BQ7718 Texas instruments

BQ7718

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BQ7718

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Описание

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).

2-, 3-, 4-, and 5-series cell overvoltage protection
Internal delay timer
Fixed OVP threshold
High-accuracy overvoltage protection: ± 10 mV
Low power consumption I_CC ≈ 1 µA (V_CELL(ALL) < V_PROTECT)
Low leakage current per cell input < 100 nA
Functional Safety-Capable
- Documentation available to aid functional safety system design
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)

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	4.2, 4.225, 4.275, 4.3, 4.35, 4.45
Operating temperature range (°C)	-40 to 110, -40 to 85
Battery overvoltage protection (min) (V)	3.85
Battery overvoltage protection (max) (V)	4.65