ZHCSKH8C December 2009 – December 2019 BQ24072T , BQ24075T , BQ24079T
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 5 說明 （續(xù)）
- 6 Device Options
- 7 Pin Configuration and Functions
- 8 Specifications
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3
Feature Description
- 9.3.1 Undervoltage Lockout (UVLO)
- 9.3.2 Overvoltage Protection (OVP)
- 9.3.3 Dynamic Power-Path Management
- 9.3.4 Battery Charging
- 9.3.5 Charge Current Translator
- 9.3.6 Battery Detection and Recharge
- 9.3.7 Termination Disable (TD Input, BQ24072T)
- 9.3.8 Battery Disconnect (SYSOFF Input)
- 9.3.9 Dynamic Charge Timers (TMR Input)
- 9.3.10 Status Indicators (PGOOD, CHG)
- 9.3.11 Thermal Regulation and Thermal Shutdown
- 9.3.12 Battery Pack Temperature Monitoring
- 9.4 Device Functional Modes
-
10Applications and Implementation
- 10.1 Application Information
- 10.2
Typical Applications
- 10.2.1
Using the BQ24075T, BQ24079T to Disconnect the Battery from the System
- 10.2.1.1 Design Requirements
- 10.2.1.2
Detailed Design Procedure
- 10.2.1.2.1 Program the Fast Charge Current (ISET):
- 10.2.1.2.2 Program the Input Current Limit (ILIM):
- 10.2.1.2.3 Program 6.25-hour Fast-Charge Safety Timer (TMR):
- 10.2.1.2.4 TS Function:
- 10.2.1.2.5 CHG and PGOOD LED Status:
- 10.2.1.2.6 Processor Monitoring Status:
- 10.2.1.2.7 System ON/OFF (SYSOFF):
- 10.2.1.2.8 Selecting IN, OUT and BAT Capacitors
- 10.2.1.3 Application Curves
- 10.2.2 BQ24072T in a Host Controlled Charger Application
- 10.2.1
Using the BQ24075T, BQ24079T to Disconnect the Battery from the System
- 11Power Supply Recommendations
- 12Layout
- 13器件和文檔支持
- 14機(jī)械、封裝和可訂購信息
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGT|16
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGT|16
訂購信息
3 說明
BQ2407xT 系列器件是集成型鋰離子線性充電器和系統(tǒng)電源路徑管理器件，適用于空間受限的便攜式 應(yīng)用。該器件由 USB 端口或交流適配器供電，支持高達(dá) 1.5A 的充電電流，還具有輸入過壓保護(hù)功能，因此在輸入電壓范圍內(nèi)支持非穩(wěn)壓適配器。BQ2407xT 的 USB 輸入電流限制精度和啟動(dòng)序列使得這款器件能夠符合 USB-IF 浪涌電流規(guī)范。此外，輸入動(dòng)態(tài)電源管理 (VIN-DPM) 可防止充電器損毀錯(cuò)誤配置的 USB 電源。
BQ2407xT 具有 動(dòng)態(tài)電源路徑管理 (DPPM) 功能，可在為系統(tǒng)供電的同時(shí)獨(dú)立為電池充電。當(dāng)輸入電流限制引起系統(tǒng)輸出降至 DPPM 閾值時(shí)，DPPM 電路將減少充電電流；因此，可在為系統(tǒng)負(fù)載供電時(shí)隨時(shí)監(jiān)測充電電流。這個(gè)特性減少了電池上充放電周期的數(shù)量，可實(shí)現(xiàn)充電正常終止并使得系統(tǒng)能夠在由有缺陷或者不完整的電池組供電的情況下運(yùn)行。
器件信息(1)
| 器件型號(hào) | 封裝 | 封裝尺寸（標(biāo)稱值） |
|---|---|---|
| BQ24072T | VQFN (16) | 3.00mm x 3.00mm |
| BQ24075T | ||
| BQ24079T |
- 如需了解所有可用封裝，請(qǐng)參閱數(shù)據(jù)表末尾的可訂購產(chǎn)品附錄。
