BQ7790400PW
ActiveIC BATT PROT LI-ION 3-4C 20TSSOP
BQ7790400PW
ActiveIC BATT PROT LI-ION 3-4C 20TSSOP
Description
General part information
BQ77904 Series
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.
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.
Technical Specifications
Parameters and characteristics for this part
| Specification | BQ7790400PW |
|---|---|
| Battery Chemistry | Lithium Ion |
| Fault Protection | Over Current, Over Temperature, Over/Under Voltage |
| Function | Battery Protection |
| Mounting Type | Surface Mount |
| Number of Cells (Max) | 4 |
| Number of Cells (Min) | 3 |
| Operating Temperature (Max) | 85 °C |
| Operating Temperature (Min) | -40 °C |
| Package Length | 0.173 in |
| Package Name | 20-TSSOP |
| Package Width | 4.4 mm |
Pricing
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