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汽車 LED 驅動器

LP8862-Q1

現行

車用照明高效能 2 通道 LED 驅動器

立即訂購
產品規格表

LP8862-Q1

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 2 Topology Boost with Current Sink, SEPIC Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 4.5 Vin (max) (V) 40 Vout (min) (V) 6 Vout (max) (V) 45 Iout (max) (A) 0.32 Iq (typ) (mA) 5 Switching frequency (max) (kHz) 2200 Features Adjustable Switch Frequency, Boost Sync, Fault Detection, Global dimming, Power-Line FET, SEPIC Sync, Spread Spectrum
Number of channels 2 Topology Boost with Current Sink, SEPIC Rating Automotive Operating temperature range (°C) -40 to 125 Vin (min) (V) 4.5 Vin (max) (V) 40 Vout (min) (V) 6 Vout (max) (V) 45 Iout (max) (A) 0.32 Iq (typ) (mA) 5 Switching frequency (max) (kHz) 2200 Features Adjustable Switch Frequency, Boost Sync, Fault Detection, Global dimming, Power-Line FET, SEPIC Sync, Spread Spectrum
HTSSOP (PWP) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
  • Input Voltage Operating Range 4.5 V to 40 V
  • Two High-Precision Current Sinks
    • Current Matching 1% (Typical)
    • LED String Current up to 160 mA per Channel
    • Dimming Ratio of 10 000:1 at 100 Hz
  • Integrated Boost/SEPIC Converter for LED String Power
    • Output Voltage up to 45 V
    • Switching Frequency 300 kHz to 2.2 MHz
    • Switching Synchronization Input
    • Spread Spectrum for Lower EMI
  • Power-Line FET Control for Inrush Current Protection and Standby Energy Saving
  • Extensive Fault Detection Features
    • Fault Output
    • Input Voltage OVP, UVLO, and OCP
    • Open and Shorted LED Fault Detection
    • Thermal Shutdown
  • Minimum Number of External Components
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
  • Input Voltage Operating Range 4.5 V to 40 V
  • Two High-Precision Current Sinks
    • Current Matching 1% (Typical)
    • LED String Current up to 160 mA per Channel
    • Dimming Ratio of 10 000:1 at 100 Hz
  • Integrated Boost/SEPIC Converter for LED String Power
    • Output Voltage up to 45 V
    • Switching Frequency 300 kHz to 2.2 MHz
    • Switching Synchronization Input
    • Spread Spectrum for Lower EMI
  • Power-Line FET Control for Inrush Current Protection and Standby Energy Saving
  • Extensive Fault Detection Features
    • Fault Output
    • Input Voltage OVP, UVLO, and OCP
    • Open and Shorted LED Fault Detection
    • Thermal Shutdown
  • Minimum Number of External Components

The LP8862-Q1 is an automotive high-efficiency, low-EMI, easy-to-use LED driver with integrated DC-DC converter. The DC-DC supports both boost and SEPIC modes of operation. The device has two high-precision current sinks that can provide high dimming ratio brightness control with a PWM input signal.

The boost/SEPIC converter has an adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes power consumption by adjusting the voltage to the lowest sufficient level in all conditions. DC-DC supports spread spectrum for switching frequency and an external synchronization with a dedicated pin. A wide-range adjustable frequency allows the LP8862-Q1 to avoid disturbance for AM radio band.

The input voltage range for the LP8862-Q1 is from 4.5 V to 40 V to support automotive stop/start and load dump conditions. The device supports PWM brightness dimming ratio of 10 000:1 for 100-Hz input PWM frequency. The LP8862-Q1 integrates extensive fault detection features. The device has an option to drive an external p-FET to disconnect the input supply from the system in the event of a fault. This feature also reduces inrush current and standby power consumption.

The LP8862-Q1 is an automotive high-efficiency, low-EMI, easy-to-use LED driver with integrated DC-DC converter. The DC-DC supports both boost and SEPIC modes of operation. The device has two high-precision current sinks that can provide high dimming ratio brightness control with a PWM input signal.

The boost/SEPIC converter has an adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes power consumption by adjusting the voltage to the lowest sufficient level in all conditions. DC-DC supports spread spectrum for switching frequency and an external synchronization with a dedicated pin. A wide-range adjustable frequency allows the LP8862-Q1 to avoid disturbance for AM radio band.

The input voltage range for the LP8862-Q1 is from 4.5 V to 40 V to support automotive stop/start and load dump conditions. The device supports PWM brightness dimming ratio of 10 000:1 for 100-Hz input PWM frequency. The LP8862-Q1 integrates extensive fault detection features. The device has an option to drive an external p-FET to disconnect the input supply from the system in the event of a fault. This feature also reduces inrush current and standby power consumption.
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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 LP8862-Q1 Low-EMI Automotive LED Driver With Two 160-mA Channels datasheet (Rev. D) PDF | HTML 2017/6/8
應用說明 Some Guidelines and Tips for the LED Driver Application 2019/8/14
白皮書 Powering automotive displays to create interactive driving experiences 2017/12/21
應用說明 PCB Layout Guideline for Automotive LED Drivers 2017/4/7

設計與開發

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開發板

LP8862Q1EVM — 適用於車用照明的 LP8862-Q1 雙通道 LED 驅動器評估模組

LP8862Q1EVM 評估模組 (EVM) 可協助設計人員評估此裝置的運作和性能。  LP8862Q1EVM 採用 LP8862-Q1 驅動晶片，可高效驅動最多 2 組 LED 燈串（每組最多 12 顆 LED，共計 24 顆 LED），適用於 LCD 背光應用。  LP8862Q1EVM 的輸出電壓與電流額定值相關資訊，亦可參閱 LP8862-Q1 產品規格表。  電池的電源供應連接與各訊號測試點，均配置於該評估板上。  LED 亮度可透過外部 PWM 訊號控制。  可單獨使用 LED 板作為負載，或將 LCD 板連接至輸出連接器。

使用指南: PDF
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LP8862-Q1 Unencrypted PSpice Transient Model Package (Rev. B)

SNVMAV0B.ZIP (174 KB) - PSpice 模型
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