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BQ7718

ACTIVE

Family 2-5S Overvoltage Protector with Internal Delay Timer

Product details

Function Protection Number of series cells (min) 2, 3, 4, 5 Number of series cells (max) 3, 4, 5 Features Overvoltage, Single pin output drive, Stackable Operating current (typ) (µA) 1 Rating Catalog Vin (max) (V) 25 TI functional safety category Functional Safety-Capable Overvoltage protection 3.85, 3.95, 4.2, 4.225, 4.275, 4.3, 4.35, 4.45 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 3.85 Battery overvoltage protection (max) (V) 4.65
Function Protection Number of series cells (min) 2, 3, 4, 5 Number of series cells (max) 3, 4, 5 Features Overvoltage, Single pin output drive, Stackable Operating current (typ) (µA) 1 Rating Catalog Vin (max) (V) 25 TI functional safety category Functional Safety-Capable Overvoltage protection 3.85, 3.95, 4.2, 4.225, 4.275, 4.3, 4.35, 4.45 Operating temperature range (°C) -40 to 110 Battery overvoltage protection (min) (V) 3.85 Battery overvoltage protection (max) (V) 4.65
WSON (DPJ) 8 12 mm² 4 x 3
  • 2-, 3-, 4-, and 5-series cell overvoltage protection
  • Internal delay timer
  • Fixed OVP threshold
  • High-accuracy overvoltage protection: ± 10 mV
  • Low power consumption ICC ≈ 1 µA (VCELL(ALL) < VPROTECT)
  • Low leakage current per cell input < 100 nA
  • Functional Safety-Capable
  • Package footprint options:
    • Small 8-pin QFN (3.00 mm × 4.00 mm)
    • Leaded 8-pin MSOP (3.00 mm × 5.00 mm, including leads)
  • 2-, 3-, 4-, and 5-series cell overvoltage protection
  • Internal delay timer
  • Fixed OVP threshold
  • High-accuracy overvoltage protection: ± 10 mV
  • Low power consumption ICC ≈ 1 µA (VCELL(ALL) < VPROTECT)
  • Low leakage current per cell input < 100 nA
  • Functional Safety-Capable
  • Package footprint options:
    • Small 8-pin QFN (3.00 mm × 4.00 mm)
    • Leaded 8-pin MSOP (3.00 mm × 5.00 mm, including leads)

The BQ7718xy family of products provides an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition. For quicker production-line testing, the BQ7718xy device provides a Customer Test Mode (CTM) with greatly reduced delay time.

In the BQ7718xy device, an internal delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, the output is triggered into its active state (either high or low depending on the configuration).

The BQ7718xy family of products provides an overvoltage monitor and protector for Li-Ion battery pack systems. Each cell is monitored independently for an overvoltage condition. For quicker production-line testing, the BQ7718xy device provides a Customer Test Mode (CTM) with greatly reduced delay time.

In the BQ7718xy device, an internal delay timer is initiated upon detection of an overvoltage condition on any cell. Upon expiration of the delay timer, the output is triggered into its active state (either high or low depending on the configuration).

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Design & development

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

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Evaluation board

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User guide: PDF
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Reference designs

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Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00108 — Stacked Overvoltage Battery Protector Reference Design

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Design guide: PDF
Schematic: PDF
Package Pins Download
WSON (DPJ) 8 View options

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