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LP8864-Q1

現行

具有四個 200mA 通道的車用顯示器 LED 背光驅動器

產品詳細資料

Number of channels 4 Topology Boost with Current Sink, SEPIC Controller Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 3 Vin (max) (V) 48 Vout (min) (V) 0 Vout (max) (V) 48 Iout (max) (A) 0.8 Iq (typ) (mA) 20 Switching frequency (max) (kHz) 2200 Features Adjustable Switch Frequency, Boost Sync, Current Derating, Enable/Shutdown, Fault Detection, Fault Diagnostic, Global dimming, Hybrid Dimming/Phase Shift, I2C control, LED Open Detection, LED Short to Ground Detection, LED Shorted Detection, Load Disconnect During Shutdown, Power-Line FET, Soft Start, Spread Spectrum, Synchronization Pin, Thermal shutdown
Number of channels 4 Topology Boost with Current Sink, SEPIC Controller Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 3 Vin (max) (V) 48 Vout (min) (V) 0 Vout (max) (V) 48 Iout (max) (A) 0.8 Iq (typ) (mA) 20 Switching frequency (max) (kHz) 2200 Features Adjustable Switch Frequency, Boost Sync, Current Derating, Enable/Shutdown, Fault Detection, Fault Diagnostic, Global dimming, Hybrid Dimming/Phase Shift, I2C control, LED Open Detection, LED Short to Ground Detection, LED Shorted Detection, Load Disconnect During Shutdown, Power-Line FET, Soft Start, Spread Spectrum, Synchronization Pin, Thermal shutdown
HTSSOP (DCP) 38 62.08 mm² 9.7 x 6.4 VQFN (RHB) 32 25 mm² 5 x 5
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C, TA
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Input voltage operating range 3V to 48V
  • Four high-precision current sinks
    • Up to 200mA DC current for each current sink
    • Current matching 1% (typical)
    • Dimming ratio 32 000:1 using 152Hz LED output PWM frequency
    • Up to 16-bit LED dimming resolution with I2C, or PWM input
    • 8 Configurable LED strings configuration
  • Auto-phase shift PWM dimming
  • 12-bit analog dimming
  • Up to 48V VOUT boost or SEPIC DC/DC controller
    • Switching frequency 100kHz to 2.2MHz
    • Boost spread spectrum for reduced EMI
    • Boost sync input to set boost switching frequency from an external clock
    • Output voltage automatically discharged when boost is disabled
  • Extensive fault diagnostics
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C, TA
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Input voltage operating range 3V to 48V
  • Four high-precision current sinks
    • Up to 200mA DC current for each current sink
    • Current matching 1% (typical)
    • Dimming ratio 32 000:1 using 152Hz LED output PWM frequency
    • Up to 16-bit LED dimming resolution with I2C, or PWM input
    • 8 Configurable LED strings configuration
  • Auto-phase shift PWM dimming
  • 12-bit analog dimming
  • Up to 48V VOUT boost or SEPIC DC/DC controller
    • Switching frequency 100kHz to 2.2MHz
    • Boost spread spectrum for reduced EMI
    • Boost sync input to set boost switching frequency from an external clock
    • Output voltage automatically discharged when boost is disabled
  • Extensive fault diagnostics

The LP8864-Q1 is an automotive high-efficiency LED driver with boost controller. The Four high-precision current sinks support phase shifting that is automatically adjusted based on the number of channels in use. LED brightness can be controlled globally through the I²C interface or PWM input.

The boost controller has adaptive output voltage control based on the headroom voltages of the LED current sinks. This feature minimizes the power consumption by adjusting the boost voltage to the lowest sufficient level in all conditions. A wide-range adjustable frequency allows the LP8864-Q1 to avoid disturbance for AM radio band.

The LP8864-Q1 supports built-in hybrid PWM dimming and analog current dimming, which reduces EMI, extends the LED lifetime, and increases the total optical efficiency.

The LP8864-Q1 is an automotive high-efficiency LED driver with boost controller. The Four high-precision current sinks support phase shifting that is automatically adjusted based on the number of channels in use. LED brightness can be controlled globally through the I²C interface or PWM input.

The boost controller has adaptive output voltage control based on the headroom voltages of the LED current sinks. This feature minimizes the power consumption by adjusting the boost voltage to the lowest sufficient level in all conditions. A wide-range adjustable frequency allows the LP8864-Q1 to avoid disturbance for AM radio band.

The LP8864-Q1 supports built-in hybrid PWM dimming and analog current dimming, which reduces EMI, extends the LED lifetime, and increases the total optical efficiency.

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LP8866-Q1 現行 具有六個 200-mA 通道的汽車顯示 LED 背光驅動器 LP8866-Q1, LP8866S-Q1, LP8864-Q1, LP8864S-Q1 are hardware and software compatible

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類型 標題 日期
* Data sheet LP8864-Q1 Automotive Display LED-backlight Driver with Four 200 mA Channels datasheet (Rev. B) PDF | HTML 2024年 5月 7日
Application note LP886x-Q1 Feedback Resistor Design Considerations PDF | HTML 2021年 5月 12日
User guide LP8864 Evaluation Module PDF | HTML 2020年 11月 4日
Application note LP8864-Q1, LP8864S-Q1, LP8866-Q1, and LP8866S-Q1 Diagnostic Description and Faul PDF | HTML 2020年 7月 16日
Certificate LP8864EVM EU Declaration of Conformity (DoC) 2020年 6月 4日

設計與開發

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開發板

LP8864EVM — LP8864-Q1 4 通道車用顯示器 LED 驅動器評估模組

LP8864EVM 可協助設計人員評估 LP8864(S)-Q1 產品 (適合車用顯示器 LED 背光的 4 通道高效率 LED 驅動器) 的特性、運作及性能。LP8864(S)-Q1 產品整合升壓或 SEPIC 控制器及四個高精度電流汲極。升壓控制器具備自適性輸出電壓控制,以 LED 電流汲極的空餘空間電壓為基礎。四個電流汲極支援根據使用通道數進行自動調整的相位轉換。LED 亮度可透過 I2C 介面或 PWM 輸入控制。此產品也支援各種故障偵測功能。
使用指南: PDF | HTML
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HTSSOP (DCP) 38 Ultra Librarian
VQFN (RHB) 32 Ultra Librarian

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