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TPS3850-Q1

現行

具窗口看門狗定時器和可編程延遲且適用 OV 和 UV 監控的車用窗口看門狗

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產品規格表

TPS3850-Q1

現行
產品規格表 立即訂購

產品詳細資料

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 0.4, 0.864, 0.9, 0.936, 1.116, 1.152, 1.248, 1.284, 1.674, 1.8, 1.926, 2.325, 2.4, 2.6, 2.675, 3, 3.069, 3.168, 3.432, 3.531, 4.65, 5 Features Reset time delay, Separate VDD & sense, Timeout watchdog, Undervoltage and overvoltage monitor, Watchdog disable, Watchdog timer, Window watchdog Reset threshold accuracy (%) 1 Iq (typ) (mA) 0.01 Output driver type/reset output Active-low, Open-drain Time delay (ms) 10, 200 Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 125
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 0.4, 0.864, 0.9, 0.936, 1.116, 1.152, 1.248, 1.284, 1.674, 1.8, 1.926, 2.325, 2.4, 2.6, 2.675, 3, 3.069, 3.168, 3.432, 3.531, 4.65, 5 Features Reset time delay, Separate VDD & sense, Timeout watchdog, Undervoltage and overvoltage monitor, Watchdog disable, Watchdog timer, Window watchdog Reset threshold accuracy (%) 1 Iq (typ) (mA) 0.01 Output driver type/reset output Active-low, Open-drain Time delay (ms) 10, 200 Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 125
VSON (DRC) 10 9 mm² 3 x 3
  • AEC-Q100 Qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Functional Safety-capable
  • Input voltage range: VDD = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy (Maximum)
  • Low supply current: IDD = 10 µA (typical)
  • User-programmable watchdog timeout
  • User-programmable reset delay
  • Factory programmed precision watchdog and reset timers
  • Open-drain outputs
  • Precision over- and undervoltage monitoring:
    • Supports common rails from 0.9 V to 5.0 V
    • 4% and 7% Fault windows available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Available in a small 3-mm × 3-mm, 10-Pin VSON package
  • AEC-Q100 Qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Functional Safety-capable
  • Input voltage range: VDD = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy (Maximum)
  • Low supply current: IDD = 10 µA (typical)
  • User-programmable watchdog timeout
  • User-programmable reset delay
  • Factory programmed precision watchdog and reset timers
  • Open-drain outputs
  • Precision over- and undervoltage monitoring:
    • Supports common rails from 0.9 V to 5.0 V
    • 4% and 7% Fault windows available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Available in a small 3-mm × 3-mm, 10-Pin VSON package

The TPS3850-Q1 combines a precision voltage supervisor with a programmable window watchdog timer. The TPS3850-Q1 window comparator achieves 0.8% accuracy (–40°C to +125°C) for both overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) thresholds on the SENSE pin. The TPS3850-Q1 also includes accurate hysteresis on both thresholds, making the device ideal for use with tight tolerance systems. The supervisor RESET delay can be set by factory-programmed default delay settings, or programmed by an external capacitor. The factory-programmed RESET delay features a 9.5% accuracy, high-precision delay timing.

The TPS3850-Q1 includes a programmable window watchdog timer for a wide variety of applications. The dedicated watchdog output ( WDO) enables increased resolution to help determine the nature of fault conditions. The window watchdog timeouts can be set by factory-programmed default delay settings, or programmed by an external capacitor. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3850-Q1 is available in a small 3.00-mm × 3.00-mm, 10-pin VSON package. The TPS3850-Q1 features wettable flanks for easy optical inspection.

The TPS3850-Q1 combines a precision voltage supervisor with a programmable window watchdog timer. The TPS3850-Q1 window comparator achieves 0.8% accuracy (–40°C to +125°C) for both overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) thresholds on the SENSE pin. The TPS3850-Q1 also includes accurate hysteresis on both thresholds, making the device ideal for use with tight tolerance systems. The supervisor RESET delay can be set by factory-programmed default delay settings, or programmed by an external capacitor. The factory-programmed RESET delay features a 9.5% accuracy, high-precision delay timing.

