TPS25821DSSR - 1.5A USB Type-C Source Controller | Texas Instruments
料号： TPS25821DSSR ✓ 量产中TPS25821DSSR 概述
A USB Type-C source controller is an interface IC that manages the behavior of a USB Type-C port acting as a source. It detects attached USB Type-C equipment, advertises the available source behavior, establishes the power path, and coordinates the voltage and current available to the connected device. By integrating this function with a 1.5A power switch, the TPS25821DSSR reduces the number of separate components required in a compact USB Type-C power source.
Key features include a 1.5A power-switch rating, a 12-WSON package with an exposed pad, and an operating temperature range of -40°C to 125°C. Its 3 mm by 2 mm package supports space-constrained consumer, industrial, and accessory designs. Texas Instruments also identifies the device as a USB Type-C source controller suitable for supplying 5V at 1.5A, while also supporting legacy devices with dedicated charging protocol behavior.
The controller and integrated switch provide a functional partition between USB Type-C port management and protected power delivery. CC-pin handling determines source-role behavior, while the integrated power path limits the available output current to 1.5A. Designers still need to validate the complete Type-C system against the applicable USB Type-C specification, including advertising, cable orientation, current behavior, fault handling, and system power requirements.
Typical applications include USB Type-C adapters, USB Type-C docking accessories, portable charging products, industrial USB power adapters, and compact host ports that provide a controlled 5V source. The TPS25821DSSR is especially useful when board area is limited and integrating the source controller with the output switch offers a simpler implementation than using separate components.
For layout, place the input and output capacitors close to their associated power-switch pins, connect the exposed thermal pad to the ground plane, and keep USB Type-C signal and power routing compact. Validate thermal performance at the maximum continuous output current and ensure the external Type-C connector, cable, and supply are rated for the intended charging current.
This page consolidates verified manufacturer and distributor information, source-controller application context, pin-package constraints, and practical design guidance. It also distinguishes confirmed specifications from electrical details that still require consultation of the manufacturer datasheet and application notes.
直接替换替代料： TPS25821DSSR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TPS25821DSSR （相同外形与封装尺寸） ——差异在于 Package, VCONN Support.
TPS25820DSSR
✅ 直接替换联系询价
查看数据手册 →TPS25821DSSR 最大额定值与电气特性
| Product Type | USB Type-C source controller and power switch |
| Power-Switch Output Current | 1.5 A |
| Nominal Source Output Voltage | 5 V |
| USB Interface Generation | USB 2.0 and USB 3.1 |
| USB Connector Type | USB Type-C |
| 封装 | 12-WSON (DSS), 3 mm x 2 mm |
| 引脚数量 | 12 pins |
| Exposed Pad | Present |
| 安装类型 | Surface mount |
| Minimum Operating Temperature | -40°C |
| Maximum Operating Temperature | 125°C |
| Source Role | USB Type-C source controller |
| Output Power at 5 V and 1.5 A | 7.5 W |
| RoHS 状态 | Compliant |
| REACH Status | Compliant |
TPS25821DSSR 12-wson (dss), 3 mm x 2 mm 引脚配置指南
TPS25821DSSR（12-wson (dss), 3 mm x 2 mm 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： TPS25821DSSR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TPS25821DSSR 适用于 6 应用s: USB Type-C Power Adapter, Compact USB Type-C Docking Accessory, Legacy USB Charging Adapter, Industrial USB Type-C Power Port, Portable Charging Accessory, Powered USB Type-C Host Accessory.
USB Type-C Power Adapter
The TPS25821DSSR is well suited to a compact USB Type-C adapter because it combines source-role control with a 1.5A integrated power switch. Texas Instruments identifies the PMP40260 reference design as a USB Type-C adapter that can provide 5V at 1.5A and support legacy devices using DCP charging protocol behavior. The controller manages the Type-C source function while the switch controls the protected output path. This integration reduces board area in adapters where the 3 mm by 2 mm package is valuable. Designers should still select the input regulator, capacitors, connector, and protection components for the complete 5V power path, and should verify thermal performance while continuously sourcing 1.5A.
推荐
Compact USB Type-C Docking Accessory
A docking accessory can use the TPS25821DSSR to provide a controlled 5V source port alongside data or accessory functions. Its integrated 1.5A power switch simplifies the source-side implementation, while the 12-WSON package leaves additional board area for connector, protection, and interface circuitry. The -40°C to 125°C specified operating range supports designs expected to operate across broad industrial or commercial environmental conditions. Because the exposed pad provides a thermal path, the PCB should use an uninterrupted ground pour and adequate copper area. The connector, cable, and upstream supply must also support the intended current because the IC rating alone does not guarantee system-level charging performance.
