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bq29209-Q1

Texas Instruments
Part Number bq29209-Q1
Manufacturer Texas Instruments
Description Voltage Protection
Published Jan 4, 2020
Detailed Description Product Folder Order Now Technical Documents Tools & Software Support & Community BQ29209-Q1 SLUSC62C – JUNE 2015 –...
Datasheet PDF File bq29209-Q1 PDF File

bq29209-Q1
bq29209-Q1


Overview
Product Folder Order Now Technical Documents Tools & Software Support & Community BQ29209-Q1 SLUSC62C – JUNE 2015 – REVISED MAY 2019 BQ29209-Q1 Voltage Protection with Automatic Cell Balance for 2-Series Cell Li-Ion Batteries 1 Features •1 2-series cell secondary protection • Automatic cell imbalance correction with external enable control – ±30-mV enable, 0-mV disable thresholds typical • External capacitor-controlled delay timer • External resistor-controlled cell balance current • Low power consumption ICC < 3 µA typical (VCELL(ALL) < VPROTECT) • Internal cell balancing handles current up to 15 mA • External cell balancing mode supported • High-accuracy overvoltage protection: – ±25 mV with TA = 0°C to 60°C • Fixed overvoltage protection threshold: 4.
30 V • Small 8L DRB package • Automotive-qualified AEC Q100 grade two 2 Applications • 2nd level protection in li-ion battery packs – Emergency call (eCall) – Netbook computers – Power tools – Portable equipment and instrumentation – Battery backup systems 3 Description The BQ29209-Q1 device is a secondary overvoltage protection IC for 2-series cell lithium-ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit and automatic cell imbalance correction.
The voltage of each cell in a 2-series cell battery pack is compared to a factory programmed internal reference voltage.
If either cell reaches an overvoltage condition, the OUT pin changes from low to high state.
The BQ29209-Q1 can perform automatic voltagebased cell imbalance correction.
Balancing can start when the cell voltages are different by nominally 30 mV or more and stops when the difference is nominally 0 mV.
Cell balancing is enabled and disabled by the CB_EN pin.
Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) BQ29209-Q1 VSON (8) 3.
00 mm × 3.
00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic PACK+ CELL2 CELL1 RIN2 RIN1 RCBext 1...


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