battery monitor. bq76930 Datasheet

bq76930 monitor. Datasheet pdf. Equivalent

bq76930 Datasheet
Recommendation bq76930 Datasheet
Part bq76930
Description 3-series to 15-series cell battery monitor
Feature bq76930; Product Folder Order Now Technical Documents Tools & Software Support & Community bq76920, bq76.
Manufacture etcTI
Datasheet
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Texas Instruments bq76930
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
bq76920, bq76930, bq76940
SLUSBK2H – OCTOBER 2013 – REVISED MARCH 2019
bq769x0 3-series to 15-series cell battery monitor family
for li-ion and phosphate applications
1 Features
• AFE monitoring features
– Pure digital interface
– Internal ADC measures cell voltage, die
temperature, and external thermistor
– A separate, internal ADC measures pack
current (coulomb counter)
– Directly supports up to three thermistors
(103AT)
• Hardware protection features
– Overcurrent in Discharge (OCD)
– Short Circuit in Discharge (SCD)
– Overvoltage (OV)
– Undervoltage (UV)
– Secondary protector fault detection
• Additional features
– Integrated cell balancing FETs
– Charge, discharge low-side NCH FET drivers
– Alert interrupt to host microcontroller
– 2.5-V or 3.3-V output voltage regulator
– No EEPROM programming necessary
– High supply voltage absolute maximum (up to
108 V)
– Simple I2C compatible interface (CRC option)
– Random cell connection tolerant
2 Applications
• Light electric vehicles (LEV): eBikes, eScooters,
pedelec, and pedal-assist bicycles
• Power tools and garden tools
• Battery backup units (BBUS), energy storage
systems (ESS) and uninterruptible power supply
(UPS) systems
• Wireless base station backup systems
• 12-V, 18-V, 24-V, 36-V, and 48-V industrial battery
packs
1
3 Description
The bq769x0 family of robust analog front-end (AFE)
devices serves as part of a complete pack monitoring
and protection solution for next-generation, high-
power systems, such as light electric vehicles, power
tools, and uninterruptible power supplies. The
bq769x0 is designed with low power in mind: Sub-
blocks within the IC may be enabled or disabled to
control the overall chip current consumption, and a
SHIP mode provides a simple way to put the pack
into an ultra-low power state.
The bq76920 device supports up to 5-series cells or
typical 18-V packs, the bq76930 handles up to 10-
series cells or typical 36-V packs, and the bq76940
works for up to 15-series cells or typical 48-V packs.
A variety of battery chemistries may be managed with
these AFEs, including Lithium Ion, Lithium iron
phosphate, and more. Through I2C, a host controller
can use the bq769x0 to implement many battery pack
management functions, such as monitoring (cell
voltages, pack current, pack temperatures),
protection (controlling charge/discharge FETs), and
balancing. Integrated A/D converters enable a purely
digital readout of critical system parameters, with
calibration handled in TI’s manufacturing process.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq76920
TSSOP (20)
6.50 mm × 4.40 mm
bq76930
TSSOP (30)
7.80 mm × 4.40 mm
bq76940
TSSOP (44)
11.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
Rc
Cc
Rc
Cc
Rc
Cc
Rc
Cc
Rc Cc
Cc
Rc
VC 5
VC 4
VC 3
VC 2
VC 1
VC 0
SRP
SRN
ALERT
BAT
REGSRC
REGOUT
CAP1
TS1
SCL
SDA
VSS
CHG
DSG
0.1 µF 0.1 µF 0.1 µF
100 100
Rsns
1M
PACK +
Rf
10 kΩ
10k
1 µF 1 µF Cf
4.7 µF
PUSH-BUTTON FOR BOOT
1M
VCC
SCL
SDA
Companion
Controller
GPIO
VSS
1M
PACK–
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.



