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bq771802 Datasheet Preview

bq771802 Datasheet

Overvoltage Protection

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www.ti.com
BQ7718
SLUSAX1I – DECEMBER 2012 – REVISED JBUQLY72701280
SLUSAX1I – DECEMBER 2012 – REVISED JULY 2020
BQ7718 Overvoltage Protection for 2-Series to 5-Series Cell Li-Ion Batteries
with Internal Delay Timer
1 Features
3 Description
• 2-, 3-, 4-, and 5-series cell overvoltage protection
• Internal delay timer
• Fixed OVP threshold
• High-accuracy overvoltage protection:
± 10 mV
• Low power consumption ICC ≈ 1 µA
(VCELL(ALL) < VPROTECT)
• Low leakage current per cell input < 100 nA
Functional Safety-Capable
Documentation available to aid functional safety
system design
• Package footprint options:
– Small 8-pin QFN (3.00 mm × 4.00 mm)
– Leaded 8-pin MSOP (3.00 mm × 5.00 mm,
including leads)
2 Applications
• Protection for li-ion battery packs used in:
Handheld garden tools
Handheld power tools
Cordless vacuum cleaners
UPS battery backup
Light electric vehicles (eBike, eScooter, pedal
assist bicycles)
The BQ7718xy family of products provides an
overvoltage monitor and protector for Li-Ion battery
pack systems. Each cell is monitored independently
for an overvoltage condition. For quicker production-
line testing, the BQ7718xy device provides a
Customer Test Mode (CTM) with greatly reduced
delay time.
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).
Device Information Table
PART NUMBER PACKAGE
BQ771800(1)
DPJ (8)
BQ771800(2)
DGK (8)
BODY SIZE (NOM)
3.00 mm × 4.00 mm
3.00 mm x 3.00 mm (3.00
mm x 5.00 mm, including
leads)
(1) For available catalog packages, see the orderable addendum
at the end of the data sheet and the Section 5.
(2) Contact TI for more information.
PACK+
RVD
VDD
C VD
RIN
V5
CIN
RIN
V4
CIN
RIN
V3
CIN
RIN
V2
CIN
RIN
V1
CIN
VSS
VOV
OSC
REG
INT_EN
Delay
Timer
OUT
PACK–
Copyright © 2016, Texas Instruments Incorporated
Simplified Schematic
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
Copyrighint t©el2le0c2t0uTael xparsoIpnesrtrtuymmeanttsteIrnscoarnpdoraottehder important disclaimers. UNLESS OTHERWISE NOTED, this docSuumbemnitt cDoonctuaminesnPtRFOeeDdUbCacTkION 1
DATA.
Product Folder Links: BQ7718




etcTI

bq771802 Datasheet Preview

bq771802 Datasheet

Overvoltage Protection

No Preview Available !

BQ7718
SLUSAX1I – DECEMBER 2012 – REVISED JULY 2020
www.ti.com
Table of Contents
1 Features............................................................................1
2 Applications..................................................................... 1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Device Comparison Table...............................................4
6 Pin Configuration and Functions...................................5
Pin Functions.................................................................... 5
7 Specifications.................................................................. 6
7.1 Absolute Maximum Ratings........................................ 6
7.2 ESD Ratings............................................................... 6
7.3 Recommended Operating Conditions.........................6
7.4 Thermal Information....................................................6
7.5 DC Characteristics...................................................... 7
7.6 Timing Requirements.................................................. 8
7.7 Typical Characteristics................................................ 9
8 Detailed Description......................................................10
8.1 Overview................................................................... 10
8.2 Functional Block Diagram......................................... 10
8.3 Feature Description...................................................10
8.4 Device Functional Modes..........................................11
9 Application and Implementation.................................. 13
9.1 Application Information............................................. 13
9.2 Systems Examples................................................... 16
10 Power Supply Recommendations..............................16
11 Layout........................................................................... 17
11.1 Layout Guidelines................................................... 17
11.2 Layout Example...................................................... 17
12 Device and Documentation Support..........................18
12.1 Receiving Notification of Documentation Updates..18
12.2 Support Resources................................................. 18
12.3 Trademarks............................................................. 18
12.4 Electrostatic Discharge Caution..............................18
12.5 Glossary..................................................................18
13 Mechanical, Packaging, and Orderable
Information.................................................................... 18
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision H (February 2020) to Revision I (July 2020)
Page
• Added the Functional Safety-Capable feature....................................................................................................1
• Added the BQ771823 to the Device Comparison Table .................................................................................... 4
• Added BQ771823 to the DC Characteristics ..................................................................................................... 7
• Added BQ771823 delay settings to Section 7.6 ................................................................................................ 8
Changes from Revision G (July 2018) to Revision H (February 2020)
Page
• Added the DGK leaded-package option ............................................................................................................ 1
• Added DGK information to the Device Comparison Table .................................................................................4
• Added the BQ771803 and BQ771818 DGK devices to the Device Comparison Table ..................................... 4
• Changed the BQ771811 device to a catalog device ..........................................................................................4
• Changed the BQ771818 device to a catalog device and deleted the BQ771820 device from the Device
Comparison Table ..............................................................................................................................................4
• Added the DGK pinout image in the Pin Configuration and Functions section ..................................................5
• Deleted BQ771820 from the DC Characteristics ............................................................................................... 7
• Deleted BQ771819............................................................................................................................................. 8
Changes from Revision F (August 2017) to Revision G (July 2018)
Page
• Added the BQ771811 and BQ771818 devices to Production Data.................................................................... 4
Changes from Revision E (March 2017) to Revision F (August 2017)
Page
• Deleted preview products from the Section 5 .................................................................................................... 4
• Clarified the OV Hysteresis, Output Delay, and Output Drive options and added the BQ771818 device to the
Section 5 ............................................................................................................................................................4
• Deleted preview products from VOV Section 7.5 ................................................................................................7
• Deleted preview products from VHYS Section 7.5 .............................................................................................. 7
• Added BQ771818 and BQ771819 delay settings to Section 7.6 ....................................................................... 8
Changes from Revision D (November 2014) to Revision E (March 2017)
Page
• Changed the data sheet device number to BQ7718 ..........................................................................................1
2
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Product Folder Links: BQ7718
Copyright © 2020 Texas Instruments Incorporated



Part Number bq771802
Description Overvoltage Protection
Maker etcTI
Total Page 3 Pages
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