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CONSONANCE CN3142
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CONSONANCE CN3142
- Type
- CONSONANCE
- Minimum package
- 3000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CONSONANCE
- Electronic Component
- CN3142
- Electronic Component
- 1
- Package
- SOT-23-6
- Electronic Component
- Battery Management
- Electronic Component
- 0.028g
- Electronic Component
- 1
- Features
- Programmable Current
- Electronic Component
- BM0257674199
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 4.5V~6V
- Battery Type
- Battery
- Battery
- 1
- ICType
- IC
- 0VBattery
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
CN3142 产品概述
一、产品简介
CN3142（品牌：CONSONANCE / 上海如韵）是一款面向单节锂电池的充电管理芯片，封装为SOT-23-6，适用于便携、低功耗电源管理场景。芯片输入工作电压范围为4.5V至6V，支持0V电池唤醒充电与电池温度检测（NTC），采用恒流-恒压（CC/CV）充电策略，充电饱和电压为4.20V，最大充电电流可达400mA，静态电流（Iq）极低，仅约3μA，工作温度范围为-40℃至+85℃。
二、主要性能要点
- 工作电压：4.5V ~ 6V，适配常见单节锂电池充电器输入（如USB 5V）
- 充电电流：最大支持400mA（可通过外部设定电阻调整）
- 充电终止电压：4.20V（典型锂电池满充电压）
- 0V电池充电：支持，在电池电压为0V时可进行预充/唤醒
- 电池温度检测：支持NTC温度监测，满足安全充电条件判断
- 低静态电流：Iq ≈ 3μA，适合对待机功耗要求高的便携设备
- 封装：SOT-23-6，便于小体积PCB布局与批量生产
三、功能与工作方式
CN3142通常以线性充电架构实现CC/CV充电流程：充电初期提供恒定电流（由外部电阻或内部设定决定，最大400mA），当电压上升至4.2V时转为恒压充电直至充电电流降至终止阈值。支持对完全放电至0V的电池进行预充，以安全条件下将电池唤醒至正常充电电压。内置电池温度检测接口，可接NTC以判断电池是否在允许温度范围内充电。
四、典型应用场景
- 小型USB充电设备（蓝牙耳机、低功耗可穿戴设备）
- 便携式传感器、电表与遥控器等单节锂电池供电的终端
- 小型充电模块与备用电源管理方案
五、设计注意事项与建议
- 充电电流设定：若需小于最大值，可通过外部设定电阻或按照芯片手册推荐连接方式来调整。
- 散热与功耗：线性充电器的功耗为(VIN - VBAT) × ICHG，举例：VIN=5V，VBAT=3.7V，ICHG=400mA，则耗散功率≈(5-3.7)×0.4=0.52W，SOT-23-6需关注PCB铜箔与散热布局以避免过热。
- 外围元件：建议在输入端与电池端放置适当的陶瓷电容以稳定电压，电池温度检测接NTC并按规定阻值选择分压网络。
- PCB 布局：电流回路走线尽量粗短，输入电容靠近芯片VIN/GND引脚放置，NTC及指示LED走线避开高噪声信号线。
- 安全保护：芯片自身提供基本控制功能，但建议配合独立电池保护电路（过充/过放/短路保护）以提高系统可靠性。
六、封装与可靠性
SOT-23-6小型封装适合空间受限的产品设计，工作温度范围-40℃~+85℃可满足工业级与消费级大多数工况。针对高温或高充电功率场合，应在PCB设计中增大散热能力或限制充电电流以保证长期可靠性。
七、总结
CN3142为单节锂电池提供一套低功耗、功能完备的充电解决方案，支持0V电池唤醒和温度监测，最大充电电流400mA，低静态电流3μA，封装SOT-23-6，适合中低功耗便携类产品。在设计中需关注线性充电带来的热耗散，合理选取外围器件并配合电池保护电路以保证安全与可靠性。若需进一步的典型电路、引脚定义或热设计建议，可提供具体应用场景以便给出更精准的设计指导。
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