JAJSSD2A October 2023 – December 2023 BQ25638
PRODUCTION DATA
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The sleep comparator is used to suspend the converter if the adapter voltage is insufficient to maintain buck converter operation while charging the battery. If VVBUS falls below VBAT + VSLEEP the converter stops switching, the PG pin transitions high. If VVBUS rises back above VBAT + VSLEEPZ, the converter restarts, the PG pin transitions low.
If VVBUS falls below VPOORSRC, the converter stops switching and the PG pin transitions high (if not already suspended and high due to the sleep comparator), and the VBUS_STAT transitions to 000 and the device transitions to battery-only mode. If VVBUS rises above VPOORSRC, it is a new adapter attach, and poor source qualification will be run. VBUS_STAT and the PG pin state will be determined by the adapter attach sequence as outlined in Section 7.3.3.