The bq2058t lithium ion pack supervisor is a low cost lithium ion battery pack supervisor that protects and monitors two lithium ion series cells for overvoltage, undervoltage, and monitors pack for overcurrent.
The bq2058T Lithium Ion Pack Supervisor is designed to control the charge and discharge cell voltage limits for two lithium-ion (Li-Ion) series cells, accommodating battery packs containing series/parallel configurations. The device features low operating current and minimal external components, driving external FET switches to manage battery safety.
The supervisor provides protection against overvoltage, undervoltage, and overcurrent conditions. It monitors individual cell voltages and pack current, disabling charging or discharging paths as necessary. The device includes user-configurable delays for overvoltage, undervoltage, and overcurrent events to prevent false triggering.
| Supply current | 12uA typical |
|---|---|
| Sleep current | 0.7uA typical |
| Package | 16-pin 150-mil narrow SOIC |
| Overvoltage threshold (standard) | 4.25V |
| Undervoltage threshold | 2.25V |
| Overcurrent sense voltage (low-side) | 160mV |
| Overcurrent sense voltage (high-side) | 160mV |
| Cell sampling period | 60ms (typical) |
The standard version has an overvoltage threshold of 4.25V.
The DSG output is driven low, disabling the discharge of the pack, and the device enters low-power sleep mode.