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USB 电源开关和充电端口控制器

TPS25846-Q1

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具有客户端模式支持的 USB BC1.2 5V 3.5A 输出、36V 输入同步降压转换器

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TPS25846-Q1

正在供货
数据表 立即订购

产品详情

Product type Charge port converter Vin (min) (V) 4.5 Vin (max) (V) 36 Continuous current (max) (A) 3.5 Current limit (A) User Selectable Current Limit Operating temperature range (°C) -40 to 125 Enable Adjustable Enable Threshold Number of switches 1 Rating Automotive
Product type Charge port converter Vin (min) (V) 4.5 Vin (max) (V) 36 Continuous current (max) (A) 3.5 Current limit (A) User Selectable Current Limit Operating temperature range (°C) -40 to 125 Enable Adjustable Enable Threshold Number of switches 1 Rating Automotive
VQFN (RHB) 32 25 mm² 5 x 5
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
    • HBM ESD classification level H2
    • CDM ESD classification level C5
  • Synchronous buck DC/DC regulator
    • Input voltage range: 4.5 V to 36 V
    • Output current: 3.5 A
    • 5.1-V output voltage with ±1% accuracy
    • Current mode control
    • Adjustable frequency: 300 kHz to 2.2 MHz
    • Frequency synchronization to external clock
    • FPWM with spread-spectrum dithering
    • Internal compensation for ease of use
  • Compliant to USB-IF standards
    • CDP/SDP mode per USB BC1.2
  • Optimized for USB power and communication
    • User-programmable USB current limit
    • Cable droop compensation up to 1.5 V
    • High bandwidth data switches on DP and DM
    • Client mode for system update
  • Integrated protection
    • VBUS short-to-VBAT protection
    • DP_IN and DM_IN short-to-VBAT
    • DP_IN and DM_IN short-to-VBUS
    • DP_IN, DM_IN IEC 61000-4-2 rated
      • ±8-kV contact and ±15-kV air discharge
  • Fault flag reports
  • 32-pin QFN package with wettable flank
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
    • HBM ESD classification level H2
    • CDM ESD classification level C5
  • Synchronous buck DC/DC regulator
    • Input voltage range: 4.5 V to 36 V
    • Output current: 3.5 A
    • 5.1-V output voltage with ±1% accuracy
    • Current mode control
    • Adjustable frequency: 300 kHz to 2.2 MHz
    • Frequency synchronization to external clock
    • FPWM with spread-spectrum dithering
    • Internal compensation for ease of use
  • Compliant to USB-IF standards
    • CDP/SDP mode per USB BC1.2
  • Optimized for USB power and communication
    • User-programmable USB current limit
    • Cable droop compensation up to 1.5 V
    • High bandwidth data switches on DP and DM
    • Client mode for system update
  • Integrated protection
    • VBUS short-to-VBAT protection
    • DP_IN and DM_IN short-to-VBAT
    • DP_IN and DM_IN short-to-VBUS
    • DP_IN, DM_IN IEC 61000-4-2 rated
      • ±8-kV contact and ±15-kV air discharge
  • Fault flag reports
  • 32-pin QFN package with wettable flank

The TPS25846-Q1 is a USB Type-A BC1.2 charging solution that includes a synchronous DC/DC converter. With cable droop compensation, the Vbus voltage remains constant regardless of load current, ensuring connected portable devices are charged at optimal current and voltage even under heavy loads.

The TPS25846-Q1 includes high bandwidth analog switches for DP and DM pass-through. The device also integrates short to battery protection on VBUS, DM_IN and DP_IN pins. These pins can withstand voltage up to 18 V.

The synchronous buck regulator operates with current mode control and is internally compensated to simplify design. A resistor on the RT pin sets the switching frequency between 300 kHz and 2.2 MHz. Operating below 400 kHz results in better system efficiency. Operation above 2.1 MHz avoids the AM radio bands and allows for use of a smaller inductor.

The TPS25846-Q1 integrates electrical signatures necessary for legacy devices which use USB data lines to determine charging configuration.

A precision current sense amplifier is included for user programmable cable droop compensation and current limit tuning. Cable compensation aids portable devices in charging at optimum current and voltage under heavy loads by changing the buck regulator output voltage linearly with load current to counteract the voltage drop due to wire resistance in automotive cabling. The VBUS voltage measured at a connected portable device remains approximately constant, regardless of load current, allowing the portable device’s battery charger to work optimally.

The USB specifications require current limiting of USB charging ports, but give system designers reasonable flexibility to choose overcurrent protection levels based on system requirements. The TPS25846-Q1 uses a novel two-threshold current limit circuit allowing system designers to either program average current limit protection of the buck regulator, or optionally, current limit using an external NMOS between the CSN/OUT and BUS pins. The NFET implementation enables the TPS25846-Q1 buck regulator to supply a 5-V output for other loads during an overcurrent condition on the USB port.

