BQ40Z60_16 Datasheet, PDF (2/47 Pages) Texas Instruments – Programmable Battery Management Unit

bq40z60
SLUSAW3C – DECEMBER 2014 – REVISED JULY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Description (continued)......................................... 2
7 Pin Configuration and Functions ......................... 3
8 Specifications......................................................... 5
8.1 Absolute Maximum Ratings ...................................... 5
8.2 ESD Ratings.............................................................. 5
8.3 Recommended Operating Conditions....................... 5
8.4 Thermal Information .................................................. 6
8.5 Supply Voltage .......................................................... 6
8.6 Supply Current .......................................................... 7
8.7 Power Supply Control ............................................... 7
8.8 Low-Voltage General Purpose I/O (TSx) .................. 7
8.9 High-Voltage General Purpose I/O (ALERT,
SYSPRES) ................................................................. 8
8.10 AFE Power-On Reset ............................................. 8
8.11 Internal 1.8-V LDO ................................................. 8
8.12 Current Wake Comparator...................................... 9
8.13 Coulomb Counter .................................................... 9
8.14 CC Digital Filter....................................................... 9
8.15 ADC......................................................................... 9
8.16 ADC Digital Filter .................................................. 10
8.17 ADC Multiplexer .................................................... 10
8.18 Cell Balancing Support ......................................... 10
8.19 Cell Detach Detection ........................................... 10
8.20 Internal Temperature Sensor ................................ 11
8.21 NTC Thermistor Measurement Support (ADCx) ... 11
8.22 High-Frequency Oscillator..................................... 11
8.23 Low-Frequency Oscillator ..................................... 11
8.24 Voltage Reference 1 ............................................. 11
8.25 Voltage Reference 2 ............................................. 12
8.26 Instruction Flash.................................................... 12
8.27 Data Flash............................................................. 12
8.28 Current Protection Thresholds .............................. 12
8.29 N-CH FET Drive (CHG, DSG)............................... 13
8.30 FUSE Drive (AFEFUSE) ....................................... 14
8.31 Battery Charger Voltage Regulation (VFB)........... 14
8.32 Battery Charger Current Sense (HSRP, HSRN)... 14
8.33 Battery Charger Precharge Current Sense (HSRP,
HSRN)...................................................................... 15
8.34 AC Adapter Fault Detect (HSRN, VCC)................ 15
8.35 Battery Charger Overcurrent Detection (V)_HSRP,
(V)_HSRN..................................................................... 15
8.36 Battery Charger Undercurrent Detection (V)_HSRP,
(V)_HSRN..................................................................... 15
8.37 System Operation Detection (V)_HSRN.................... 15
8.38 Battery Overvoltage Comparator (VFB)................ 15
8.39 Regulator (REGN)................................................. 16
8.40 PWM High-Side Driver (HiDRV) ........................... 16
8.41 PWM Low-Side Driver (LoDRV)............................ 16
8.42 PWM Information .................................................. 16
8.43 Charger Power-Up Sequence ............................... 16
8.44 Thermal Shutdown Comparator............................ 16
8.45 SMBus High Voltage I/O ....................................... 17
8.46 SMBus................................................................... 17
8.47 SMBus XL ............................................................. 17
8.48 Timing Requirements ............................................ 18
8.49 Typical Characteristics ......................................... 18
9 Detailed Description ............................................ 19
9.1 Overview ................................................................. 19
9.2 Functional Block Diagram ....................................... 20
9.3 Feature Description................................................. 21
10 Application and Implementation........................ 30
10.1 Application Information ........................................ 30
10.2 Typical Applications .............................................. 30
11 Power Supply Recommendations ..................... 35
12 Layout................................................................... 36
12.1 Layout Guidelines ................................................. 36
12.2 Layout Example ................................................... 38
13 Device and Documentation Support ................. 39
13.1 Related Documentation......................................... 39
13.2 Community Resources.......................................... 39
13.3 Trademarks ........................................................... 39
13.4 Electrostatic Discharge Caution ............................ 39
13.5 Glossary ................................................................ 39
14 Mechanical, Packaging, and Orderable
Information ........................................................... 39
5 Revision History
Changes from Revision B (April 2015) to Revision C
Page
• Changed Simplified Schematic .............................................................................................................................................. 1
• Added Community Resources ............................................................................................................................................. 39
6 Description (continued)
The device provides an array of battery and system safety functions, including overcurrent in discharge, short
circuit in charge, and short circuit in discharge protection for the battery, as well as FET protection for the N-CH
FETs, internal AFE watchdog, and cell disconnection detection. Through firmware, the device can provide a
larger array of protection features including overvoltage, undervoltage, overtemperature, and more.
2
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