ZHCSDX5C July 2015 – October 2022 BQ25895M
PRODUCTION DATA
The device includes a battery monitor to provide measurements of VBUS voltage, battery voltage, system voltage, thermistor ratio, and charging current, and charging current based on the device modes of operation. The measurements are reported in Battery Monitor Registers (REG0E-REG12). The battery monitor can be configured as two conversion modes by using CONV_RATE bit: one-shot conversion (default) and 1 second continuous conversion.
For one-shot conversion (CONV_RATE = 0), the CONV_START bit can be set to start the conversion. During the conversion, the CONV_START is set and it is cleared by the device when conversion is completed. The conversion result is ready after tCONV (maximum 1 second).
For continuous conversion (CONV_RATE = 1), the CONV_RATE bit can be set to initiate the conversion. During active conversion, the CONV_START is set to indicate conversion is in progress. The battery monitor provides conversion result every 1 second automatically. The battery monitor exits continuous conversion mode when CONV_RATE is cleared.
When battery monitor is active, the REGN power is enabled and can increase device quiescent current. In battery only mode, the battery monitor is only active when V(BAT) > SYS_MIN setting in REG03.
| PARAMETER | REGISTER | MODES OF OPERATION | |||
|---|---|---|---|---|---|
| CHARGE MODE | BOOST MODE | DISABLE CHARGE MODE | BATTERY ONLY MODE | ||
| Battery Voltage (VBAT) | REG0E | Yes | Yes | Yes | Yes |
| System Voltage (VSYS) | REG0F | Yes | Yes | Yes | Yes |
| Temperature (TS) Voltage (VTS) | REG10 | Yes | Yes | Yes | Yes |
| VBUS Voltage (VVBUS) | REG11 | Yes | Yes | Yes | NA |
| Charge Current (IBAT) | REG12 | Yes | NA | NA | NA |