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TPS92691-Q1

現行

具有軌對軌電流感測放大器的汽車多拓撲 LED 驅動器

產品詳細資料

Number of channels 1 Topology Boost Controller, Buck Controller, Buck-Boost Controller, Cuk Controller, Flyback Controller, SEPIC Controller Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 4.5 Vin (max) (V) 65 Vout (min) (V) 3 Vout (max) (V) 65 Iout (max) (A) 5 Iq (typ) (mA) 1.5 Switching frequency (max) (kHz) 1000 Features Adjustable Switch Frequency, Synchronization Pin, Thermal shutdown
Number of channels 1 Topology Boost Controller, Buck Controller, Buck-Boost Controller, Cuk Controller, Flyback Controller, SEPIC Controller Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 4.5 Vin (max) (V) 65 Vout (min) (V) 3 Vout (max) (V) 65 Iout (max) (A) 5 Iq (typ) (mA) 1.5 Switching frequency (max) (kHz) 1000 Features Adjustable Switch Frequency, Synchronization Pin, Thermal shutdown
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • Wide Input Voltage: 4.5 V to 65 V
  • Wide Output Voltage Range: 2 V to 65 V
  • Low Input Offset Rail-to-Rail Current Sense Amplifier
    • Better than ±3% LED Current Accuracy over 25°C to 140°C Junction Temperature Range
    • Compatible With High-Side and Low-Side Current Sense Implementations
  • High-Impedance Analog LED Current Adjust Input (IADJ) With over 15:1 Contrast Ratio
  • Over 1000:1 Series FET PWM Dimming Ratio With Integrated Series N-Channel Dim Driver Interface
  • Continuous LED Current Monitor Output for System Fault Detection and Diagnoses
  • Programmable Switching Frequency With External Clock Synchronization Capability
  • Programmable Soft-Start and Slope Compensation
  • Comprehensive Fault Protection Circuitry Including VCC Undervoltage Lockout (UVLO), Output Overvoltage Protection (OVP), Cycle-by-Cycle Switch Current Limit, and Thermal Protection
  • TPS92691-Q1: Automotive Q100 Grade 1 Qualified
  • Wide Input Voltage: 4.5 V to 65 V
  • Wide Output Voltage Range: 2 V to 65 V
  • Low Input Offset Rail-to-Rail Current Sense Amplifier
    • Better than ±3% LED Current Accuracy over 25°C to 140°C Junction Temperature Range
    • Compatible With High-Side and Low-Side Current Sense Implementations
  • High-Impedance Analog LED Current Adjust Input (IADJ) With over 15:1 Contrast Ratio
  • Over 1000:1 Series FET PWM Dimming Ratio With Integrated Series N-Channel Dim Driver Interface
  • Continuous LED Current Monitor Output for System Fault Detection and Diagnoses
  • Programmable Switching Frequency With External Clock Synchronization Capability
  • Programmable Soft-Start and Slope Compensation
  • Comprehensive Fault Protection Circuitry Including VCC Undervoltage Lockout (UVLO), Output Overvoltage Protection (OVP), Cycle-by-Cycle Switch Current Limit, and Thermal Protection
  • TPS92691-Q1: Automotive Q100 Grade 1 Qualified

The TPS92691/-Q1 is a versatile LED controller that can support a range of step-up or step-down driver topologies. The device implements a fixed-frequency peak current mode control technique with programmable switching frequency, slope compensation, and soft-start timing. It incorporates a high voltage (65-V) rail-to-rail current sense amplifier that can directly measure LED current using either a high-side or a low-side series sense resistor. The amplifier is designed to achieve low input offset voltage and attain better than ±3% LED current accuracy over junction temperature range of 25°C to 140°C and output common-mode voltage range of 0 to 60 V.

LED current can be independently modulated using either analog or PWM dimming techniques. Linear analog dimming response with 15:1 range is obtained by varying the voltage from 140 mV to 2.25 V across the high impedance analog adjust (IADJ) input. PWM dimming of LED current is achieved by modulating the PWM input pin with the desired duty cycle and frequency. Optional DDRV gate driver output can be used to enable series FET dimming functionality to get over 1000:1 contrast ratio.

The TPS92691/-Q1 supports continuous LED status check through the current monitor (IMON) output. This allows for LED short circuit or open circuit detection and protection. Additional fault protection features include VCC UVLO, output OVP, switch cycle-by-cycle current limit, and thermal protection.

The TPS92691/-Q1 is a versatile LED controller that can support a range of step-up or step-down driver topologies. The device implements a fixed-frequency peak current mode control technique with programmable switching frequency, slope compensation, and soft-start timing. It incorporates a high voltage (65-V) rail-to-rail current sense amplifier that can directly measure LED current using either a high-side or a low-side series sense resistor. The amplifier is designed to achieve low input offset voltage and attain better than ±3% LED current accuracy over junction temperature range of 25°C to 140°C and output common-mode voltage range of 0 to 60 V.

LED current can be independently modulated using either analog or PWM dimming techniques. Linear analog dimming response with 15:1 range is obtained by varying the voltage from 140 mV to 2.25 V across the high impedance analog adjust (IADJ) input. PWM dimming of LED current is achieved by modulating the PWM input pin with the desired duty cycle and frequency. Optional DDRV gate driver output can be used to enable series FET dimming functionality to get over 1000:1 contrast ratio.

The TPS92691/-Q1 supports continuous LED status check through the current monitor (IMON) output. This allows for LED short circuit or open circuit detection and protection. Additional fault protection features include VCC UVLO, output OVP, switch cycle-by-cycle current limit, and thermal protection.

