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Product details

Parameters

Topology Boost with Current Sink, Sepic 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) 0.6 Iq (Typ) (mA) 20 Switching frequency (Max) (kHz) 2200 Features Adjustable Switch Frequency, Boost Sync, 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, PWM Dimming, Power-Line FET, Sepic Sync, Soft Start, Spread Spectrum, Thermal Shutdown open-in-new Find other Automotive LED drivers

Package | Pins | Size

HTSSOP (DCP) 38 43 mm² 9.7 x 4.4 VQFN (RHB) 32 25 mm² 5 x 5 open-in-new Find other Automotive LED drivers

Features

  • 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 3 V to 48 V
  • Four high-precision current sinks
    • Up to 150-mA DC current for each current sink
    • Current matching 1% (typical)
    • Dimming ratio 32 000:1 using 152-Hz 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 48-V VOUT boost or SEPIC DC/DC controller
    • Switching frequency 100 kHz to 2.2 MHz
    • 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
open-in-new Find other Automotive LED drivers

Description

The LP8864S-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 LP8864S-Q1 to avoid disturbance for AM radio band.

The LP8864S-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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Technical documentation

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Type Title Date
* Data sheet LP8864S-Q1 Automotive Display LED-backlight Driver with Four 150-mA Channels datasheet (Rev. A) Feb. 15, 2021
Application note LP886x-Q1 Feedback Resistor Design Considerations May 12, 2021
Application note LP8864-Q1, LP8864S-Q1, LP8866-Q1, and LP8866S-Q1 Diagnostic Description and Faul Jul. 16, 2020
Technical article Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical article LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical article Take better selfies with innovative LED flashes Nov. 18, 2014
Technical article Solving the automotive EMI issues in new cars with all the screens Sep. 11, 2014

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
299
Description
The LP8864EVM helps designers to evaluate the characteristics, operation, and performance of the LP8864(S)-Q1 product a 4-channel high-efficiency LED driver for automotive display LED backlighting. The LP8864(S)-Q1 product integrates a boost or SEPIC controller and four high-precision current sinks (...)
Features
  • Input voltage range 3 V to 48 V
  • Up to 48-V VOUT boost controller
  • Four high-precision current sinks
  • Supports built-in phase-shift PWM dimming, hybrid dimming, current dimming and direct PWM dimming mode
  • LED brightness controlled globally through I2C interface or PWM input
  • Extensive fault diagnostics

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
HTSSOP (DCP) 38 View options
VQFN (RHB) 32 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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