详细说明
车充识别芯片 旅充识别芯片 USB识别CX1901 CX1901A/CX2901A是USB充电协议端口控制IC，可自动识别充电设备类型，并通过对应的usb充电协议与设备握手，使之获得最大充电电流，在保护充电设备的前提下节省充电时间。应用范围:移动电源、便携式充电器、车载充电器等。
车充识别芯片 旅充识别芯片 USB识别CX1901 2.特性
工作电压:4.5V～5.5V
支持多种USB充电协议，各充电协议自动切换，包括:Divider1/Divider2/Divider3充电协议（苹果专用）D+/D–置1.2V模式（三星专用）BC1.2 DCP及CTIS YD/T 1591-2009充电协议可靠的上电复位(POR)及低压复位(LVR)性能
车充识别芯片 旅充识别芯片 USB识别CX1901 封装形式:SOT23-5、SOT23-6封装引脚示意图
图 1 引脚示意图
表 1 引脚描述表
| | 引脚名称 | | CX1901 | CX2901 | I/O | 功能描述 | |
| | | | | | | | |
| | DP1 | | 4 | 1 | I/O | 连接至第一组 USB 端口DP | |
| | GND | | 2 | 2 | P | 负电源 | |
| | CB | | 1 | - | I | Divider1/2 及 Divider3 配置位 | |
| | DP2 | | - | 3 | I/O | 连接至第二组 USB 端口DP | |
| | DM2 | | - | 4 | I/O | 连接至第二组 USB 端口DM | |
| | VDD | | 3 | 5 | P | 正电源 | |
| | DM1 | | 5 | 6 | I/O | 连接至第一组 USB 端口DM | |
| | I:CMOS输入 | | | O:推挽型CMOS输出 | |
| | I/O:CMOS输入/输出 | | P:电源/地 | |
| | | | | | | |
| | | | | | 3/8 页 | 10/24/2014 |
| | 深圳市诚芯微科技有限公司 | | | | | | | | CX1901/CX2901 |
| | | 4.定购信息 | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | CX X90X X | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | 空 | :支持Divider1/2 USB充电协议（仅针对 CX2901 | ） | | | | |
| | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | A | :支持Divider3 USB充电协议（仅针对 CX2901A | ） | | | | |
| | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | 1 | :支持单路USB充电协议端口 | | | | | | | | | |
| | | 表 2 | 定购信息 | | | | | | | 2 :支持双路USB充电协议端口 | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | 产品型号 | | | 产品封装 | | | | | | | 包装/数量 | | | | | 产品印章 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | CX1901 | | | SOT23-5L | | | | Tape and Reel / 3000 units | | | | CX1901 |
| | | | | | | | | | | | Wxxxx |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | CX2901 | | | SOT23-6L | | | | Tape and Reel / 3000 units | | | | CX2901 |
| | | | | | | | | | | | Wxxxx |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | CX2901A | | | SOT23-6L | | | | Tape and Reel / 3000 units | | | | CX2901A |
| | | | | | | | | | | | Wxxxx |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | 注: CX1901 通过CB脚配置为Divider1/2或Divider3协议，具体见5.2描述。 | | | | | | | |
| | | 5.功能描述 | | | | | | | | | | | | | | | | | | | | | | | | | |
| 5.1 | 版本简述 | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | 表 3 各型号对应支持的USB协议: | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | USB端子 | | | USB端子 | | | | | | CX1901 | | | CX1901 |
| | | | | | NO. | | | | | DP/DM | | | | | | | | 功率 | | | （CB=1） | | | （CB=0） |
| | | | | | | | | | | | | D+ | | | D- | | | | | CX2901 | | | CX2901A |
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | USB | | 1 | | | | | Divider 1 | | | 2.0 | | 2.7 | | | 5W | | 支持(*) | | | 不支持 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | 充电 | | 2 | | | | | Divider 2 | | | 2.7 | | 2.0 | | | 10W | | 支持(*) | | | 不支持 |
| | | 协议 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | 3 | | | | | Divider 3 | | | 2.7 | | 2.7 | | | 12W | | 不支持 | | | 支持 |
| | | 支持 | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | 4 | | | | | D+/D-置1.2V | | | 1.2 | | 1.2 | | | | | | 支持 | | | 支持 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | 5 | | | | | BC1.2 DCP | | | | 短接 | | 短接 | | 5W | | 支持 | | | 支持 |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | 6 | | | CTIS YD/T 1591-2009 | | | 短接 | | 短接 | | 5W | | 支持 | | | 支持 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |