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CONSONANCE CN3703
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CONSONANCE CN3703
- Type
- CONSONANCE
- Minimum package
- 4000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CONSONANCE
- Electronic Component
- CN3703
- Electronic Component
- 1
- Package
- TSSOP-16
- Electronic Component
- Battery Management
- Electronic Component
- 0.198g
- Electronic Component
- 1
- Features
- Programmable Current
- Electronic Component
- BM0226176177
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 7.5V~28V
- Battery Type
- Battery
- Battery
- 3
- ICType
- IC
- Static Current(Iq)
- 14uA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
CN3703 产品概述
一、产品简介
CN3703 是上海如韵（CONSONANCE）面向三节锂离子/锂聚合物电池组的充电管理芯片，采用 TSSOP-16 封装。器件集成电池充电控制与多种保护功能，支持电池温度检测，适用于车载、工业和便携电源等需要对 3 节电池进行精准充电的场景。器件工作可靠、静态电流低，便于系统待机功耗控制。
二、主要性能参数
- 电池节数：3 节（串联）
- 工作电压范围：7.5V ~ 28V（适配 12V/24V 电源）
- 最大充电电流：5A（外部元件需要匹配）
- 充电饱和电压（满充电压）：12.6V（3×4.2V）
- 静态电流（Iq）：14 μA（低功耗待机特性）
- 工作温度范围：-40℃ ~ +85℃
- 电池温度检测：支持（外接 NTC 热敏电阻）
- 封装：TSSOP-16
- 芯片类型：充电管理芯片（需配合外部 MOSFET、电流检测元件等构成完整充电电路）
三、充电策略与控制要点
CN3703 支持常见的 CC（恒流）- CV（恒压）两段充电流程：当电池电压低于预设阈值时进入预充或恒流阶段，电流逐步上升至设定最大值（最多 5A），当电池电压接近 12.6V 时转入恒压阶段，直到充电电流降低至终止阈值后停止充电或进入涓流/维护模式。终止电流、保护门限和定时器通常由外部元件或寄存器配置决定，具体选型应参考电池厂商推荐充电曲线并通过外部电阻/电路调整。
四、保护与温度管理
芯片内置并可配合外部实现常见保护功能：过充保护、过流/短路保护、过温/欠温保护以及电池温度检测（通过外接 NTC）。电池温度检测用于禁止在危险温度范围内充电或触发降额充电，以延长电芯寿命并保证安全。对于电芯均衡需求，可配合外部均衡电路或 BMS 实现多节均衡管理。
五、系统设计与布局建议
- 电源输入滤波：输入端加足够的去耦电容（低 ESR）以抑制瞬态与噪声。
- 电流检测：选用合适阻值与功率等级的分流电阻，并靠近芯片布置以提高测量精度。
- 功率器件：若为大电流应用，外部 MOSFET 需满足导通电阻与散热要求，必要时并排大面积铜箔散热。
- 温度传感：NTC 位置应贴近电池组以获得准确温度读数。
- PCB 布局：TSSOP-16 的热焊盘与周围大面积铜箔相连以提升散热；关键信号线短且粗，地线采用完整回流层，防止噪声干扰。
六、典型应用场景
适用于三节锂电池充电器、便携式电源、工业控制备电、UPS 小型电源、专业测量仪器等需要 12.6V 充电管理且充电电流可达数安培的设备。
七、封装与品牌信息
封装形式：TSSOP-16，便于中高密度 PCB 设计与生产。品牌：CONSONANCE（上海如韵）。在设计与量产前建议索取器件原厂数据手册与参考设计，以确认所有门限、引脚功能及外设接口细节，按电池厂商建议完成充电参数配置与安全验证。
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