The TPS3850-Q1 includes a programmable window watchdog timer for a wide variety of applications. The dedicated watchdog output ( WDO) enables increased resolution to help determine the nature of fault conditions. The window watchdog timeouts can be set by factory-programmed default delay settings, or programmed by an external capacitor. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3850-Q1 is available in a small 3.00-mm × 3.00-mm, 10-pin VSON package. The TPS3850-Q1 features wettable flanks for easy optical inspection.
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類型 標題 日期
* Data sheet TPS3850-Q1 Precision Voltage Supervisor with Programmable Window Watchdog Timer datasheet (Rev. B) PDF | HTML 2021年 5月 20日
White paper Designing a Power Supply for a Safety MCU to Meet Functional Safety ASIL B PDF | HTML 2023年 11月 15日
Functional safety information TPS3850-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 2021年 5月 17日
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 2019年 6月 28日
Technical article How voltage references and supervisors help achieve ASIL functional safety goals PDF | HTML 2019年 5月 10日
Technical article How diagnostics help your ADAS design achieve higher levels of functional safety PDF | HTML 2019年 5月 6日

設計與開發

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開發板

TPS3850EVM-781 — 具有視窗看門狗計時器的 TPS3850 高準確度監控器評估模組

The TPS3850EVM-781 evaluation module (EVM) is designed for a typical configuration to evaluate the operation and performance of the TPS3850 low-quiescent current (Iq), 0.8% accurate supervisor with integrated watchdog timer.
使用指南: PDF
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模擬型號

TPS3850 PSpice Transient Model (Rev. A)

SBVM649A.ZIP (67 KB) - PSpice Model
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模擬型號

TPS3850 Unencrypted PSpice Transient Model (Rev. A)

SBVM648A.ZIP (9 KB) - PSpice Model
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

在 PSpice for TI 設計與模擬工具中，您可以搜尋 TI (...)
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參考設計

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PMP22650 參考設計為 6.6-kW 雙向車載充電器。此設計採用雙相圖騰柱 PFC 與具同步整流的全橋 CLLLC 轉換器。CLLLC 利用頻率和相位調變來調節所需調節範圍內的輸出。此設計在 TMS320F28388D 微控制器中使用單一處理核心，以控制 PFC 和 CLLLC 二者。同步整流可透過與 Rogowski 線圈電流感測器相同的微控制器實作。透過使用高速 GaN 開關 (LMG3522) 可實現高密度。PFC 以 120 kHz 運作，CLLLC 則以 200 kHz 至 800 kHz 的可變頻率運作。開放訊框功率密度 3.8 kW/L 實現 96.5% (...)
Test report: PDF
電路圖: PDF
參考設計

PMP31273 — 適用於具有監控器和監控系統之 C2000™ MCU 的車用雙降壓轉換器參考設計

此參考設計是靈活且精巧的電源供應器，可提供 5-V 和 3.3-V 輸出軌，以為 C2000™ MCU 供電。設計包括兩個 LMR34206-Q1 超小型同步降壓轉換器裝置，以及一個具可編程窗型監視計時器的 TPS3850-Q1 精密電壓監控器。此外還增添了單一 SN74LVC2G74-Q1 D 型正反器，以提供監視系統與 C2000™ MCU 啟動行為的相容性。
Test report: PDF
參考設計

TIDA-050008 — 具改善電壓監控的 ADAS 電源參考設計

This automotive power reference design supports additional precision voltage supervision and window watchdog for safety MCUs in advanced driver assistance systems (ADAS). These ADAS systems can control driving functions, such as automated emergency brake, lane keep assist and adaptive cruise (...)
Design guide: PDF
電路圖: PDF
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