The BQ77904 and BQ77905 devices are low-power battery pack protectors that implement a suite of voltage, current, and temperature protections without microcontroller (MCU) control. The device’s stackable interface provides simple scaling to support battery cell applications from 3 series to 20 series or more. Protection thresholds and delays are factory-programmed and available in a variety of configurations. Separate overtemperature and undertemperature thresholds for discharge (OTD and UTD) and charge (OTC and UTC) are provided for added flexibility.
The device achieves pack protection through the integrated independent CHG and DSG low-side NMOS FET drivers, which may be disabled through two control pins. These control pins may also be used to achieve cell protection solutions for higher series (6 series and beyond) in a simple and economical manner. To do this, simply cascade a higher device CHG and DSG outputs to the immediate lower device control pins. For a reduced component count, all protection faults use internal delay timers.
| Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | BQ77904, BQ77905 3-Series to 20-Series Ultra Low-Power Voltage, Current, Temperature, and Open-Wire Stackable Lithium-Ion Battery Protector datasheet (Rev. K) | PDF | HTML | 31 jul 2020 |
| Application note | bq77905 20S Cell Stacking Configuration (Rev. B) | 23 jun 2021 | ||
| Functional safety information | BQ77905 Function Safety Capable | 13 jul 2020 | ||
| E-book | E-book: An engineer’s guide to industrial robot designs | 12 feb 2020 | ||
| Application note | High Side Charge FET Implementation | 23 jul 2018 | ||
| Application note | bq77905 Pin Equivalent Diagrams | 28 nov 2017 | ||
| Application note | bq77905 Shutdown for Current Reduction | 21 jul 2017 | ||
| Application note | BQ77905 Design Considerations in High-Current Applications | 05 dic 2016 | ||
| Application note | Bq77905 Using Multiple FETs | 15 jul 2016 | ||
| Application note | bq77905 Separate Current Paths (Rev. A) | 07 jul 2016 | ||
| User guide | bq77905 3-5S Low-Power Protector Evaluation Module (Rev. A) | 07 jul 2016 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
The bq77905EVM-707 is an evaluation board for the bq77905, low power battery protector IC. The bq77905 IC supports 3-5S battery cell configurations and can be stacked to support comfortably a full stack of 20 series cells. In addition, the bq77905 implements a suite of voltage, current and (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| TSSOP (PW) | 20 | Ultra Librarian |
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