TI 公司的bq24610/7是高度集成锂离子或离聚合体电池开关模式充电控制器,有固定频率的同步开关PWM控制器,高精度充电电流(±3%)和电压调整(±0.5%),充电预设置,充电终止,适配器电流调整和充电状态监视.输入电压从5V-28V/24V,充电电流高达10A.本文介绍bq24610/7主要特性,功能方框图,典型应用电路,输入滤波器以及评估板EVM主要特性,电路图和材料清单.
The bq24610/7 is highly integrated Li-ion or Li-polymer switch-mode battery charge controller. It offers a constant-frequency synchronous switching PWM controller with high accuracy charge current and voltage regulation, charge preconditioning, termination, adapter current regulation and charge status monitoring.
The bq24610/7 charges the battery in three phases: preconditioning, constant current, and constant voltage. Charge is terminated when the current reaches a minimum user-selectable level. A programmable charge timer provides a safety backup. The bq24610/7 automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a low-quiescent current sleep mode when the input voltage falls below the battery voltage.
bq24610/7主要特性:
600 kHz NMOS-NMOS Synchronous Buck Converter
Stand-alone Charger Support for Li-Ion or Li-Polymer
5V–28V VCC Input Operating Range and Support 1-6 Battery Cells (bq24610)
5V–24V VCC Input Operating Range and Support 1-5 Battery Cells (bq24617)
Up to 10A Charge Current and Adapter Current
High-Accuracy Voltage and Current Regulation
±0.5% Charge Voltage Accuracy
±3% Charge Current Accuracy
±3% Adapter Current Accuracy
Automatic System Power Selection from Adapter or Battery
Internal Loop Compensation
Internal Soft Start
Dynamic Power Management
Safety Protection
Input Over-Voltage Protection
Battery Thermistor Sense Hot/Cold Charge Suspend
Battery Detection
Reverse Protection Input FET
Programmable Safety Timer
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图1.bq24610/7功能方框图
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图2.bq24610/7典型应用电路图
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图3.bq24610/7输入滤波器
评估板EVM主要特性:
• Evaluation Module For bq2461x/bq2463x
• High Efficiency Synchronous Buck Charger
• User-programmable up to 26V Battery Voltage
• AC Adapter Operating Range 5 V–28 V
• LED Indication for Control and Status Signals.
• Test Points for Key Signals Available for Testing Purpose. Easy Probe Hook-up.
• Jumpers Available. Easy to Change Connections.
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图4.bq2461x/bq2463x EVM电路图
评估板EVM材料清单(BOM):
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