BQ27750 Datasheet, PDF (2/34 Pages) Texas Instruments – Impedance Track Battery Gas Gauge and Protection Solution for 1-Series Cell Li-Ion Battery Packs

bq27750
SLUSCM7 – JUNE 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings ............................................................ 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Supply Current .......................................................... 5
6.6 Power Supply Control ............................................... 5
6.7 Low-Voltage General Purpose I/O, TS1 ................... 5
6.8 Power-On Reset (POR) ............................................ 6
6.9 Internal 1.8-V LDO ................................................... 6
6.10 Current Wake Comparator...................................... 6
6.11 Coulomb Counter .................................................... 6
6.12 ADC Digital Filter .................................................... 7
6.13 ADC Multiplexer ...................................................... 7
6.14 Internal Temperature Sensor .................................. 7
6.15 NTC Thermistor Measurement Support.................. 7
6.16 High-Frequency Oscillator....................................... 8
6.17 Low-Frequency Oscillator ....................................... 8
6.18 Voltage Reference 1 ............................................... 8
6.19 Voltage Reference 2 ............................................... 8
6.20 Instruction Flash...................................................... 8
6.21 Data Flash............................................................... 9
6.22 Current Protection Thresholds ................................ 9
6.23 Current Protection Timing ..................................... 10
6.24 N-CH FET Drive (CHG, DSG)............................... 10
6.25 I²C Interface I/O .................................................... 11
6.26 I²C Interface Timing .............................................. 11
6.27 Typical Characteristics ......................................... 12
7 Detailed Description ............................................ 15
7.1 Overview ................................................................. 15
7.2 Functional Block Diagram ....................................... 15
7.3 Feature Description................................................. 16
7.4 Device Functional Modes........................................ 20
8 Application and Implementation ........................ 21
8.1 Application Information............................................ 21
8.2 Typical Applications ............................................... 21
9 Power Supply Requirements .............................. 23
10 Layout................................................................... 24
10.1 Layout Guidelines ................................................. 24
10.2 Layout Example .................................................... 25
11 Device and Documentation Support ................. 26
11.1 Documentation Support ........................................ 26
11.2 Trademarks ........................................................... 26
11.3 Electrostatic Discharge Caution ............................ 26
11.4 Glossary ................................................................ 26
12 Mechanical, Packaging, and Orderable
Information Information ...................................... 26
4 Revision History
DATE
June 2017
REVISION
*
NOTES
Initial Release
2
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