bq24230 Management Datasheet

bq24230 Datasheet, PDF, Equivalent


Part Number

bq24230

Description

USB-Friendly Lithium-Ion Battery Charger And Power-Path Management

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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bq24230
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bq24230, bq24232
SLUS821J – OCTOBER 2008 – REVISED MAY 2017
bq2423x USB-Friendly Lithium-Ion Battery Charger And 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 500-mA Charge Current With
Current Monitoring Output (ISET)
• Programmable Input Current Limit up to 500 mA
for Wall Adapters
• Programmable Termination Current (bq24232)
• Programmable Precharge and Fast-Charge Safety
Timers
• Reverse Current, Short-Circuit, and Thermal
Protection
• NTC Thermistor Input
• Proprietary Start-Up Sequence Limits Inrush
Current
• Status Indication – Charging/Done, Power Good
• Small 3 mm × 3 mm 16-Lead QFN Package
2 Applications
Bluetooth™ Devices
• Low-Power Handheld Devices
3 Description
The bq2423x series of devices are highly integrated
Li-ion linear chargers and system power-path
management devices targeted at space-limited
portable applications. The devices operate from either
a USB port or ac adapter and support charge
currents between 25 mA and 500 mA. The high-input-
voltage range with input overvoltage protection
supports low-cost, unregulated adapters. The USB
input current limit accuracy and start-up sequence
allow the bq2423x to meet USB-IF inrush current
specification. Additionally, the input dynamic power
management (VIN-DPM) prevents the charger from
crashing poorly designed or incorrectly configured
USB sources.
The bq2423x 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.
Additionally, this enables instant system turn-on even
with a totally discharged battery. The power-path
management architecture also permits the battery to
supplement the system current requirements when
the adapter cannot deliver the peak system currents,
enabling the use of a smaller adapter.
The battery is charged in three phases: conditioning,
constant current, and constant voltage. In all charge
phases, an internal control loop monitors the IC
junction temperature and reduces the charge current
if the internal temperature threshold is exceeded.
The charger power stage and charge current sense
functions are fully integrated. The charger function
has high-accuracy current and voltage regulation
loops, charge status display, and charge termination.
The input current limit and charge current are
programmable using external resistors.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24230
bq24232
VQFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Circuit
1 kΩ
1 kΩ
Adaptor
DC
1mF
GND
IN
13
8 VSS
bq24230
15 TD
OUT 10
11
EN2 5
BAT 2
3
TS 1
4.7mF
4.7mF
TEMP
PACK+
SYSTEM
2.94 kΩ 4.32 kΩ
PACK-
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.

bq24230
bq24230, bq24232
SLUS821J – OCTOBER 2008 – REVISED MAY 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 5
6 Pin Configuration and Functions ......................... 5
7 Specifications......................................................... 7
7.1 Absolute Maximum Ratings ...................................... 7
7.2 ESD Ratings.............................................................. 7
7.3 Recommended Operating Conditions....................... 7
7.4 Thermal Information ................................................. 8
7.5 Electrical Characteristics........................................... 8
7.6 Timing Requirements .............................................. 11
7.7 Typical Characteristics ............................................ 12
8 Detailed Description ............................................ 14
8.1 Overview ................................................................. 14
8.2 Functional Block Diagram ....................................... 15
8.3 Feature Description................................................. 16
8.4 Device Functional Modes........................................ 22
9 Application and Implementation ........................ 29
9.1 Application Information............................................ 29
9.2 Typical Applications ................................................ 29
10 Power Supply Recommendations ..................... 35
10.1 Requirements for OUT Output .............................. 35
10.2 USB Sources and Standard AC Adapters ............ 35
10.3 Half-Wave Adapters .............................................. 35
11 Layout................................................................... 35
11.1 Layout Guidelines ................................................. 35
11.2 Layout Example .................................................... 36
11.3 Thermal Package .................................................. 36
12 Device and Documentation Support ................. 37
12.1 Documentation Support ........................................ 37
12.2 Related Links ........................................................ 37
12.3 Trademarks ........................................................... 37
12.4 Electrostatic Discharge Caution ............................ 37
12.5 Glossary ................................................................ 37
13 Mechanical, Packaging, and Orderable
Information ........................................................... 37
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision I (November 2015) to Revision J
Page
• Changed from "Table 2" to "Table 1" in the Pin Functions Description column for pins EN2/EN1........................................ 5
Changes from Revision H (June 2015) to Revision I
Page
• Changed the Pin Functions ISET pin description resistor value from 3-kΩ to 1.8-kΩ, to match the value in the
Recommended Operating Conditions table. .......................................................................................................................... 6
• Changed KTMR MIN TYP MAX values FROM "30, 40, 50" TO "36, 48, 60" s/kΩ, respectively, in the Timing
Requirements table............................................................................................................................................................... 11
• Changed textual content of Input Voltage Dynamic Power Management, (VIN_DPM) section for clarification. ...................... 18
• Changed textual content of Dynamic Power Path Management (DPPM) section for clarification. ..................................... 18
• Changed textual content of Battery Supplement Mode section for clarification ................................................................... 18
• Changed textual content of Battery Pack Temperature Monitoring section for clarification................................................. 21
• Added Modifying / Extending the Allowable Temperature Range for Charging sub-section heading and text for
clarification............................................................................................................................................................................ 21
• Changed "6.25-hour" TO " 7.5-hour" Fast Charge Safety Timer in the Using The bq24232 In A Stand-Alone Charger
Application section................................................................................................................................................................ 29
Changes from Revision G (March 2015) to Revision H
Page
• Changed CE pin Description in the Pin Functions table from "Connect CE to a high logic level to place the battery
charger in standby mode...." to "Connect CE to a high logic level to disable battery charging". ........................................... 5
• Changed the ILIM pin Description From: "Connect a 2.75-kto 8.4-kresistor...." To: "Connect a 3.1-kto 7.8-k
resistor..."................................................................................................................................................................................ 5
• Changed "IPRECHG Precharge current" spec to "KIPRECHG Precharge current factor" in the Electrical Characteristics table. 10
• Moved timing specifications from Electrical Characteristics table to Timing Requirements table ....................................... 11
• Changed Requirements for OUT Output section text from "> VBATUVLO" to "around 2.2 V". .......................................... 35
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Copyright © 2008–2017, Texas Instruments Incorporated
Product Folder Links: bq24230 bq24232


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity bq24230, bq24232 SLUS821J – O CTOBER 2008 – REVISED MAY 2017 bq2423 x USB-Friendly Lithium-Ion Battery Char ger And Power-Path Management IC 1 Fea tures •1 Fully Compliant USB Charger – Selectable 100-mA and 500-mA Maximu m Input Current – 100-mA Maximum Curr ent Limit Ensures Compliance to USB-IF Standard – Input-based Dynamic Power Management (VIN- DPM) for Protection Ag ainst Poor USB Sources • 28-V Input R ating With Overvoltage Protection • I ntegrated Dynamic Power-Path Management (DPPM) Function Simultaneously and Ind ependently Powers the System and Charge s the Battery • Supports up to 500-mA Charge Current With Current Monitoring Output (ISET) • Programmable Input C urrent Limit up to 500 mA for Wall Adap ters • Programmable Termination Curre nt (bq24232) • Programmable Precharge and Fast-Charge Safety Timers • Reve rse Current, Short-Circuit, and Thermal Protection • NTC Thermistor Input • Proprietary S.
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