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LP8862-Q1

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适用于汽车照明的高性能 2 通道 LED 驱动器

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数据表

LP8862-Q1

正在供货
数据表 立即订购

产品详情

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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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LP8862-Q1 Low-EMI Automotive LED Driver With Two 160-mA Channels 数据表 (Rev. D) PDF | HTML 2017-6-8
应用手册 Some Guidelines and Tips for the LED Driver Application 2019-8-14
白皮书 Powering automotive displays to create interactive driving experiences 2017-12-21
应用手册 PCB Layout Guideline for Automotive LED Drivers 2017-4-7

设计与开发

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评估板

LP8862Q1EVM — LP8862-Q1 用于汽车照明的 2 通道 LED 驱动器评估模块

LP8862Q1EVM 评估模块 (EVM) 可帮助设计人员评估此器件的运行情况和性能。  LP8862Q1EVM 使用 LP8862-Q1 驱动最多 2 个 LED 灯串（每个灯串最多 12 个 LED、总共 24 个 LED），实现高效率 LCD 背光。  有关 LP8862Q1EVM 额定输出电压和电流的信息，还可参阅 LP8862-Q1 数据表。  电池的电源连接点和每个信号的测试点均位于评估板上。  LED 亮度可通过外部 PWM 信号控制。  单独的 LED 板可用作负载，也可以将 LCD 面板连接至输出连接器。

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仿真模型

LP8862-Q1 Unencrypted PSpice Transient Model Package (Rev. B)

SNVMAV0B.ZIP (174 KB) - PSpice 模型
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封装 引脚 CAD 符号、封装和 3D 模型
HTSSOP (PWP) 20 Ultra Librarian
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