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BQ2962 Datasheet Preview

BQ2962 Datasheet

Overvoltage Protection

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BQ2961, BQ2962
SLUSBU5H – NOVEMBER 2013 – REVISED SEPTEMBER 2019
BQ296xxx Overvoltage Protection for 2-Series, 3-Series, and 4-Series Cell
Li-Ion Batteries with Regulated Output Supply
1 Features
1 2-series, 3-series, and 4-series cell overvoltage
protection (OVP)
• Fixed delay timer to trigger FET drive output
(3-s, 4-s, 5.5-s, or 6.5-s options)
• Factory programmed OVP threshold (threshold
range 3.85 V to 4.6 V)
• Output options: active high
• High-accuracy overvoltage protection:
±10 mV
• Regulated supply output with self-disable and/or
external enable/disable control
– Options: 3.3-V, 2.5-V, and 1.8-V (BQ2960,
BQ2961)
– Options: 3.3-V, 3.15-V, 3.0-V (BQ2962)
• Low power consumption ICC ~ 4 µA
(VCELL(ALL) < VPROTECT)
• Extra low power consumption with reg output
disabled, ICC ~ 1.2 µA
• Low leakage current per cell input < 100 nA
• Small package footprint
– 8-Pin WSON (2 mm × 2 mm)
2 Applications
• Notebook PC
• Ultrabooks
• Medical
• UPS battery backup
3 Description
The BQ296xxx family is a high-accuracy, low-power
overvoltage protector with a 2-mA regulated output
supply for Li-Ion battery pack applications.
Each cell in a 2-series to 4-series cell stack is
individually monitored for an overvoltage condition.
An internally fixed-delay timer is initiated upon
detection of an overvoltage condition on any cell.
Upon expiration of the delay timer, an output pin is
triggered into an active state to indicate that an
overvoltage condition has occurred.
The regulated output supply delivers up to 2-mA
(max) output current to drive always-on circuits, such
as a real-time clock (RTC) oscillator. The BQ296xxx
family has a self-disable function to turn off the
regulated output if any cell voltage falls below a
certain threshold, thereby preventing drain on the
battery, and provides an external control to enable or
disable the regulated output.
Device Information(1)(2)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
BQ2960
BQ2961
WSON (8)
2.00 mm × 2.00 mm
BQ2962
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
(2) The BQ2960 is a 2-series to 3-series device. The BQ2961
and BQ2962 are 2-series to 4-series devices.
Simplified Schematic
100 Ÿ
VCELL3
VCELL2
VCELL1
1
0.1 µF
1
1 0.1 µF
0.1 µF
VDD
V3
bq2960
V2
OUT
REG
VSS
V1 REG_EN
PWPD
Protector Pack +
FETs
5 (*)
External
Circuit
e.g., RTC
0.1 µF
0.47 µF
* can be removed if Vss will be
connected first during cell
connection
Pack ±
100 Ÿ
VCELL4
VCELL3
VCELL2
VCELL1
1
1 0.1 µF
1 0.1 µF
1 0.1 µF
0.1 µF
VDD
V4 bq2961
V3 bq2962
OUT
REG
VSS
V2 V1
PWPD
Protector Pack +
FETs
5 (*)
External
Circuit
e.g., RTC
0.1 µF
0.47 µF
* can be removed if Vss will be
connected first during cell
connection
Pack ±
bq2960 REG out is controlled by MCU
10 M
(Optional)
MCU
CTL
Copyright © 2017, 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.




etcTI

BQ2962 Datasheet Preview

BQ2962 Datasheet

Overvoltage Protection

No Preview Available !

BQ2961, BQ2962
SLUSBU5H – NOVEMBER 2013 – REVISED SEPTEMBER 2019
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
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 Electrical Characteristics........................................... 7
7.6 Typical Characteristics .............................................. 9
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 11
8.3 Feature Description................................................. 12
8.4 Device Functional Modes........................................ 15
9 Application and Implementation ........................ 18
9.1 Application Information............................................ 18
9.2 Typical Application .................................................. 18
10 Power Supply Recommendations ..................... 22
11 Layout................................................................... 22
11.1 Layout Guidelines ................................................. 22
11.2 Layout Example .................................................... 22
12 Device and Documentation Support ................. 23
12.1 Receiving Notification of Documentation Updates 23
12.2 Support Resources ............................................... 23
12.3 Trademarks ........................................................... 23
12.4 Electrostatic Discharge Caution ............................ 23
12.5 Glossary ................................................................ 23
13 Mechanical, Packaging, and Orderable
Information ........................................................... 23
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision G (May 2019) to Revision H
Page
• Added the BQ296222 and BQ296226 PRODUCT PREVIEW devices to the Device Comparison Table ............................. 4
• Added tDELAY_RESET .................................................................................................................................................................. 7
Changes from Revision F (May 2019) to Revision G
Page
• Added the BQ296223 and BQ296224 devices to the Device Comparison Table.................................................................. 4
Changes from Revision E (June 2018) to Revision F
Page
• Added the BQ296215 device to the Device Comparison Table ............................................................................................ 4
Changes from Revision D (January 2017) to Revision E
Page
• Changed Description .............................................................................................................................................................. 1
• Added the BQ296221 device to the Device Comparison Table............................................................................................. 4
• Changed Regulated Supply Output, REG ........................................................................................................................... 12
• Changed Detailed Design Procedure ................................................................................................................................... 19
Changes from Revision C (October 2016) to Revision D
Page
• Changed device label from "BQ2960xy" to "BQ2960" and changed device label from "BQ2961xy" to
"BQ2961/BQ2962" in the Simplified Schematic .................................................................................................................... 1
• Removed BQ296100 preview status. Added BQ296216, BQ296217 device spins to the Device Comparison Table .......... 4
• Extended IDD test condition from (Vn–Vn-1) = 3.8V to (Vn–Vn-1) = 2 V to 4.15 V ...................................................................... 7
• Added VOUT TYP and MAX specification ............................................................................................................................... 7
• Added VREG specification at 500 µA load. Was only specified with 0~1-mA range before.................................................. 8
• Extended IREG MAX specification to 2 mA, was 1 mA before ............................................................................................. 8
2 Submit Documentation Feedback
Copyright © 2013–2019, Texas Instruments Incorporated
Product Folder Links: BQ2961 BQ2962


Part Number BQ2962
Description Overvoltage Protection
Maker etcTI
Total Page 30 Pages
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