BQ2946 Texas instruments

BQ2946

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BQ2946

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Описание

The BQ2946xx family of products is a secondary-level overvoltage monitor and protector for Li-Ion battery pack systems. The cell is monitored for overvoltage condition and triggers an internal counter once the OVP threshold is exceeded; after a fixed set delay, the out is transitioned to a high level. The output is reset (goes low) if the cell voltage drops below the set threshold minus the hysteresis.

Single-Cell Overvoltage Monitor for Secondary Protection
Fixed Programmable Delay Timer
Fixed Overvoltage Protection (OVP) Threshold
- Available Range of 3.85 V to 4.6 V
Fixed OVP Delay Option: 4 s or 6.5 s
High-Accuracy OVP: ± 10 mV
Low Power Consumption I_CC ≈ 1 µA (V_CELL(ALL) < V_PROTECT)
Low Leakage Current per Cell Input < 100 nA
Small Package Footprint
- 6-Pin SON

Function	Protection
Number of series cells (min)	1
Number of series cells (max)	1
Features	Overvoltage, Single pin output drive
Operating current (typ) (µA)	1
Rating	Catalog
Vin (max) (V)	8
Overvoltage protection	4.225, 4.35, 4.45
Operating temperature range (°C)	-40 to 110
Battery overvoltage protection (min) (V)	3.85
Battery overvoltage protection (max) (V)	4.6