Dual Input Li-Ion Charger with Dynamic Power Path, Output regulated to 4.4V, Vbat 4.2V
|Product Categories :||Power management ; Battery management ; Battery charger ICs|
|Datasheet:||BQ24032ARHL Datasheet (PDF)|
|RoHs Status:||Lead free/RoHS Compliant|
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BQ24032ARHL Product Details
The bqTINY III-series of devices are highly integrated Li-ion linear chargers and system power-path management devices targeted at space-limited portable applications. The bqTINY III-series offer integrated USB-port and DC supply (AC adapter), power-path management with autonomous power-source selection, power FETs and current sensors, high accuracy current and voltage regulation, charge status, and charge termination, in a single monolithic device.
The bqTINY III-series powers the system while independently charging the battery. This feature reduces the charge and discharge cycles on the battery, allows for proper charge termination and allows the system to run with an absent or defective battery pack. This feature also allows for the system to instantaneously turn on from an external power source in the case of a deeply discharged battery pack. The IC design is focused on supplying continuous power to the system when available from the AC, USB, or battery sources.
The power select pin, PSEL, defines which input source is to be used first (primary source – AC or USB). If the primary source is not available, then the IC automatically switches over to the other secondary source if available or the battery as the last option. If the PSEL is set low, the USB input is selected first and if not available, the AC line is selected (if available) but programmed to a USB input limiting rate (100 mA/500 mA max). This feature allows the use of one input connector, where the host programs the PSEL pin according to what source is connected (AC adaptor or USB port).
The bq24038 replaces USBPG with pin VBSEL, to enable user selection of the charge voltage. In addition, pin ACPG was modified to PG. PG is active low when either ac power or USB power is detected.
The ISET1 pin programs the battery&3146;s fast charge constant current level with a resistor. During normal AC operation, the input supply provides power to both the OUT (System) and BAT pins. For peak or excessive loads (typically when operating from the USB power, PSEL = Low) that would cause the input source to enter current limit (or Q3 - USB FET limiting current) and its source and system voltage (OUT pin) to drop, the dynamic power-path management (DPPM) feature reduces the charging current attempting to prevent any further drop in system voltage. This feature allows the selection of a lower current rated adaptor based on the average load (ISYS-AVG + IBAT-PGM ) rather than a high peak transient load.
- Small 3.5-mm × 4.5-mm QFN Package
- Designed for Single-Cell Li-Ion- or Li-Polymer-
Based Portable Applications
- Integrated Dynamic Power-Path Management (DPPM)
Feature Allowing the AC Adapter or the USB Port
to Simultaneously Power the System and Charge
- Power Supplement Mode Allows Battery to Supplement
the USB or AC Input Current
- Autonomous Power Source Selection (AC Adapter
- Integrated USB Charge Control With Selectable
100-mA and 500-mA Maximum Input Current Regulation
- Dynamic Total Current Management for USB
- Supports Up to 2-A Total Current
- 3.3-V Integrated LDO Output
- Thermal Regulation for Charge Control
- Charge Status Outputs for LED or System Interface
Indicates Charge and Fault Conditions
- Reverse Current, Short-Circuit, and Thermal
- Power Good (AC Adapter and USB Port Present)
- Charge Voltage Options: 4.1 V, 4.2 V, or 4.36 V
- Smart Phones and PDAs
- MP3 Players
- Digital Cameras Handheld Devices
- Internet Appliances
- Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube
- RoHs Status
- Lead free/RoHS Compliant
BQ24032A Family Datasheet
BQ24032ARHL Related Products
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1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
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All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment.
If there is something wrong with the BQ24032ARHL we delivered, we will accept the replacement or return of the BQ24032ARHL only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
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