BQ24032A
- 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
the Battery - Power Supplement Mode Allows Battery to Supplement
the USB or AC Input Current - Autonomous Power Source Selection (AC Adapter
or USB) - Integrated USB Charge Control With Selectable
100-mA and 500-mA Maximum Input Current Regulation
Limits - 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
Protection - Power Good (AC Adapter and USB Port Present)
Status Outputs - Charge Voltage Options: 4.1 V, 4.2 V, or 4.36 V
- APPLICATIONS
- Smart Phones and PDAs
- MP3 Players
- Digital Cameras Handheld Devices
- Internet Appliances
All other trademarks are the property of their respective owners
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.
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技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | bq2403x Single-Chip Charge and System Power-path Management IC (bqTINY™) datasheet (Rev. I) | PDF | HTML | 2014年 12月 30日 |
Application note | Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) | 2018年 5月 1日 | ||
User guide | Power-Path Li-Ion Charger Selection | 2008年 10月 17日 | ||
Analog Design Journal | Host-Side Gas-Gauge-System Design Considerations for Single-Cell Handheld Apps | 2007年 10月 12日 | ||
User guide | bq2403x (bqTiny-111) 1.5-A Single-Chip LiIon & Li-Pol Charge Mgmt IC EVM (Rev. A) | 2006年 12月 11日 |
設計與開發
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BQ24032AEVM — BQ24032A 評估模組
The Texas Instruments bq24032AEVM is the evaluation module (EVM) for the bq24032A Single-Chip Charge and Dynamic Power-Path Management IC in 3.5x4.5 mm2 QFN package. The EVM is a complete bq24032A based circuit and provides a convenient method to evaluate the operation and performance of the IC.
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封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
VQFN (RHL) | 20 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。