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| TBC03锂电池充电器解决方案 |
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| 文章来源：永阜康科技 更新时间：2018/6/12 9:23:00 |
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ST公司的TBC03是具有低静态电流的LDO稳压器和负载开关的锂电池充电器,包括150mA LDO,2个SPDT负载开关,以及保护电路模块(PCM),采用CC/CV算法进行充电电池,快速充电电流高达650mA,预充电电流从1mA起,可调浮电压高达4.45V,主要用在智能手表和可穿戴设备,健身和医疗设备,以及锂电池和其它Li-Poly电池可再充电设备.本文介绍了TBC03主要特性,框图,应用电路图及其材料清单,Li-Ion/Li-Po电池电源管理评估板STEVAL-ISB035V1主要特性,电路图,材料清单和PCB设计图.
The STBC03 is a highly integrated power management, embedding a linear batterycharger, a 150 mA LDO, 2 SPDT load switches, and a protection circuit module(PCM) to prevent the battery from being damaged under fault conditions.
The STBC03 uses a CC/CV algorithm to charge the battery; the fast charge and the pre-charge current can be both independently programmed using dedicatedresistors. The termination current is set to 5% of the programmed fast charge current,but has fixed values for fast charge currents lower than 20 mA. The battery floatingvoltage value is programmable and can be set to a value up to 4.45 V.
The STBC03 also features a charger enable input to stop the charging processanytime.The STBC03 is automatically powered off from the connected battery when the IN pinis not connected to a valid power source (battery mode).A battery under/overtemperature condition can be detected by using an externalcircuitry (NTC thermistor).
The STBC03 draws less than 10 nA from the connected battery in shipping modeconditions, so to maximize the battery life during shelf life of the final application. Thedevice is available in the Flip Chip 30 package.
TBC03主要特性:
• Charges single-cell Li-Ion batteries with CC/CV algorithm and chargetermination
• Fast charge current up to 650 mA adjustable by external resistor
• Pre-charge current from 1 mA
• Adjustable floating voltage up to 4.45 V
• Integrated low quiescent LDO regulator
• Automatic power path management
• Auto-recharge function
• Embedded protection circuit module (PCM) featuring battery overcharge, batteryover-discharge and battery overcurrent protections
• Charging timeout
• Shipping mode feature allows battery low leakage when over-discharged
• Very low battery leakage in over-discharge and shutdown mode
• Charger enable input
• Charge/fault status output
• Battery voltage pin to allow external gauging
• Two 3 Ω SPDT load switches
• Available in Flip Chip 30, 400 μm pitch package
• Rugged ±4 kV HBM, ESD protection on the most critical pins
TBC03应用:
• Smart watches and wearable devices
• Fitness and medical accessories
• Li-Ion and other Li-Poly battery rechargeable equipment
图1.TBC03框图
图2.TBC03应用电路图
TBC03应用电路图材料清单:
基于STBC03的Li-Ion/Li-Po电池电源管理评估板STEVAL-ISB035V1
The STEVAL-ISB035V1 is an evaluation board based on the STBC03 battery power management IC, integrating a linearcharger for single-cell Li-Ion batteries with battery protection functions, an LDO regulator and two SPDT load switches.
The device uses a CC-CV algorithm to charge the battery; the fast-charge and pre-charge currents can be programmed usingan external resistor.
The input supply voltage is used to charge the battery and provide power to the LDO regulator. When a valid input voltage is notpresent and the battery is not empty, the device automatically switches to battery power.
When shutdown mode is activated, battery power consumption falls to less than 100 nA.
Two 3-Ω SPDT load switches with dedicated control input are embedded to intelligently manage overall system powerconsumption. The STEVAL-ISB035V1 can work in standalone mode, but several digital inputs can be used to control theSTBC03 for full operation.
The STEVAL-ISB035V1 evaluation board provides full access to STBC03 functions through header connectors and can besupplied through a micro-AB USB connector.
图3.评估板STEVAL-ISB035V1外形图
The STEVAL-ISB035V1 evaluation board size is 50 mm x 50 mm.
The PCB is made by using FR4 glass epoxy support with 4 copper layers.
评估板STEVAL-ISB035V1主要特性:
• Charges single-cell Li-Ion/Li-Po batteries with CC-CV algorithm and charge termination
• Fast charge current programmable from 1 mA to 650 mA
• Pre-charge current programmable from 1 mA to 650 mA
• Adjustable floating voltage up to 4.45 V
• Integrated always-ON low quiescent LDO regulator
• Battery overcharge and over-discharge protections
• Overcurrent protection
• Shipping mode entry and exit inputs
• Integrated dual 3 Ω SPDT load switches
• Digital control inputs
• RoHS compliant
图4.评估板STEVAL-ISB035V1电路图
评估板STEVAL-ISB035V1材料清单:
图5.评估板STEVAL-ISB035V1 PCB设计图(1):顶层
图6.评估板STEVAL-ISB035V1 PCB设计图(2):底层
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