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BD99954应用处理器锂电池充电管理方案
文章来源:永阜康科技 更新时间:2017/12/18 11:21:00
rohm公司的BD99954是1到4节锂电池双模式充电管理器,小型5.0x5.0mm QFN封装和2.6x3.0mm芯片级CSP封装,提供双源电池充电器,两个端口BC1.2检测和用于电压,电流,温度的电池监视器以及告警控制器.主要用在空间严格限制的设备如小尺寸笔记本电脑,平板电脑和其它应用.本文介绍了BD99954主要特性,功能框图,应用电路以及评估板BD99954MWV EVK主要特性,电路图,USB-I2C电路图,材料清单和PCB设计图.

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, Prechar
gecurrent,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应用:

 Ultrabook
 Notebook PC
 Ultra-mobile PC
 Tablet PC

图1.BD99954功能框图

图2.BD99954应用电路图

评估板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.

评估板BD99954MWV EVK应用:

1-4 Li-ion Cells (in series) Battery Charging
评估板BD99954MWV EVK主要特性:
Reverse Buck/Boost Option
On-Board USB-to-I2C Communication Circuit
Input Operating Range: 3.8V to 25V
评估板BD99954MWV EVK工作极限和最大值:


图3.评估板BD99954MWV EVK外形图

图4. 评估板BD99954MWV EVK电路图(1)

图5. 评估板BD99954MWV EVK电路图(2):USB-I2C
评估板BD99954MWV EVK材料清单:


USB-I2C材料清单:


图6. 评估板BD99954MWV EVK PCB布局图(1):顶层

图7. 评估板BD99954MWV EVK PCB设计图(2): GND内层1

图7. 评估板BD99954MWV EVK PCB设计图(2):PWR内层2

图8. 评估板BD99954MWV EVK PCB设计图(3):底层


 
 
 
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