BQ7790502PW Part Information

Details for BQ7790502PW by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Battery Management

Part Description

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 S to 20 S 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 via 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 S 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 reduced component count, all protection faults use internal delay timers.

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Part Features

  • Additional Features u2013 Independent Charge (CHG) and Discharge (DSG) FET Drivers u2013 36-V Absolute Maximum Rating Per Cell Input u2013 Built-In-Self-Test Functions For High Reliability
  • Current Protection u2013 Overcurrent Discharge 1: u201310 mV to u201385 mV u2013 Overcurrent Discharge 2: u201320 mV to 170 mV u2013 Short Circuit Discharge: u201340 mV to 340 mV u2013 Accuracy u00b120% for u2264 20 mV, u00b130% for > 20 mV across full temperature
  • Full suite of voltage, current and temperature protections
  • Normal Mode: 6 u00b5A (bq77904/bq77905)
  • Open Cell and Open Wire Detection (OW)
  • Scalable cell count from 3 S to 20 S or more
  • Shutdown Mode: 0.5 u00b5A Maximum
  • Temperature Protection u2013 Overtemperature Charge: 45u00b0C or 50u00b0C u2013 Overtemperature Discharge: 65u00b0C or 70u00b0C u2013 Undertemperature Charge: u20135u00b0C or 0u00b0C u2013 Undertemperature Discharge: u201320u00b0C or u201310u00b0C
  • Voltage Protection (Accuracy u00b110 mV) u2013 Overvoltage: 3 V to 4.575 V u2013 Undervoltage: 1.2 V to 3 V

Part Specifications

Battery Type Li-Ion Li-Pol
Battery Protection Over Current Over / Under Voltage Over / Under Temperature Short Circuit Open Wire Detection
No. of Batteries 5
Shutdown Current 0.5µA
Battery IC Case Style TSSOP
No. of Pins 20Pins
Supply Voltage Min 3V
Supply Voltage Max 25V
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant Yes
MSL MSL 2 - 1 year
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • 3- to 5-series li-ion and li-phosphate ultra-low-power stackable battery protector | Texas Instruments

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