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TI BQ7790400PW

Manufacturer
TI
MPN
BQ7790400PW
LCSC Part #
C132059
Packaging
TSSOP-20
Customer #
Key Attributes
bq77905, bq77904 3 - 5 Cell Ultra-Low Power Voltage, Current, Temperature and Open-Circuit Stackable Lithium-Ion Battery Protector
DatasheetTI BQ7790400PW
RoHS Compliance2 documents available
Alternative Parts1
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement

Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Battery Management
ManufacturerTI
PackagingTSSOP-20
Operating Temperature-40℃~+85℃
Interface-
Quiescent Current6uA
0V Battery ChargeNot supported
Operating Voltage3V~25V
Type of BatteryLithium Battery
FeaturesOvercharge protection;Over-discharge protection;Overcurrent Protection;Short-Circuit Protection;Battery temperature monitoring
The Chip TypeProtection IC
Balance Current-
Charge Current - Max-
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Introduction

AI Translation

The bq77904 and bq77905 devices are low-power battery pack protectors that can implement a series of voltage, current, and temperature protections without the need for microcontroller (MCU) control. The stackable interface of these devices allows for easy expansion to support applications with 3S to 20S or more battery cells. The protection thresholds and delays are factory-programmed, and there are multiple configurations available. To enhance flexibility, separate over-temperature and under-temperature discharge thresholds (OTD and UTD) as well as over-temperature and under-temperature charge thresholds (OTC and UTC) are provided. These devices can achieve battery pack protection through the integrated independent CHG and DSG low-side NMOSFET drivers, which can be disabled via two control pins. These control pins can also provide a battery protection solution for more series-connected batteries (more than 6S) in a simple and cost-effective manner. To do this, simply cascade the CHG and DSG outputs of the upper-level device to the control pins of the lower-level device. To reduce the number of components, an internal delay timer is used for all protection faults.

Features

AI Translation
  • Normal mode: 6μA (bq77904/bq77905)
  • Complete voltage, current, and temperature protection scalable from 3S to 20S cells or more
  • Voltage protection (±10mV accuracy)
  • Overvoltage: 3V to 4.575V
  • Undervoltage: 1.2V to 3V
  • Open-wire detection (OW)
  • Current protection
  • Overcurrent discharge 1: -10mV to -85mV
  • Overcurrent discharge 2: -20mV to 170mV
  • Short-circuit discharge: -40mV to 340mV
  • Accuracy of ±20% for voltage ≤20mV and ±30% for voltage >20mV over the full temperature range
  • Temperature protection
  • Overtemperature charging: 45°C or 50°C
  • Overtemperature discharging: 65°C or 70°C
  • Undertemperature charging: -5°C or 0°C
  • Undertemperature discharging: -20°C or -10°C
  • Separate CHG and DSG FET drivers
  • 36V absolute maximum rating per cell input
  • Built-in self-test for high reliability
  • Shutdown mode: 0.5μA maximum

Applications

AI Translation
  • Power tools
  • Garden tool start/stop battery packs
  • Lead-acid (PbA) backup batteries
  • Light electric vehicles
  • Energy storage systems, uninterruptible power supplies (UPS)
  • 10.8V to 72V battery packs