TPS25840-Q1
- 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
- Functional Safety-Capable
- 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 (TPS25840-Q1 only)
- 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 TPS2584x-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 charge at optimal current and voltage even under heavy loads.
The TPS2584x-Q1 includes high bandwidth analog switches for DP and DM pass-through.
The TPS25840-Q1 also integrates short-to-battery protection on VBUS, DM_IN and DP_IN pins. These pins can withstand voltage up to 18 V. TPS25842-Q1 does not support data line (Dx) short-to-VBAT protection.
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 TPS2584x-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 TPS2584x-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 TPS2584x-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 TPS25840-Q1 includes high bandwidth analog switches for DP and DM pass-through, and support data line (Dx) short to VBAT protection. TPS25842-Q1 don’t support data line (Dx) short to VBAT protection.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TPS2584x-Q1 Automotive USB Type-A BC1.2 5-V 3.5-A Output, 36-V Input Synchronous Buck With Cable Compensation datasheet (Rev. E) | PDF | HTML | 2022/3/21 | ||
| 應用說明 | TPS25830, TPS25831-Q1, and TPS25840-Q1 Short-to-Battery Application (Rev. A) | PDF | HTML | 2023/6/2 | |||
| 證書 | TPS25840Q1EVM-079 EU Declaration of Conformity (DoC) | 2020/9/14 | ||||
| 功能安全資訊 | TPS2584x-Q1 Functional Safety FIT Rate and Failure Mode Distribution (Rev. A) | PDF | HTML | 2020/7/20 | |||
| 應用說明 | PCB Layout and Parameters Recommendation for TPS2583X EMC Performance | 2020/3/25 | ||||
| 應用說明 | How to Pass MFi Overcurrent Protection Test With USB Charger and Switch Device | PDF | HTML | 2020/2/26 | |||
| 應用說明 | How to Improve an Eye Diagram With the TPS25840-Q1 Device Using a Long USB Cable | 2020/1/10 | ||||
| 應用說明 | Ground Shift Phenomenon Recommendation of TPS2583x | PDF | HTML | 2019/12/2 | |||
| 應用說明 | Loop Characteristic Evaluation and Optimization of TPS2583x | PDF | HTML | 2019/12/2 |
設計與開發
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TPS25840Q1EVM-079 — 具有電纜補償和電流限制的 TPS25840-Q1 USB BC1.2 同步降壓評估模組
步驟 1：訂購硬體
- 另請索取 TPS25840-Q1 和 TPS25842-Q1樣品
步驟 3：下載設計指南行和應用說明
TPS25840Q1EVM-079 是適用於 USB Type A 5V 3.5A 輸出，以及具纜線補償的 36V 輸入同步降壓的評估模組 (EVM)。此 EVM 具有電源端子區塊和用於產品充電和數據通訊的 USB type-A 連接器。電纜補償、電流限制和切換頻率可透過 EVM 上的電阻器進行調整。
PMP40544 — 符合 3-m USB-IF 近端規範的車用 USB Type-A 充電器參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RHB) | 32 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。