Texas Instruments bq76930
bq76920, bq76930, bq76940
SLUSBK2H – OCTOBER 2013 – REVISED MARCH 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Device Comparison Table..................................... 4
7 Pin Configuration and Functions ......................... 5
7.1 Versions .................................................................... 5
7.2 bq76920 Pin Diagram ............................................... 6
7.3 bq76930 Pin Diagram ............................................... 7
7.4 bq76940 Pin Diagram ............................................... 8
8 Specifications....................................................... 10
8.1 Absolute Maximum Ratings .................................... 10
8.2 ESD Ratings .......................................................... 10
8.3 Recommended Operating Conditions..................... 10
8.4 Thermal Information ................................................ 12
8.5 Electrical Characteristics......................................... 12
8.6 Timing Requirements .............................................. 15
8.7 Typical Characteristics ............................................ 17
9 Specifications....................................................... 18
10 Detailed Description ........................................... 19
10.1 Overview ............................................................... 19
10.2 Functional Block Diagram ..................................... 19
10.3 Feature Description............................................... 20
10.4 Device Functional Modes...................................... 29
10.5 Register Maps ....................................................... 31
11 Application and Implementation........................ 41
11.1 Application Information.......................................... 41
11.2 Typical Applications .............................................. 42
12 Power Supply Recommendations ..................... 48
13 Layout................................................................... 48
13.1 Layout Guidelines ................................................. 48
13.2 Layout Example .................................................... 48
14 Device and Documentation Support ................. 51
14.1 Documentation Support ........................................ 51
14.2 Related Links ........................................................ 51
14.3 Receiving Notification of Documentation Updates 51
14.4 Community Resources.......................................... 51
14.5 Trademarks ........................................................... 51
14.6 Electrostatic Discharge Caution ............................ 51
14.7 Glossary ................................................................ 51
15 Mechanical, Packaging, and Orderable
Information ........................................................... 52
5 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision G (April 2016) to Revision H
Page
• Changed Applications............................................................................................................................................................. 1
• Changed the Description ....................................................................................................................................................... 1
• Added High-Side FET Driving .............................................................................................................................................. 26
• Added the link to the bq769x0 Boot Switch Alternatives Application Report ...................................................................... 30
• Added the link to the bq769x0 Family Top Design Considerations Application Report ....................................................... 41
• Added Figure 15 to provide an example of a high-side FET configuration .......................................................................... 45
• Added the link to the bq769x0 Family Top Design Considerations Application Report ....................................................... 48
Changes from Revision F (November 2015) to Revision G
Page
• Changed Electrical Characteristics table to clarify the accuracy of the ADC in different temperature ranges .................... 13
Changes from Revision E (November 2014) to Revision F
Page
• Changed bq7693002 From: Product Preview To Production in the Device Comparison Table ............................................ 4
• Added bq7693007 device to the Device Comparison Table .................................................................................................. 4
• Changed table note to group ground reference in bq76930 Pin Functions ........................................................................... 7
• Changed table note to group ground reference in bq76940 Pin Functions ........................................................................... 8
• Changed 10th cell to 11th cell in the Description of pin 29 ................................................................................................... 9
• Changed table formats for online data sheet ...................................................................................................................... 10
• Changed Handing Ratings table to ESD Ratings................................................................................................................. 10
• Changed note for R1 on Figure 8......................................................................................................................................... 26
2 Submit Documentation Feedback
Copyright © 2013–2019, Texas Instruments Incorporated
Product Folder Links: bq76920 bq76930 bq76940



Texas Instruments bq76930
www.ti.com
bq76920, bq76930, bq76940
SLUSBK2H – OCTOBER 2013 – REVISED MARCH 2019
• Added more description to the Communications Subsystem section .................................................................................. 28
• Changed "SHUTA" to "SHUT_A" and "SHUTB" to "SHUT_B" in the SHIP Mode section................................................... 30
• Changed CAUTION wording (editorial) ................................................................................................................................ 30
• Changed the SHUT_A, SHUT_B bit descriptions in the SYS_CTRL1 (0x04) table............................................................. 34
Changes from Revision D (July 2014) to Revision E
Page
• Added a note to the Absolute Maximum Ratings table ....................................................................................................... 10
• Changed the Handling Ratings............................................................................................................................................. 10
• Added the cross-reference to a new table note at VALERT_IH in Electrical Characteristics .................................................... 15
• Added a new table note........................................................................................................................................................ 15
• Added the Typical Characteristics section............................................................................................................................ 17
• Changed the Alert section ................................................................................................................................................... 28
• Changed verbiage in Communications Subsystem ............................................................................................................. 28
• Deleted the READ/WRITE RSVD register in the Register Map ........................................................................................... 31
• Deleted the READ ONLY register information in the Register Map ..................................................................................... 31
• Changed the reset for Bit 3 in the PROTECT3 register ...................................................................................................... 36
• Changed wording in the ADCGAIN bit descriptions ............................................................................................................ 40
• Added Application and Implementation note ....................................................................................................................... 41
• Added Design Requirements................................................................................................................................................ 46
• Added the Detailed Design Procedure ................................................................................................................................. 46
• Changed the Layout Guidelines ........................................................................................................................................... 48
• Changed the Layout Example ............................................................................................................................................. 48
• Added a Caution .................................................................................................................................................................. 49
• Changed the Good Layout figure ........................................................................................................................................ 49
• Changed the Weak Layout figure ........................................................................................................................................ 50
Changes from Revision C (May 2014) to Revision D
Page
• Changed table reference in Integrated Hardware Protections ............................................................................................. 24
• Changed Integrated Hardware Protections wording............................................................................................................. 25
Changes from Revision B (April 2014) to Revision C
Page
• Changed some devices from Product Preview to Production Data ....................................................................................... 4
• Changed a bit name in the PROTECT1 register ................................................................................................................. 35
• Changed a bit name in the ADCGAIN2 register .................................................................................................................. 40
Changes from Revision A (December 2013) to Revision B
Page
• Changed Ordering Information table to Device Comparison Table........................................................................................ 4
• Changed some devices to Product Preview........................................................................................................................... 4
• Changed Rf max value in the Recommended Operating Conditions table ......................................................................... 11
• Changed verbiage in Communications Subsystem ............................................................................................................. 28
• Changed SYS_STAT D6 bit name in the Register Map....................................................................................................... 31
Copyright © 2013–2019, Texas Instruments Incorporated
Product Folder Links: bq76920 bq76930 bq76940
Submit Documentation Feedback
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