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BQ77207

ACTIVE

3-series to 7-series cell Li-ion battery, internal delay timer, voltage and temperature protector

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Data sheet

BQ77207

ACTIVE
Data sheet Order now

Product details

Function Protection Number of series cells (min) 3, 4, 5, 6 Number of series cells (max) 4, 5, 6, 7 Features FET drive, Open wire (OW), Over-temperature (OT), Overvoltage, Stackable, Undervoltage Operating current (typ) (µA) 1 Rating Catalog Vin (max) (V) 38.5 TI functional safety category Functional Safety-Capable Overvoltage protection 4.275, 4.325 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 4.325 Battery overvoltage protection (max) (V) 4.325
Function Protection Number of series cells (min) 3, 4, 5, 6 Number of series cells (max) 4, 5, 6, 7 Features FET drive, Open wire (OW), Over-temperature (OT), Overvoltage, Stackable, Undervoltage Operating current (typ) (µA) 1 Rating Catalog Vin (max) (V) 38.5 TI functional safety category Functional Safety-Capable Overvoltage protection 4.275, 4.325 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 4.325 Battery overvoltage protection (max) (V) 4.325
WSON (DSS) 12 6 mm² 3 x 2
  • 3-series cell to 7-series cell protection
  • High-accuracy overvoltage protection
    • ± 10 mV at 25°C
    • ± 20 mV from 0°C to 60°C
  • Overvoltage protection options from 3.55 V to 5.1 V
  • Undervoltage protection with options from 1.0 V to 3.5 V
  • Open-wire connection detection
  • Overtemperature protection using NTC or PTC
  • Random cell connection
  • Functional safety-capable
  • Fixed internal delay timers
  • Fixed detections thresholds
  • Fixed output drive type for each of COUT and DOUT
    • Active high or active low
    • Active high drive to 6 V
    • Open drain with ability to be pulled up externally to VDD
  • Low power consumption ICC ≈ 1 µA (VCELL(ALL) < VOV)
  • Low leakage current per cell input < 100 nA with open-wire detection disabled
  • Package footprint option
    • 12-pin WSON with 0.5-mm lead pitch
  • 3-series cell to 7-series cell protection
  • High-accuracy overvoltage protection
    • ± 10 mV at 25°C
    • ± 20 mV from 0°C to 60°C
  • Overvoltage protection options from 3.55 V to 5.1 V
  • Undervoltage protection with options from 1.0 V to 3.5 V
  • Open-wire connection detection
  • Overtemperature protection using NTC or PTC
  • Random cell connection
  • Functional safety-capable
  • Fixed internal delay timers
  • Fixed detections thresholds
  • Fixed output drive type for each of COUT and DOUT
    • Active high or active low
    • Active high drive to 6 V
    • Open drain with ability to be pulled up externally to VDD
  • Low power consumption ICC ≈ 1 µA (VCELL(ALL) < VOV)
  • Low leakage current per cell input < 100 nA with open-wire detection disabled
  • Package footprint option
    • 12-pin WSON with 0.5-mm lead pitch

The BQ77207 family of products provides a range of voltage and temperature monitoring including overvoltage (OVP), undervoltage (UVP), open wire (OW), and overtemperature (OT) protection for Li-ion battery pack systems. Each cell is monitored independently for overvoltage, undervoltage, and open-wire conditions. With the addition of an external NTC or PTC thermistor, the device can detect overtemperature conditions.

In the BQ77207 device, an internal delay timer is initiated upon detection of an overvoltage, undervoltage, open-wire, or overtemperature condition. Upon expiration of the delay timer, the respective output is triggered into its active state (either high or low, depending on the configuration).

The overvoltage triggers the COUT pin if a fault is detected, and undervoltage triggers the DOUT pin if a fault is detected. If an overtemperature or open-wire fault is detected, then both the DOUT and COUT will be triggered. For quicker production-line testing, the BQ77207 device provides a Customer Test Mode (CTM) with greatly reduced delay time.

The BQ77207 family of products provides a range of voltage and temperature monitoring including overvoltage (OVP), undervoltage (UVP), open wire (OW), and overtemperature (OT) protection for Li-ion battery pack systems. Each cell is monitored independently for overvoltage, undervoltage, and open-wire conditions. With the addition of an external NTC or PTC thermistor, the device can detect overtemperature conditions.

In the BQ77207 device, an internal delay timer is initiated upon detection of an overvoltage, undervoltage, open-wire, or overtemperature condition. Upon expiration of the delay timer, the respective output is triggered into its active state (either high or low, depending on the configuration).

The overvoltage triggers the COUT pin if a fault is detected, and undervoltage triggers the DOUT pin if a fault is detected. If an overtemperature or open-wire fault is detected, then both the DOUT and COUT will be triggered. For quicker production-line testing, the BQ77207 device provides a Customer Test Mode (CTM) with greatly reduced delay time.
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Technical documentation

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Type Title Date
* Data sheet BQ77207 Voltage and Temperature Protection for 3-Series to 7-Series Cell Li-Ion Batteries with Internal Delay Timer datasheet (Rev. A) PDF | HTML 28 Jun 2022
Functional safety information BQ77207 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 24 Feb 2022
User guide BQ77207EVM User's Guide 28 Oct 2021
Certificate BQ77207EVM EU RoHS Declaration of Conformity (DoC) 26 Aug 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BQ77207EVM — BQ77207 evaluation module 3-series to 7-series cell Li-ion battery voltage and temperature protector

The BQ77207EVM evaluation module (EVM) is a complete evaluation system for the BQ77207, a 3-series to 7-series cell Li-Ion battery protection integrated circuit.  The circuit module includes one BQ77207 integrated circuit (IC), thermistor, and all other onboard components necessary to signal (...)

User guide: PDF
Not available on TI.com
Reference designs

TIDA-010268 — 5s to 7s battery pack monitor reference design with low-side MOSFET control

This reference design is a high-cell voltage-accuracy 5s to 7s lithium-ion (Li-ion), lithium iron phosphate (LiFePO4) battery pack design. The design monitors each cell voltage, pack current, cell and metal-oxide semiconductor field-effect transistor (MOSFET) temperature with high accuracy and (...)
Design guide: PDF
Package Pins Download
WSON (DSS) 12 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

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