SLUSCU1A May 2017 – May 2018
PRODUCTION DATA.
Usually adapter can supply current higher than DC rating for a few milliseconds to tens of milliseconds. The charger employs two-level input current limit, or peak power mode, to fully utilize the overloading capability and minimize battery discharge during CPU turbo mode. Peak power mode is enabled in REG0x33[5](EN_PKPWR_IDPM) or REG0x33[4](EN_PKPWR_VSYS). The DC current limit, or ILIM1, is the same as adapter DC current, set in REG0x0F/0E(). The overloading current, or ILIM2, is set in REG0x37[7:3], as a percentage of ILIM1.
When the charger detects input current surge and battery discharge due to load transient, it applies ILIM2 for TOVLD in REG0x33[7:6], first, and then ILIM1 for up to TMAX – TOVLD time. TMAX is programmed in REG0x33[1:0]. After TMAX, if the load is still high, another peak power cycle starts. Charging is disabled during TMAX,; once TMAX, expires, charging continues. If TOVLD is programmed higher than TMAX, then peak power mode is always on.