Product details

Number of channels (#) 4 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) 10 Vout (Max) (V) 40 Iout (Max) (A) 0.4 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, Temperature Compensation
Number of channels (#) 4 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) 10 Vout (Max) (V) 40 Iout (Max) (A) 0.4 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, Temperature Compensation
HTSSOP (PWP) 20 42 mm² 6.5 x 6.4
  • Qualified for Automotive Applications
  • AECQ100 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
  • Four High-Precision Current Sinks
    • Current Matching 1% (Typical)
    • LED String Current up to 100 mA/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 and Tolerance Features
    • Fault Output
    • Input Voltage OVP, UVLO, and OCP
    • Open and Shorted LED Fault Detection
    • Automatic LED Current Reduction With External Temperature Sensor
    • Thermal Shutdown
  • Minimum Number of External Components
  • Qualified for Automotive Applications
  • AECQ100 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
  • Four High-Precision Current Sinks
    • Current Matching 1% (Typical)
    • LED String Current up to 100 mA/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 and Tolerance Features
    • Fault Output
    • Input Voltage OVP, UVLO, and OCP
    • Open and Shorted LED Fault Detection
    • Automatic LED Current Reduction With External Temperature Sensor
    • Thermal Shutdown
  • Minimum Number of External Components

The LP8861-Q1 is an automotive high-efficiency, low-EMI, easy-to-use LED driver with integrated boost/SEPIC converter. It has four high-precision current sinks that can provide high dimming ratio brightness control with a PWM input signal.

The boost/SEPIC converter has adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions. The boost/SEPIC converter supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the LP8861-Q1 to avoid disturbance for AM radio band.

The LP8861-Q1 has an option to drive an external p-FET to disconnect the input supply from the system in the event of a fault and reduce inrush current and standby power consumption. The device can reduce LED current based on temperature measured with external NTC sensor to protect LED from overheating and extend LED lifetime.

The input voltage range for the LP8861-Q1 is from 4.5 V to 40 V to support automotive stop/start and load dump condition. The LP8861-Q1 integrates extensive fault detection and protection features.

The LP8861-Q1 is an automotive high-efficiency, low-EMI, easy-to-use LED driver with integrated boost/SEPIC converter. It has four high-precision current sinks that can provide high dimming ratio brightness control with a PWM input signal.

The boost/SEPIC converter has adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions. The boost/SEPIC converter supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the LP8861-Q1 to avoid disturbance for AM radio band.

The LP8861-Q1 has an option to drive an external p-FET to disconnect the input supply from the system in the event of a fault and reduce inrush current and standby power consumption. The device can reduce LED current based on temperature measured with external NTC sensor to protect LED from overheating and extend LED lifetime.

The input voltage range for the LP8861-Q1 is from 4.5 V to 40 V to support automotive stop/start and load dump condition. The LP8861-Q1 integrates extensive fault detection and protection features.

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Technical documentation

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Type Title Date
* Data sheet LP8861-Q1 Low-EMI Automotive LED Driver With Four 100-mA Channels datasheet (Rev. C) 08 Jun 2017
Application note Some Guidelines and Tips for the LED Driver Application 14 Aug 2019
White paper Powering automotive displays to create interactive driving experiences 21 Dec 2017
Application note PCB Layout Guideline for Automotive LED Drivers 07 Apr 2017
Technical article Here's how body electronics and lighting technology are changing the driving experience 26 Sep 2016
Technical article LED brightness adjustment: high-frequency PWM dimming 26 Aug 2016
EVM User's guide Using the LP8861-Q1EVM 08 Jul 2015
Technical article Take better selfies with innovative LED flashes 18 Nov 2014
Technical article Solving the automotive EMI issues in new cars with all the screens 11 Sep 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LP8861Q1EVM — LP8861-Q1 4-Channel LED Driver for Automotive Lighting Evaluation Module

The LP8861Q1EVM evaluation module (EVM) helps designers evaluate the operation and performance of this device.  The LP8861Q1EVM uses the LP8861-Q1 to drive up to 4 LED strings (up to 12 LEDs each, 48 LEDs together) for LCD backlighting with high efficiency.  Information about output (...)

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

TIDA-00503 — Automotive SEPIC Backlight Driver Reference Design

The TIDA-00503 refrence design is a SEPIC mode LED driver design for automotive backlight applications with 2 or 3 LEDs in series. SEPIC enables VIN both above and below VOUT. The LED driver operates at a switching frequency of 2.2MHz for a small overall footprint and all components are limited to (...)
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HTSSOP (PWP) 20 View options

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