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| BD99954應用處理器鋰電池充電管理方案 |
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| 文章來源：永阜康科技 更新時間：2017/12/18 11:21:00 |
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rohm公司的BD99954是1到4節鋰電池雙模式充電管理器,小型5.0x5.0mm QFN封裝和2.6x3.0mm芯片級CSP封裝,提供雙源電池充電器,兩個端口BC1.2檢測和用于電壓,電流,溫度的電池監視器以及告警控制器.主要用在空間嚴格限制的設備如小尺寸筆記本電腦,平板電腦和其它應用.本文介紹了BD99954主要特性,功能框圖,應用電路以及評估板BD99954MWV EVK主要特性,電路圖,USB-I2C電路圖,材料清單和PCB設計圖.
The Industry ’s First Dual-Mode Battery Charge ICBD99954 is a Battery Management LSI for 1-4 cellLithium-Ion secondary battery, and available in a 40pin0.40 mm pitch 5.0 mm x 5.0 mm QFN package and small41-ball 0.4mm pitch 2.6mm x 3.0mm Wafer-Level CSP package which is designed to meet high degree demandsfor space-constraint equipment such as Low profileNotebook PC, Tablets and other applications.
BD99954 provides a Dual-source Battery Charger, twoport BC1.2 detection and a Battery Monitor with severalalarm(INT#, PROCHOT#) outputsBD99954 is a Battery Manager IC for 1-4Cell Lithium-Ion / Lithium-Ion polymer secondary battery pack used in portableequipment such as Tablets, Ultra books or others.
BD99954 includes a Battery Charger, two port BC1.2 detection, a Battery Monitor for voltage, current, temperature andalarm(INT#, PROCHOT#) Controller.
BD99954主要特性:
Dual-source Battery Charger
High efficiency Step-Up/Down switching charger for1-4 cell Li-Ion/Li-poly battery
Two separate input sources for USB-VBUS and DCadapter.
Two port BC1.2 detectors.
JEITA compliant charging profile
Programmable parameters for Preconditioning, Prechargecurrent,and Fast-charge current
Programmable charging voltage
Programmable charge current
Programmable Switching Frequency: 600kHz to1.2MHz
Support USB BCS 1.2, ACA, ID pin, OTG
USB-VBUS Over Voltage Protection
Over Voltage Battery Protection
Battery Short Circuit Detection
Power Path Management with charge pump gatedriver
Flexibility power path control
Reverse Buck/Boost Option for USB/USB-PD
Bias voltage output for the external thermistor
PMON output
PROCHOT# output
Support Inhibit / Autonomous Charging
Battery Learn Function
Input Operating Range: 3.8V to 25V
Voltage Measurement for Thermistor.
Bias voltage output for the external thermistor.
SMBus Interface (Clock up friendly I2C) for Hostcommunication
Embedded OTPROM for initial settings
BD99954應用:
Ultrabook
Notebook PC
Ultra-mobile PC
Tablet PC
圖1.BD99954功能框圖
圖2.BD99954應用電路圖
評估板BD99954MWV EVK
This application note provides information on the BD99954MWV EVK board, which includes the bill of materials, schematics, boardlayout, and application data. In addition to this, a user manual for the I2C control software is included to help program theBD99954MWV.
The BD99954MWV EVK acts as a platform for the BD99954 battery management LSI. With the included software GUI, users canaccess the battery charging profile and modify and read back the registers of the BD99954.
評估板BD99954MWV EVK應用:
1-4 Li-ion Cells (in series) Battery Charging
評估板BD99954MWV EVK主要特性:
Reverse Buck/Boost Option
On-Board USB-to-I2C Communication Circuit
Input Operating Range: 3.8V to 25V
評估板BD99954MWV EVK工作極限和最大值:
圖3.評估板BD99954MWV EVK外形圖
圖4. 評估板BD99954MWV EVK電路圖(1)
圖5. 評估板BD99954MWV EVK電路圖(2):USB-I2C
評估板BD99954MWV EVK材料清單:
USB-I2C材料清單:
圖6. 評估板BD99954MWV EVK PCB布局圖(1):頂層
圖7. 評估板BD99954MWV EVK PCB設計圖(2): GND內層1
圖7. 評估板BD99954MWV EVK PCB設計圖(2):PWR內層2
圖8. 評估板BD99954MWV EVK PCB設計圖(3):底層
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