bq24230H Management Datasheet

bq24230H Datasheet, PDF, Equivalent


Part Number

bq24230H

Description

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

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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bq24230H
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bq24230H, bq24232H
SLUSBI8B – JANUARY 2014 – REVISED MAY 2017
bq2423xx 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
• 4.35-V Battery Regulation
• 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 (bq24232H)
• 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
The bq2423xH 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 feature enables instant system turn-
on even with a totally discharged battery. The power-
path management architecture also lets the battery
supplement the system current requirements when
the adapter cannot deliver the peak system currents,
thus 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)
bq2423xx
VQFN (16)
3.00 mm x 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
3 Description
The bq2423xH 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 from 25 mA to 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 bq2423xH to meet USB-IF inrush current
specifications. Additionally, the input dynamic power
management (VIN-DPM) prevents the charger from
crashing poorly designed or incorrectly configured
USB sources.
1
Adaptor
DC
1mF
GND
IN
13
8 VSS
bq24232H
15 TD
OUT 10
11
EN2 5
BAT 2
3
TS 1
4.7mF
4.7mF
PACK+
TEMP
SYSTEM
2.94 kΩ 4.32 kΩ
PACK-
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.

bq24230H
bq24230H, bq24232H
SLUSBI8B – JANUARY 2014 – 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..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ..................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics........................................... 5
7.6 Typical Characteristics .............................................. 9
8 Detailed Description ............................................ 11
8.1 Overview ................................................................. 11
8.2 Functional Block Diagram ....................................... 12
8.3 Feature Description................................................. 13
8.4 Device Functional Modes........................................ 23
9 Application and Implementation ........................ 25
9.1 Application Information............................................ 25
9.2 Typical Application .................................................. 25
9.3 System Examples ................................................... 30
10 Power Supply Recommendations ..................... 31
10.1 Requirements for OUT Output .............................. 31
10.2 USB Sources and Standard AC Adapters ............ 31
10.3 Half-Wave Adapters .............................................. 31
11 Layout................................................................... 31
11.1 Layout Guidelines ................................................. 31
11.2 Layout Example .................................................... 32
11.3 Thermal Package .................................................. 33
12 Device and Documentation Support ................. 34
12.1 Documentation Support ........................................ 34
12.2 Related Links ........................................................ 34
12.3 Trademarks ........................................................... 34
12.4 Electrostatic Discharge Caution ............................ 34
12.5 Glossary ................................................................ 34
13 Mechanical, Packaging, and Orderable
Information ........................................................... 34
4 Revision History
Changes from Revision A (November 2014) to Revision B
Page
• Changed from "Table 2" to "Table 1" in the Pin Functions Description column for EN1/EN2 .............................................. 3
Changes from Original (January 2014) to Revision A
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
2 Submit Documentation Feedback
Copyright © 2014–2017, Texas Instruments Incorporated
Product Folder Links: bq24230H bq24232H


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity bq24230H, bq24232H SLUSBI8B – JANUARY 2014 – REVISED MAY 2017 bq24 23xx USB-Friendly Lithium-Ion Battery C harger and Power-Path Management IC 1 Features •1 Fully Compliant USB Charg er – Selectable 100-mA and 500-mA Max imum Input Current – 100-mA Maximum C urrent Limit Ensures Compliance to USB- IF Standard – Input-based Dynamic Pow er Management (VIN– DPM) for Protecti on Against Poor USB Sources • 28-V In put Rating With Overvoltage Protection • 4.35-V Battery Regulation • Integ rated Dynamic Power-Path Management (DP PM) Function Simultaneously and Indepen dently Powers the System and Charges th e Battery • Supports up to 500-mA Cha rge Current With Current Monitoring Out put (ISET) • Programmable Input Curre nt Limit up to 500 mA for Wall Adapters • Programmable Termination Current ( bq24232H) • Programmable Precharge an d Fast-Charge Safety Timers • Reverse Current, Short-Circuit, and Thermal Protection • NTC .
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