Protection features include cycle-by-cycle current limit, hiccup short-circuit protection, undervoltage lockout, VBUS overvoltage and overcurrent, data line (Dx) short to VBUS, and die overtemperature protection.

The TPS25846-Q1 includes high bandwidth analog switches for DP and DM pass-through, and support data line (Dx) short-to-VBAT protection.

The TPS25846-Q1 is a USB Type-A BC1.2 charging solution that includes a synchronous DC/DC converter. With cable droop compensation, the Vbus voltage remains constant regardless of load current, ensuring connected portable devices are charged at optimal current and voltage even under heavy loads.

The TPS25846-Q1 includes high bandwidth analog switches for DP and DM pass-through. The device also integrates short to battery protection on VBUS, DM_IN and DP_IN pins. These pins can withstand voltage up to 18 V.

The synchronous buck regulator operates with current mode control and is internally compensated to simplify design. A resistor on the RT pin sets the switching frequency between 300 kHz and 2.2 MHz. Operating below 400 kHz results in better system efficiency. Operation above 2.1 MHz avoids the AM radio bands and allows for use of a smaller inductor.

The TPS25846-Q1 integrates electrical signatures necessary for legacy devices which use USB data lines to determine charging configuration.

A precision current sense amplifier is included for user programmable cable droop compensation and current limit tuning. Cable compensation aids portable devices in charging at optimum current and voltage under heavy loads by changing the buck regulator output voltage linearly with load current to counteract the voltage drop due to wire resistance in automotive cabling. The VBUS voltage measured at a connected portable device remains approximately constant, regardless of load current, allowing the portable device’s battery charger to work optimally.

The USB specifications require current limiting of USB charging ports, but give system designers reasonable flexibility to choose overcurrent protection levels based on system requirements. The TPS25846-Q1 uses a novel two-threshold current limit circuit allowing system designers to either program average current limit protection of the buck regulator, or optionally, current limit using an external NMOS between the CSN/OUT and BUS pins. The NFET implementation enables the TPS25846-Q1 buck regulator to supply a 5-V output for other loads during an overcurrent condition on the USB port.

Protection features include cycle-by-cycle current limit, hiccup short-circuit protection, undervoltage lockout, VBUS overvoltage and overcurrent, data line (Dx) short to VBUS, and die overtemperature protection.

The TPS25846-Q1 includes high bandwidth analog switches for DP and DM pass-through, and support data line (Dx) short-to-VBAT protection.
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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 TPS25846-Q1 汽车类 USB Type-A 和 BC1.2 5V、3.5A 输出、36V 输入同步 数据表 (Rev. B) 2022年 3月 21日
功能安全信息 TPS25846-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021年 2月 24日
证书 TPS25846Q1EVM-117 EU Declaration of Conformity (DoC) (Rev. A) 2020年 8月 11日
用户指南 TPS25846-Q1 Evaluation Module 2020年 5月 18日
应用手册 How to Improve an Eye Diagram With the TPS25840-Q1 Device Using a Long USB Cable 2020年 1月 10日
应用手册 Ground Shift Phenomenon Recommendation of TPS2583x PDF | HTML 2019年 12月 2日

设计和开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

TPS25846Q1EVM-117 — TPS25846-Q1 具有电缆补偿和客户端模式的 USB BC1.2 同步降压转换器评估模块

TPS25846Q1EVM-117 是适用于 USB Type-A 5V 3.5A 输出、36V 输入同步降压器件的评估模块 (EVM)，具有电缆补偿功能。该 EVM 具有电源端子块和 USB Type-A 连接器，可进行器件充电和数据通信。电缆补偿、电流限制和开关频率可通过该 EVM 上的电阻器进行调节。
用户指南: PDF
TI.com 上无现货
仿真模型

TPS25830-Q1 PSPICE Transient Ecrypted Model

SLVMD42.ZIP (203 KB) - PSpice Model
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参考设计

PMP40725 — CISPR 25 5 类 400kHz 额定 12W 汽车级 USB A 型 充电器参考设计

此参考设计对 EMI 进行了优化，适用于具有 12W 单输出的汽车类 USB Type-A 充电器。TPS25846-Q1 可用作直流/直流稳压器和端口控制器。开关频率为 400kHz。前端滤波器和 PCB 布局经设计优化，符合严格的 CISPR 25 5 类传导电磁干扰 (EMI) 标准。此参考设计已通过 CISPR 25 5 类传导 EMI 标准测试，可缩短设计时间。
测试报告: PDF
原理图: PDF
封装 引脚 CAD 符号、封装和 3D 模型
VQFN (RHB) 32 Ultra Librarian
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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