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TPS92643-Q1

現行

車用 3-A 同步降壓 LED 驅動器

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產品規格表

TPS92643-Q1

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 1 Topology Buck Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 5 Vin (max) (V) 42 Vout (min) (V) 4.5 Vout (max) (V) 33 Iout (max) (A) 3 Iq (typ) (mA) 56 Switching frequency (max) (kHz) 2200 Features Fault Detection, LED Open Detection, Precision Dimming Control, Thermal shutdown
Number of channels 1 Topology Buck Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 5 Vin (max) (V) 42 Vout (min) (V) 4.5 Vout (max) (V) 33 Iout (max) (A) 3 Iq (typ) (mA) 56 Switching frequency (max) (kHz) 2200 Features Fault Detection, LED Open Detection, Precision Dimming Control, Thermal shutdown
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • AEC-Q100 qualified for automotive applications
    • Grade 1: –40°C to 125°C ambient operating temperature
    • Device HBM classification level H1C
    • Device CDM classification level C5
  • Input voltage range: 5.5 V to 36 V
    • Operation down to 5.15 V after start-up
  • Up to 3-A continuous with 4% accuracy
  • Adaptive on-time current control
    • Low offset high-side current sense amplifier
    • Stable with any combination of ceramic, and aluminum capacitors
  • Programmable switching frequency from 100 kHz to 2.2 MHz
  • Advanced dimming operation
    • 1000:1 precision PWM dimming
    • 15:1 precision analog dimming
    • 1.4-kHz internal analog input to PWM duty cycle translation
  • Cycle-by-cycle switch overcurrent protection
  • Open-drain fault indicator output
    • LED short circuit, open circuit and cable harness fault indication
  • Thermal shutdown protection
  • AEC-Q100 qualified for automotive applications
    • Grade 1: –40°C to 125°C ambient operating temperature
    • Device HBM classification level H1C
    • Device CDM classification level C5
  • Input voltage range: 5.5 V to 36 V
    • Operation down to 5.15 V after start-up
  • Up to 3-A continuous with 4% accuracy
  • Adaptive on-time current control
    • Low offset high-side current sense amplifier
    • Stable with any combination of ceramic, and aluminum capacitors
  • Programmable switching frequency from 100 kHz to 2.2 MHz
  • Advanced dimming operation
    • 1000:1 precision PWM dimming
    • 15:1 precision analog dimming
    • 1.4-kHz internal analog input to PWM duty cycle translation
  • Cycle-by-cycle switch overcurrent protection
  • Open-drain fault indicator output
    • LED short circuit, open circuit and cable harness fault indication
  • Thermal shutdown protection

The TPS92643-Q1 is a monolithic, synchronous Buck LED driver with a wide 5.5-V to 36-V operating input voltage range and 40-V tolerance that supports load dump for duration of 400 ms. The TPS92643-Q1 implements an adaptive on-time average current mode control based on inductor valley current detection. The adaptive on-time control provides near constant switching frequency that can be set between 100 kHz and 2.2 MHz. Inductor current sensing and closed-loop feedback enables better than ±4% accuracy over wide input, output and ambient temperature.

The high-performance LED driver can independently modulate LED current using both analog or PWM dimming techniques. Linear analog dimming range with over 15:1 range is obtained by setting the IADJ voltage. PWM dimming of LED current is achieved by directly modulating the UDIM input pin with desired duty cycle or setting the analog voltage at APWM to enable internal analog-to-PWM conversion. The internal PWM generator translates the external analog voltage by comparing it to an internal 1.4-kHz ramp signal.

The TPS92643-Q1 incorporates advanced diagnostic and fault protection featuring: cycle-by-cycle switch current limit, bootstrap undervoltage, LED open, LED short and thermal shutdown.

The TPS92643-Q1 is available in a 6.6-mm × 5.1-mm thermally-enhanced 16-pin HTSSOP package with 0.65-mm lead pitch.

The TPS92643-Q1 is a monolithic, synchronous Buck LED driver with a wide 5.5-V to 36-V operating input voltage range and 40-V tolerance that supports load dump for duration of 400 ms. The TPS92643-Q1 implements an adaptive on-time average current mode control based on inductor valley current detection. The adaptive on-time control provides near constant switching frequency that can be set between 100 kHz and 2.2 MHz. Inductor current sensing and closed-loop feedback enables better than ±4% accuracy over wide input, output and ambient temperature.

The high-performance LED driver can independently modulate LED current using both analog or PWM dimming techniques. Linear analog dimming range with over 15:1 range is obtained by setting the IADJ voltage. PWM dimming of LED current is achieved by directly modulating the UDIM input pin with desired duty cycle or setting the analog voltage at APWM to enable internal analog-to-PWM conversion. The internal PWM generator translates the external analog voltage by comparing it to an internal 1.4-kHz ramp signal.

The TPS92643-Q1 incorporates advanced diagnostic and fault protection featuring: cycle-by-cycle switch current limit, bootstrap undervoltage, LED open, LED short and thermal shutdown.

The TPS92643-Q1 is available in a 6.6-mm × 5.1-mm thermally-enhanced 16-pin HTSSOP package with 0.65-mm lead pitch.
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* Data sheet TPS92643-Q1 Automotive 3-A Synchronous Buck LED Driver datasheet PDF | HTML 2022年 5月 12日
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 2024年 4月 30日

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開發板

TPS92643EVM-204 — 適用於汽車 3-A 同步降壓 LED 驅動器的 TPS92643-Q1 評估模組

TPS92643EVM-204 評估模組 (EVM) 可協助設計人員評估針對高電流 LED 驅動應用設計的 TPS92643-Q1 3.0-A 降壓切換穩壓器的操作與性能。TPS92643-Q1 設計旨在控制高亮度發光二極體 (LED)，具備廣泛的輸入電壓範圍 (5.5 V 至 40 V)、PWM 調光功能、類比調光功能、輸入欠電壓防護、故障偵測、內部 5-V 穩壓器，以及對板載 1.4-kHz PMW 訊號執行工作週期控制的能力。

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