Hi,
Au's HUAWEI USB STICK LTE HWD 12 to the USB port using TPS 2546
When it is inserted, Vbus is turned ON / OFF repeatedly.
The setting pins CTL1, CTL2, CTL3, and ILIM_SEL of the TPS2546 are all set to HIGH and in CDP mode.
I think that TPS 2546 mistakenly recognizes that USB STICK LTE HWD 12 does not conform to USB charging standard BC 1. 2 and that CDP / SDP Auto Switch function repeatedly discharges Vbus.
Are there other factors to discharge?
(HUAWEI USB STICK LTE HWD 12)
Http://www.kddi.com/business/mobile/data/hwd12/spec/
Best Regards,
