/DC change?
my intention is to use wireless charging and to be compatible with iphone at 7.5W
This is a PWM signal, which changes the FB voltage through RC filtering
P9243-GB is a constant frequency and voltage regulation system. When RX needs higher power,
The voltage will be adjusted upward to achieve higher power
The voltage output range depends on the actual application, including power level or TX/RX shift of center.
7.5W is about 5. XV ~ 7. XV,
Thanks for your answer,
So what other DC/DC do you recommend to replace the current one? (this is due to stock)
Could you please tell me your basic requirements? Such as input voltage, etc.
Input voltage is: 9V-19V
The output V@I is the one necessary to be compatible with Apple 7.5W
My concern is how the PWM signal works when DC/DC is different, since the FB pin reference may change etc.