bq24076 Chargers Datasheet

bq24076 Datasheet PDF, Equivalent


Part Number

bq24076

Description

1.5-A High Battery Voltage Li-Ion Battery Chargers

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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bq24076
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bq24076, bq24078
SLUSCM1A – OCTOBER 2017 – REVISED DECEMBER 2017
bq2407x 1.5-A High Battery Voltage Li-Ion Battery Chargers
with Power-Path Management IC
1 Features
1 Fully Compliant USB Charger
– Selectable 100-mA and 500-mA Maximum
Input Current
– 100-mA Maximum Current Limit Ensures
Compliance to USB-IF Standard
– Input-Based Dynamic Power Management
(VIN-DPM) for Protection Against Poor USB
Sources
• 28-V Input Rating with Overvoltage Protection
• Integrated Dynamic Power Path Management
(DPPM) Function Simultaneously and
Independently Powers the System and Charges
the Battery
• Supports up to 1.5-A Charge Current with Current
Monitoring Output (ISET)
• Programmable Input Current Limit up to 1.5 A for
Wall Adapters
• System Output Tracks Battery Voltage
• Battery Disconnect Function with SYSOFF Input
• Programmable Pre-Charge and Fast-Charge
Safety Timers
• Reverse Current, Short-Circuit, and Thermal
Protection
• NTC Thermistor Input
• Proprietary Start-up Sequence Limits Inrush
Current
• Battery Charge Voltage, VBAT:
– bq24076 - 4.4 V (typ)
– bq24078 - 4.35 V (typ)
• Status Indication – Charging/Done, Power Good
2 Applications
• Smart Phones
• Portable Media Players
• Portable Navigation Devices
• Low-Power Handheld Devices
• Portable Gaming
• Headsets
• Wearables
• Home Automation
• Portable Medical
3 Description
The bq2407x is a family of integrated Li-Ion battery
linear chargers with system power path management
functionality targeted at space-constrained portable
applications. The devices operate from either a USB
port or an AC adapter and support charge currents up
to 1.5 A. The input voltage range with input
overvoltage protection supports unregulated
adapters. The USB input current limit accuracy and
start up sequence allow the bq2407x to meet USB-IF
inrush current specifications. Additionally, the input
dynamic power management (VIN-DPM) prevents
system crashes because of incorrectly configured
USB sources and maximizes the power available
from the adapter.
The bq2407x features dynamic power path
management (DPPM) that powers the system while
simultaneously and independently charging the
battery. The DPPM circuit reduces the charge current
when the input current limit causes the system output
to fall to the DPPM threshold; thus, supplying the
system load at all times while monitoring the charge
current separately. This feature reduces the number
of charge and discharge cycles on the battery, allows
for proper charge termination and enables the system
to run with a defective or absent battery pack.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24076
bq24078
VQFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
1kW
1kW
IN
1mF
System
ON/OFF
Control
IN
13
8 VSS
bq24076
bq24078
15 SYSOFF
OUT 10
11
EN 2 5
BAT 2
3
TS 1
4.7mF
SYSTEM
4.7mF
TEMP
PACK+
1.18kW 1.13kW
PACK-
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. PRODUCTION DATA.

bq24076
bq24076, bq24078
SLUSCM1A – OCTOBER 2017 – REVISED DECEMBER 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 3
6 Device Comparison Table..................................... 3
7 Pin Configuration and Functions ......................... 4
8 Specifications......................................................... 5
8.1 Absolute Maximum Ratings ..................................... 5
8.2 ESD Ratings.............................................................. 5
8.3 Recommended Operating Conditions....................... 6
8.4 Thermal Information .................................................. 6
8.5 Dissipation Ratings ................................................... 6
8.6 Electrical Characteristics........................................... 7
8.7 Typical Characteristics .............................................. 9
9 Detailed Description ............................................ 11
9.1 Overview ................................................................. 11
9.2 Functional Block Diagram ....................................... 12
9.3 Feature Description................................................. 13
9.4 Device Functional Modes........................................ 24
10 Application and Implementation........................ 26
10.1 Application Information.......................................... 26
10.2 Typical Application ................................................ 26
11 Power Supply Recommendations ..................... 31
12 Layout................................................................... 31
12.1 Layout Guidelines ................................................. 31
12.2 Layout Example .................................................... 32
12.3 Thermal Considerations ........................................ 33
13 Device and Documentation Support ................. 34
13.1 Device Support...................................................... 34
13.2 Related Links ........................................................ 34
13.3 Receiving Notification of Documentation Updates 34
13.4 Community Resources.......................................... 34
13.5 Trademarks ........................................................... 34
13.6 Electrostatic Discharge Caution ............................ 34
13.7 Glossary ................................................................ 34
14 Mechanical, Packaging, and Orderable
Information ........................................................... 34
4 Revision History
Changes from Original (October 2017) to Revision A
Page
• Changed IIN Test Conditions From: TJ = 85°C To: TJ < 85°C in the Electrical Characteristics table ..................................... 7
2 Submit Documentation Feedback
Product Folder Links: bq24076 bq24078
Copyright © 2017, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity bq24076, bq24078 SLUSCM1A – O CTOBER 2017 – REVISED DECEMBER 2017 b q2407x 1.5-A High Battery Voltage Li-Io n Battery Chargers with Power-Path Mana gement IC 1 Features •1 Fully Compli ant USB Charger – Selectable 100-mA a nd 500-mA Maximum Input Current – 100 -mA Maximum Current Limit Ensures Compl iance to USB-IF Standard – Input-Base d Dynamic Power Management (VIN-DPM) fo r Protection Against Poor USB Sources 28-V Input Rating with Overvoltage P rotection • Integrated Dynamic Power Path Management (DPPM) Function Simulta neously and Independently Powers the Sy stem and Charges the Battery • Suppor ts up to 1.5-A Charge Current with Curr ent Monitoring Output (ISET) • Progra mmable Input Current Limit up to 1.5 A for Wall Adapters • System Output Tra cks Battery Voltage • Battery Disconn ect Function with SYSOFF Input • Prog rammable Pre-Charge and Fast-Charge Safety Timers • Reverse Current, Short-Circuit, and T.
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