推荐
Legacy USB Charging Adapter
The TPS25821 can be used in a USB Type-C adapter that also needs to support a legacy device with DCP charging protocol behavior, as described for the Texas Instruments PMP40260 reference design. The Type-C source controller establishes modern USB Type-C behavior, while the associated adapter circuitry can accommodate the legacy charging requirement. Its 1.5A power-switch capability provides a defined output-current ceiling for the 5V source path. In a mixed-compliance design, engineers should verify protocol timing, source advertisement, cable behavior, and charging-current negotiation against the applicable USB requirements rather than relying only on the nominal 1.5A switch rating.
推荐
Industrial USB Type-C Power Port
The TPS25821DSSR fits industrial equipment that exposes a USB Type-C port as a controlled 5V source. Its specified temperature range of -40°C to 125°C is a key fit factor for equipment operating across wide environmental conditions, and the integrated source controller and power switch reduce the number of discrete functional blocks. The 3 mm by 2 mm WSON package supports dense control boards. For industrial use, engineers should verify system-level ESD, surge, grounding, and fault-response requirements, as well as confirm whether the selected connector and enclosure can safely carry 1.5A continuously. The exposed pad should be soldered and connected to a low-impedance ground plane.
推荐
Portable Charging Accessory
A portable USB Type-C charging accessory benefits from the TPS25821DSSR because the controller and 1.5A power switch occupy a compact 12-WSON package. The device can organize the Type-C source connection and control the 5V output path in a space-constrained product. At the maximum nominal load, 5V and 1.5A correspond to 7.5W, so battery and upstream source capability must be checked separately. Thermal design should account for losses in the switch, connector contacts, and wiring rather than assuming the IC alone dissipates the entire system loss. An engineering sample should be evaluated with the intended cable and phone or tablet to confirm source advertising and current behavior.
推荐
Powered USB Type-C Host Accessory
The TPS25821DSSR can support a powered host accessory that needs a Type-C source port delivering a controlled 5V supply. Integrating the source controller with a 1.5A power switch allows the accessory to present a defined Type-C source behavior while keeping the implementation compact. The device is also useful where the powered accessory must interoperate with both modern Type-C equipment and legacy charging arrangements, subject to the additional circuitry required for legacy protocol support. Before release, verify compliance with the applicable USB Type-C requirements, test cold-plug and cable-orientation cases, and confirm that the host budget, connector, and PCB copper can sustain the selected operating current.
推荐
推荐产品汇总
工程参考数据： TPS25821DSSR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TPS25820DSSR |
|---|---|---|
| Package | 12-WSON (DSS), 3 mm x 2 mm | 12-WSON (DSS), 3 mm x 2 mm |
| Brand | Texas Instruments | Texas Instruments |
| Product Type | USB Type-C source controller and power switch | USB Type-C DFP controller |
关键差异点
- Integrated Type-C source control and power switching （对比 TPS25820DSSR)
- Compact 3 mm by 2 mm package （对比 TPS25820DSSR)
- Broad specified operating range （对比 TPS25820DSSR)
设计说明
Connect the exposed pad to a low-impedance ground plane and minimize thermal resistance through the PCB. At the nominal 5V and 1.5A operating point, the output power is 7.5W, but the heat generated inside the IC is the power-switch conduction loss rather than the full output power. Review the datasheet on-resistance, temperature derating, and shutdown limits, then verify the assembled design with the worst-case input voltage, load, ambient temperature, and copper area.
Place the input and output capacitors close to the corresponding power-switch pins to minimize parasitic inductance and preserve switching-edge performance. Provide a continuous ground reference beneath the device and thermal pad, and route the high-current path with wide copper and minimal loop area. The verified material did not include the manufacturer-recommended capacitor values, so those values must be taken directly from the TPS25820/TPS25821 datasheet rather than inferred from generic USB designs.
Do not equate the 1.5A switch rating with guaranteed 1.5A delivered to every attached device. The upstream source, USB Type-C cable, connector contacts, PCB tracks, and thermal conditions can all limit usable current. Also verify Type-C source advertisement, orientation handling, fault response, and legacy charging behavior in the final adapter. The verified evidence establishes the 5V and 1.5A application example, but it does not provide every timing or protection threshold.
合规信息
RoHS and REACH compliance are identified in the supplied TPS25821 comparison search results. No verified AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was supplied.
