The host can start Switched Cap or Bypass
Mode charging follow the steps below:
- Both VBUS and VOUT need to be present.
Host can check the status through VBUSPRESENT_STAT (REG15[2]) and VOUTPRSENT_STAT
(REG15[5]). Both of them need to be '1'.
- Host sets all the protections to the
desired thresholds. Refer to the Device Modes and Protection
Status section for proper setting.
- Host sets either Switched Cap Mode or
Bypass Mode through EN_BYPASS bit (REG0F[3]) based on adapter type.
- Host sets the desired switching
frequency in Switched Cap Mode through FSW_SET [2:0] bits (REG10[7:5]).
- Host sets BUS under current protection
(BUSUCP) to 250 mA though BUSUCP bit (REG05[6])=1
- Host sets charger configuration bits:
CHG_CONFIG_1 (REG05[3])=1.
- Host can enable charge by setting
CHG_EN=1.
- Once charge has been enabled, the
CONV_ACTIVE_STAT bit is set to '1' to indicate either switched cap or bypass is active,
and current starts to flow to the battery.
- When watchdog timer expires, CHG_EN is
reset to '0' and charging stops. Host needs to read or write any register bit before
watchdog expires, or disable watchdog timer (set REG10[2]=1) to prevent watchdog timer
from expiring.