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Circuitos integrados de gestión de baterías
Protectores de baterías

BQ77915

ACTIVO

Protector primario apilable de potencia ultrabaja de las series 3 a 5 con equilibrado autónomo de ce

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BQ77915

ACTIVO
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Detalles del producto

Function Protection Number of series cells (min) 3, 4, 5 Number of series cells (max) 4, 5 Features Cell balancing, FET drive, Open wire (OW), Over-temperature (OT), Overcurrent during charge (OCC), Overcurrent during discharge (OCD), Overvoltage, Short-circuit Discharge (SCD), Stackable, Under-temperature (UT), Undervoltage Operating current (typ) (µA) 8 Rating Catalog Vin (max) (V) 25 TI functional safety category Functional Safety-Capable Overvoltage protection 3.8, 4.2, 4.25, 4.275, 4.3 Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 3 Battery overvoltage protection (max) (V) 4.575
Function Protection Number of series cells (min) 3, 4, 5 Number of series cells (max) 4, 5 Features Cell balancing, FET drive, Open wire (OW), Over-temperature (OT), Overcurrent during charge (OCC), Overcurrent during discharge (OCD), Overvoltage, Short-circuit Discharge (SCD), Stackable, Under-temperature (UT), Undervoltage Operating current (typ) (µA) 8 Rating Catalog Vin (max) (V) 25 TI functional safety category Functional Safety-Capable Overvoltage protection 3.8, 4.2, 4.25, 4.275, 4.3 Operating temperature range (°C) -40 to 85 Battery overvoltage protection (min) (V) 3 Battery overvoltage protection (max) (V) 4.575
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4
  • Ultra-low quiescent current: 8 µA typ. (NORMAL mode), 2 µA (HIBERNATE mode)
  • Full suite of voltage, current, and temperature protections
  • Smart passive cell balancing removes cell-to-cell imbalance
  • Scalable cell count from 3 series to 20 series or more
  • Voltage protection (accuracy ±10 mV for OV, ±18 mV for UV)
    • Overvoltage: 3 V to 4.575 V
    • Undervoltage: 1.2 V to 3 V
  • Open cell and open-wire detection (OW)
  • Current protection
    • Overcurrent discharge 1: –10 mV to –85 mV
    • Overcurrent discharge 2: –20 mV to –170 mV
    • Short-circuit discharge: –40 mV to –340 mV
  • Temperature protection
    • Overtemperature charge: 45°C or 50°C
    • Overtemperature discharge: 65°C or 70°C
  • Additional features:
    • Independent charge (CHG) and discharge (DSG) FET drivers
    • Smart cell balancing algorithm with integrated FETs (up to 50-mA balancing current), also supports external FETs for higher cell-balancing current
    • Ultra-low power HIBERNATE mode
    • High 36-V absolute maximum rating per cell input
    • Resistor programmable overcurrent (OCD1/2) delay
  • SHUTDOWN mode: 0.5-µA maximum
  • Functional Safety-Capable
  • Ultra-low quiescent current: 8 µA typ. (NORMAL mode), 2 µA (HIBERNATE mode)
  • Full suite of voltage, current, and temperature protections
  • Smart passive cell balancing removes cell-to-cell imbalance
  • Scalable cell count from 3 series to 20 series or more
  • Voltage protection (accuracy ±10 mV for OV, ±18 mV for UV)
    • Overvoltage: 3 V to 4.575 V
    • Undervoltage: 1.2 V to 3 V
  • Open cell and open-wire detection (OW)
  • Current protection
    • Overcurrent discharge 1: –10 mV to –85 mV
    • Overcurrent discharge 2: –20 mV to –170 mV
    • Short-circuit discharge: –40 mV to –340 mV
  • Temperature protection
    • Overtemperature charge: 45°C or 50°C
    • Overtemperature discharge: 65°C or 70°C
  • Additional features:
    • Independent charge (CHG) and discharge (DSG) FET drivers
    • Smart cell balancing algorithm with integrated FETs (up to 50-mA balancing current), also supports external FETs for higher cell-balancing current
    • Ultra-low power HIBERNATE mode
    • High 36-V absolute maximum rating per cell input
    • Resistor programmable overcurrent (OCD1/2) delay
  • SHUTDOWN mode: 0.5-µA maximum
  • Functional Safety-Capable

The BQ77915 device is a low-power battery pack protector that implements a suite of voltage, current, and temperature protections and a smart cell balancing algorithm 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) provide additional flexibility.

The BQ77915 device is a low-power battery pack protector that implements a suite of voltage, current, and temperature protections and a smart cell balancing algorithm 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) provide additional flexibility.
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Documentación técnica

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* Data sheet BQ77915 3-Series to 5-Series Stackable Ultra-Low Power Primary Protector with Autonomous Cell Balancing and HIBERNATE Mode datasheet (Rev. L) PDF | HTML 21 ago 2023
Technical article Pack a punch in battery pack systems with low-cost MCUs PDF | HTML 16 nov 2021
Functional safety information BQ77915 Function Safety Capable PDF | HTML 07 sep 2020
Application note Stacking Implementations with bq77915 (Rev. A) PDF | HTML 27 ago 2020
E-book E-book: An engineer’s guide to industrial robot designs 12 feb 2020
EVM User's guide bq77915 3-Series to 5-Series Low-Power Protector Evaluation Module User's Guide (Rev. B) 21 ago 2018
Application note High Side Charge FET Implementation 23 jul 2018
Application note Bq77905 Using Multiple FETs 15 jul 2016
Application note bq77905 Separate Current Paths (Rev. A) 07 jul 2016

Diseño y desarrollo

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.

Placa de evaluación

BQ77915EVM-014 — Módulo de evaluación de protector primario apilable de potencia ultrabaja de serie 3 a 5 BQ77915

The BQ77915EVM-014 evaluation module (EVM) is a complete evaluation system for the BQ77915 3-series to 5-series low-power protector for lithium-ion cells. The EVM includes one BQ77915 and FETs to control current in a configuration typical for switching current in a lithium-ion battery pack. (...)

Guía del usuario: PDF
No disponible en TI.com
Diseños de referencia

PMP40441 — Diseño de referencia de sistema de cargador de batería reductor-elevador de varias celdas para PPS U

This reference design is for USB Power Delivery (PD) battery charging applications, such as power banks or other portable devices. It employs the Buck-Boost charger BQ25713 for a wide input and output range for USB PD charging. The USB PD controller card (PMP40442) can configure the charger to run (...)
Test report: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
TSSOP (PW) 24 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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Soporte y capacitación

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