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技術文件

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類型 標題 日期
* Data sheet TPS92691/-Q1 Multi-Topology LED Driver With Rail-to-Rail Current Sense Amplifier datasheet PDF | HTML 2015年 12月 11日
White paper LED Drivers for Automotive Exterior Applications (Rev. B) 2018年 3月 27日
Selection guide 汽车外部照明应用的LED驱动器 2018年 3月 15日
Technical article Lighting the road ahead: LEDs in automotive front lighting PDF | HTML 2016年 9月 29日
EVM User's guide TPS92691 Boost and Boost-to-Battery LED Driver Evaluation Board 2016年 3月 11日
EVM User's guide TPS92691 SEPIC LED Driver Evaluation Board 2015年 12月 9日

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

TPS92691EVM-001 — TPS92691 SEPIC LED 驅動器評估板

The TPS92691EVM-001 is a fully assembled and tested SEPIC LED driver designed to power a single string of series connected LEDs. Acurate closed-loop LED current regulation is achieved using a low-offset rail-to-rail curren sense amplifier that is compatible with either a high side or a low side (...)

使用指南: PDF
TI.com 無法提供
開發板

TPS92691EVM-752 — TPS92691-Q1 升壓和升壓至電池 LED 驅動器評估板

TPS92691EVM-752 是完全組裝且經過測試的 LED 驅動器,可配置為升壓或升壓至電池拓撲,為單串列串聯 LED 供電。使用低偏移軌對軌電流感測放大器和高壓側電流感測實作,即可實現精確的閉合迴路 LED 電流穩壓。DC LED 電流設定點可利用高阻抗類比調整 (IADJ) 輸入在 15:1 比率上改變。整合式閘極驅動器電路與專有 PWM 調光邏輯,可實現高於 100:1 調光比的外部串聯 P 通道 MOSFET PWM 調光。

LED 短路故障和其他纜線線束故障偵測可由電流監控器輸出 (IMON) 協助進行,可報告由軌至軌電流感測放大器測量的 LED (...)

使用指南: PDF
TI.com 無法提供
模擬型號

TPS92691-Q1 Boost and SEPIC PSpice Transient Model (Rev. A)

SLVMBE8A.ZIP (153 KB) - PSpice Model
計算工具

SLVC671 TPS92691 Boost Design Calculator

支援產品和硬體

支援產品和硬體

產品
照明 LED 驅動器
TPS92691 具有軌對軌電流感測放大器的 TPS92691 多拓撲 LED 驅動器
汽車 LED 驅動器
TPS92691-Q1 具有軌對軌電流感測放大器的汽車多拓撲 LED 驅動器
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 (...)
參考設計

TIDA-01382 — 具有線性熱保護機制的車用日間行車燈 (DRL) LED 驅動器參考設計

TIDA-01382 參考設計為一精密脈衝寬度調變 (PWM) 調光解決方案,適用於包括熱回折在內的日間行車燈 (DRL),無需微控制器 (MCU)。此設計包括如電磁干擾 (EMI) 濾波、電磁相容性 (EMC) 濾波、電壓調節(分流穩壓器)、熱回折、精密時脈產生和 LED 驅動等主要週邊設備。
Design guide: PDF
電路圖: PDF
參考設計

PMP15003 — 適用於售後市場燈條、聚光燈和泛光燈的可調光 LED 驅動器參考設計

這款車用升壓 LED 驅動器旨在以 34V 的最大电压和 34W 最大輸出功率驅動 LED 燈串。按照設計,此解決方案可滿足 CISPR 25 3 類 EMC 的要求,並具備 10:1 類比調光功能。高壓側電流感測可將 LED 燈串的一端連接至系統的接地端,以輕鬆連接。
Test report: PDF
電路圖: PDF
參考設計

PMP15027 — 適用於汽車照明和 ADAS 系統的高電流 SEPIC 參考設計

此參考設計最適合用於汽車 ADAS 系統中,IR LED 高達 3A 的高電流脈衝運作。即使在負載突降和熱啟動事件中,也能連續運作與脈衝運作。其他功能包括類比調光及 CISPR-25 第 3 級 EMI 濾波功能。
Test report: PDF
電路圖: PDF
參考設計

TIDA-01381 — 適用於 LED 頭燈的車用多通道溫度感測參考設計

此參考設計詳述如何驅動一串矩陣 LED 前照燈,測量 LED 溫度,並實作熱回折支援,此回折可在 LED 溫度上升時減少 LED 中的電流,以避免損壞 LED。此設計採用溫度感測而非負溫度係數 (NTC) 熱敏電阻,以減少元件數量,實體線數量,並減少微控制器上使用的針腳數量。TIDA-01381 應與微控制器介接,進而降低 LED 的熱回折電流。該設計的輸入級包括電磁干擾 (EMI) 及電磁相容性 (EMC) 濾波器,可直接由汽車電池供電。
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01183 — 適用於車用照明的精密 PWM 調光 LED 驅動器參考設計

此參考設計展示如何使用脈衝寬度調變 (PWM) 對汽車頭燈或尾燈進行調光,精度優於 2% 占空比,且無需使用微控制器。如此可讓設計更具成本競爭力。此設計中使用的裝置為 TPS92691-Q1 多拓撲結構 LED 驅動器,用於控制 LED 的升壓和升壓至電池配置。  TLC555-Q1 LinCMOS 定時器與 OPA2377-Q1 運算放大器一起,透過套用回饋迴路和精密分流穩壓器來測量並產生準確的 PWM 訊號,從而準確設定占空比。此設計的輸入級經過 EMI/EMC 濾波,並可由汽車電池直接供電。
Design guide: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 16 Ultra Librarian

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