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USB-A 控制器

TPS25846-Q1

現行

具有用戶端模式支援的 USB BC1.2 5-V 3.5-A 輸出、36-V 輸入同步降壓轉換器

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產品規格表

TPS25846-Q1

現行
產品規格表 立即訂購

產品詳細資料

Product type Charge port converter Vin (max) (V) 36 Vin (min) (V) 4.5 Continuous current (max) (A) 3.5 Current limit (A) User Selectable Current Limit Number of switches 1 Enable Adjustable Enable Threshold Rating Automotive Operating temperature range (°C) -40 to 125
Product type Charge port converter Vin (max) (V) 36 Vin (min) (V) 4.5 Continuous current (max) (A) 3.5 Current limit (A) User Selectable Current Limit Number of switches 1 Enable Adjustable Enable Threshold Rating Automotive Operating temperature range (°C) -40 to 125
VQFN (RHB) 32 25 mm² (5 mm × 5 mm)
  • 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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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 TPS25846-Q1 Automotive USB Type-A BC1.2 5-V 3.5-A Output, 36-V Input Synchronous datasheet (Rev. B) PDF | HTML 2022/3/21
功能安全資訊 TPS25846-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021/2/24
證書 TPS25846Q1EVM-117 EU Declaration of Conformity (DoC) (Rev. A) 2020/8/11
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

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

TPS25846Q1EVM-117 — 具有電纜補償和用戶端模式的 TPS25846-Q1 USB BC1.2 同步降壓評估模組

TPS25846Q1EVM-117 是適用於 USB type-A 5-V 3.5-A 輸出以及具纜線補償的 36-V 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。
使用指南: PDF
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模擬型號

TPS25830-Q1 PSPICE Transient Ecrypted Model

SLVMD42.ZIP (203 KB) - PSpice 模型
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參考設計

PMP40725 — CISPR 25 Class 5 400-kHz 額定值 12 W 汽車 USB Type-A 充電器參考設計

此參考設計是一款 EMI 最佳化設計，適用於具有單 12-W 輸出的汽車 USB Type-A 充電器。TPS25846-Q1 可用作 DC-DC 穩壓器和連接埠控制器。切換頻率設為 400 kHz。前端濾波器設計與 PCB 佈線圖經過最佳化，符合嚴格的 CISPR 25 第 5 級傳導電磁干擾 (EMI) 標準。此參考設計已通過測試符合 CISPR 25 第 5 級傳導 EMI 標準，可加快設計時間。
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VQFN (RHB) 32 Ultra Librarian
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