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BQ77207
  • BQ77207
  • BQ77207

BQ77207

ACTIVE

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

Texas Instruments BQ77207 Product Info

1 April 2026 3

Parameters

Rating

Catalog

Number of series cells (max)

4, 5, 6, 7

Number of series cells (min)

3, 4, 5, 6

Features

FET drive, Open wire (OW), Over-temperature (OT), Overvoltage, Stackable, Undervoltage

Function

Protection

Operating current (typ) (µA)

1

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

Package

WSON (DSS)-12-6 mm² 3 x 2

Features

  • 3-series cell to 7-series cell protection
  • High-accuracy overvoltage protection
    • ± 10mV at 25°C
    • ± 20mV from 0°C to 60°C
  • Overvoltage protection options from 3.55V to 5.1V
  • Undervoltage protection with options from 1.0V to 3.5V
  • 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 6V
    • Open drain with ability to be pulled up externally to VDD
  • Low power consumption ICC is approximately 1µA (VCELL(ALL) < VOV)
  • Low leakage current per cell input < 100nA with open-wire detection disabled
  • Package footprint option
    • 12-pin WSON with 0.5mm lead pitch
  • 3-series cell to 7-series cell protection
  • High-accuracy overvoltage protection
    • ± 10mV at 25°C
    • ± 20mV from 0°C to 60°C
  • Overvoltage protection options from 3.55V to 5.1V
  • Undervoltage protection with options from 1.0V to 3.5V
  • 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 6V
    • Open drain with ability to be pulled up externally to VDD
  • Low power consumption ICC is approximately 1µA (VCELL(ALL) < VOV)
  • Low leakage current per cell input < 100nA with open-wire detection disabled
  • Package footprint option
    • 12-pin WSON with 0.5mm lead pitch

Description

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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