SLUSD33A November 2017 – January 2021 BQ25122
PRODUCTION DATA
High Impedance mode is the lowest quiescent current state while operating from the battery. During Hi-Z mode the SYS output is powered by BAT, the MR input is active, and the LSCTRL input is active. All other circuits are in a low power or sleep state.The LS/LDO output can be enabled in Hi-Z mode with the LSCTRL input. If the LS/LDO output has been enabled through I2C prior to entering Hi-Z mode, it will stay enabled. The CD pin is used to put the device in a high-impedance mode when battery is present and VIN < VUVLO. Drive CD high to enable the device and enter active battery operation when VIN is not valid. When the HZ_MODE bit is written by the host, the I2C interface is disabled if only battery is present. To resume I2C, the CD pin must be toggled. If the supply for the CD pull up glitches or experiences a brownout condition , it is recommended to toggle the /CD pin to resume I2C communication.. The functionality of the pin is shown in Table 9-1.
CD, STATE | VIN < VUVLO | VIN > VUVLO |
---|---|---|
L | Hi-Z | Charge Enabled |
H | Active Battery | Charge Disabled |