BQ294502 Datasheet, PDF (1/18 Pages) Texas Instruments – Overvoltage Protection for 2-Series and 3-Series Cell Li-Ion Batteries

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bq294502, bq294504, bq294512, bq294515
bq294522, bq294524, bq294532, bq294562
bq294572, bq294582, bq294592
SLUSAJ3C – SEPTEMBER 2011 – REVISED MAY 2012
Overvoltage Protection for 2-Series and 3-Series Cell Li-Ion Batteries
Check for
Samples: bq294502, bq294504, bq294512, bq294515, bq294522, bq294524, bq294532, bq294562, bq294572, bq294582, bq294592
FEATURES
1
• 2-Series and 3-Series Cell Monitor for
Secondary Protection
• Fixed Programmable Delay Timer
• Fixed OVP Threshold:
– bq294502 = 4.35 V with 4-s Delay Timer
– bq294504 = 4.35 V with 6.5-s Delay Timer
– bq294512 = 4.40 V with 4-s Delay Timer
– bq294515 = 4.425 V with 4-s Delay Timer
– bq294522 = 4.45 V with 4-s Delay Timer
– bq294524 = 4.45 V with 6.5-s Delay Timer
– bq294532 = 4.50 V with 4-s Delay Timer
– bq294562 = 4.25 V with 4-s Delay Timer
– bq294572 = 4.00 V with 4-s Delay Timer
– bq294582 = 4.225 V with 4-s Delay Timer
– bq294584 = 4.225 V with 6.5-s Delay Timer
– bq294592 = 4.30 V with 4-s Delay Timer
• 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
– 6-pin SON
APPLICATIONS
• 2^nd-Level Protection in Li-Ion Battery Packs in:
– Tablets
– Slates
– Power Tools
– Notebook Computers
– Portable Equipment and Instrumentation
DESCRIPTION
The bq2945xy family of products is a secondary level voltage monitor and protector for Li-Ion battery pack
systems. Each cell is monitored independently for an overvoltage condition. Based on the configuration, an
output is triggered after a fixed delay if any one of the two or three cells has an overvoltage condition. This output
will be triggered into a high state after an overvoltage condition has satisfied the specified delay timer.
DRV Package
(Top View)
V3 1
V2 2
VSS 3
PWR PAD
6 OUT
5 VDD
4 V1
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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