Battery Charger. bq24616 Datasheet

bq24616 Charger. Datasheet pdf. Equivalent

Part bq24616
Description Li-Ion or Li-Polymer Battery Charger
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bq24616
Product
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Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
bq24616
SLUSA49C – APRIL 2010 – REVISED JUNE 2015
bq24616 JEITA Guideline Compatible Stand-Alone Synchronous Switched-Mode Li-Ion or
Li-Polymer Battery Charger With System Power Selector and Low Iq
1 Features
2 Applications
1 Battery Thermistor Sense for JEITA Guideline
Compatible Charger
• 600-kHz NMOS-NMOS Synchronous Buck
Converter
• Stand-Alone Charger Support for Li-Ion or Li-
Polymer
• 5-V–28-V VCC Input Operating Range and
Supports 1 to 6 Battery Cells
• Up to 10-A Charge Current and Adapter Current
• High-Accuracy Voltage and Current Regulation
– ±0.5% Charge Voltage Accuracy
– ±3% Charge Current Accuracy
– ±3% Adapter Current Accuracy
• Integration
– Automatic System Power Selection From
Adapter or Battery
– Internal Loop Compensation
– Internal Soft-Start
– Dynamic Power Management
• Safety Protection
– Input Overvoltage Protection
– Battery Detection
– Reverse Protection Input FET
– Programmable Safety Timer
– Charge Overcurrent Protection
– Battery Short Protection
– Battery Overvoltage Protection
– Thermal Shutdown
• Status Outputs
– Adapter Present
– Charger Operation Status
• Charge Enable Pin
• 6-V Gate Drive for Synchronous Buck Converter
• 30-ns Driver Dead-Time and 99.5% Maximum
Effective Duty Cycle
• 24-Pin, 4-mm × 4-mm QFN Package
• Energy Star Low Quiescent Current Iq
– < 15-µA Off-State Battery Discharge Current
– < 1.5-mA Off-State Input Quiescent Current
• Netbooks, Mobile Internet Devices, and Ultra-
Mobile PCs
• Industrial and Medical Equipment
• Personal Digital Assistants
• Handheld Terminals
• Portable Equipment
3 Description
The bq2461x device is a highly integrated, Japan
Electronic Information Technology Association
(JEITA) guideline-compatible, Li-ion or Li-polymer
switched-mode battery charge controller. The device
offers a constant-frequency synchronous switching
PWM controller with high-accuracy charge current
and voltage regulation, charge preconditioning,
termination, adapter current regulation, and charge
status monitoring
The bq2461x charges the battery in three phases:
preconditioning, constant current, and constant
voltage. Charge is terminated when the current
reaches a minimum user-selectable level. A
programmable charge timer provides a safety
backup. The bq2461x automatically restarts the
charge cycle if the battery voltage falls below an
internal threshold, and enters a low quiescent current
sleep mode when the input voltage falls below the
battery voltage.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24616
VQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
ADAPTER
Typical Application Schematic
ACP ACN
ACDRV BATDRV
CE
VREF
ISET1
ISET2
ACSET
HIDRV
PH
LODRV
SYSTEM
Battery
pack
VREF
ADAPTER
STAT1
STAT2
PG
TS
SRP
SRN
VFB
TTC
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. PRODUCTION DATA.



bq24616
bq24616
SLUSA49C – APRIL 2010 – REVISED JUNE 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings ............................................................ 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 6
7.5 Electrical Characteristics........................................... 6
7.6 Typical Characteristics ............................................ 11
8 Detailed Description ............................................ 14
8.1 Overview ................................................................ 14
8.2 Functional Block Diagram ....................................... 15
8.3 Feature Description................................................. 16
8.4 Device Functional Modes........................................ 25
9 Application and Implementation ........................ 26
9.1 Application Information............................................ 26
9.2 Typical Application .................................................. 26
10 Power Supply Recommendations ..................... 32
11 Layout................................................................... 32
11.1 Layout Guidelines ................................................. 32
11.2 Layout Examples................................................... 33
12 Device and Documentation Support ................. 34
12.1 Device Support...................................................... 34
12.2 Documentation Support ........................................ 34
12.3 Community Resources.......................................... 34
12.4 Trademarks ........................................................... 34
12.5 Electrostatic Discharge Caution ............................ 34
12.6 Glossary ................................................................ 34
13 Mechanical, Packaging, and Orderable
Information ........................................................... 34
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (October 2011) to Revision C
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section .................................................................................................. 1
Changes from Revision A (May 2010) to Revision B
Page
• Changed descriptions of PH and BTST pins.......................................................................................................................... 4
• Added added text, equations and illustrations from Inductor Selection to PCB Layout ....................................................... 27
• Corrected equation for caclulating voltage ripple on output capacitor ................................................................................. 28
2
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