The LP8867-Q1, LP8869-Q1 is an automotive highly-integrated, low-EMI, easy-to-use LED driver with DC-DC converter. The DC-DC converter supports both boost and SEPIC mode operation. The device has four or three high-precision current sinks that can be combined for higher current capability.

The DC-DC converter has adaptive output voltage control based on the LED forward voltages. This feature minimizes the power consumption by adjusting the voltage to the lowest sufficient level in all conditions. For EMI reduction DC-DC supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the LP886x-Q1 to avoid disturbance for sensitive frequency band.

The input voltage range for the LP886x-Q1 is from 4.5 V to 40 V to support automotive start-stop and load dump condition. The LP886x-Q1 integrates extensive fault detection features.

• AEC-Q100 Qualified for automotive applications:
  • Device temperature grade 1: –40°C to +125°C, TA
• Functional safety capable
  • Documentation available to aid functional safety system design
• 3-, 4-Channel 120-mA current sinks
  • High dimming ratio of 10 000:1 at 100 Hz
  • Current matching 1% (typical)
  • LED String current up to 120 mA per channel
  • Outputs can be combined externally for higher current per string
• Integrated boost and SEPIC converter for LED string power
  • Input voltage operating range 4.5 V to 40 V
  • Output voltage up to 45 V
  • Integrated 3.3-A Switch FET
  • Switching frequency 300 kHz to 2.2 MHz
  • Switching synchronization input
  • Spread spectrum for lower EMI
• Fault detection and protection
  • Fault output
  • Input voltage OVP, UVLO and OCP
  • Boost block SW OVP and output OVP
  • LED open and short fault detection
  • Power-Line FET control for battery bus protection
  • Automatic LED current reduction with external temperature sensor
  • Thermal shutdown

• Number of channels (#)
• 3
• Topology
• Boost with Current Sink, Sepic
• Rating
• Automotive
• TI functional safety category
• Functional Safety-Capable
• 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)
• 0.36
• Iq (Typ) (mA)
• 4.5
• Switching frequency (Max) (kHz)
• 2200
• Features
• Adjustable Switch Frequency, Boost Sync, Current Derating, Enable/Shutdown, Fault Detection, Global dimming, Integrated Switch, LED Open Detection, LED Shorted Detection, Load Disconnect During Shutdown, Power-Line FET, Soft Start, Spread Spectrum, Synchronization Pin, Thermal Shutdown

LP8869-Q1的完整型号有：LP8869QPWPRQ1，以下是这些产品的关键参数及官网采购报价：

LP8869QPWPRQ1，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网LP8869QPWPRQ1的批量USD价格：.75（1000+）

LP8867Q1EVM — 用于汽车照明的 LP8867-Q1 4 通道 LED 驱动器评估模块

LP8867Q1EVM 帮助设计人员评估 LP8867/9-Q1 器件（用于汽车照明的高性能 LED 驱动器）的特性、操作和使用情况。LP8867/9-Q1 器件是一款易于使用的 LED 驱动器，具有集成式直流/直流转换器。该器件还具有四个/三个可由 PWM 输入信号控制的 120mA 高精度灌电流，并集成了丰富的故障检测功能。

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