BQ771808 Datasheet, PDF (1/19 Pages) Texas Instruments – Overvoltage Protection for 2-Series to 5-Series Cell Li-Ion Batteries with Internal Delay Timer

bq771800, bq771801, bq771802
bq771803, bq771808, bq771809
www.ti.com
SLUSAX1B – DECEMBER 2012 – REVISED OCTOBER 2013
Overvoltage Protection for 2-Series to 5-Series Cell Li-Ion Batteries
with Internal Delay Timer
Check for Samples: bq771800, bq771801, bq771802, bq771803, bq771808, bq771809
FEATURES
1
• 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
• Small Package Footprint
– 8-pin QFN (3 mm × 4 mm)
APPLICATIONS
• Protection in Li-Ion Battery Packs in:
– Power Tools
– UPS Battery Backup
– Light Electric Vehicles (eBike, eScooter,
Pedal Assist Bicycles)
DESCRIPTION
The bq7718xy family of products is an overvoltage monitor and protector for Li-Ion battery pack systems. Each
cell is monitored independently for an overvoltage condition.
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). For quicker production-line testing, the bq7718xy device provides a Customer Test Mode with
greatly reduced delay time.
VDD 1
V5 2
V4 3
V3 4
8 OUT
7 VSS
6 V1
5 V2
Figure 1. bq771800 Pinout
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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