LP8860AQVFPRQ1

1 Features

• Qualified for Automotive Applications

• AEC-Q100 Qualified With the Following Results:

– Device Temperature Grade 1: –40°C to 125°C 

• Four High Precision Current Sinks

– Current Matching 0.5% (typical)

– Output Current up to 150 mA per Channel

– Individual LED String Current Adjustment

–7.4 to 6.5%

– Dimming Ratio >13 000:1 with External PWM Brightness Control

– 16-bit Dimming Control with SPI™ or I2C – Two Modes: Display Mode and Cluster Mode with Individual Control

• Hybrid PWM and Current Dimming for Higher LED Drive Optical Efficiency

• Synchronization for LED PWM Frequency

• Boost Controller With Programmable Switching Frequency 100 kHz to 2.2 MHz and SpreadSpectrum Option

• Boost Synchronization Input

• Input Voltage Operating Range 3 V to 48 V 

• Power Line FET Control for Inrush Current Protection and Standby Energy Saving

• Automatic LED Current Reduction with External Temperature Sensor

• Extensive Safety and Fault Tolerance Features

• SPI or I2C Interface

2 Applications

Automotive Infotainment and Lighting Systems

3 Description

The LP8860-Q1 is an automotive high-efficiency LED driver with boost controller. It has 4 high-precision current sinks that can be controlled by a PWM input

signal, an SPI or I2C master, or both. 

The boost converter has adaptive output voltage control based on the LED current sinks headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions. Boost controller supports spread spectrum for switching frequency and an external synchronization with dedicated pin. The high switching frequency allows the LP8860-Q1 to avoid disturbance for AM radio band.

The LP8860-Q1 supports built-in Hybrid PWM and Current Dimming which reduces EMI, extends the LED lifetime, and increases the total optical efficiency. Phase Shift PWM allows reduced audible noise and smaller boost output capacitors. The device can drive an external power line FET.

The input voltage range for LP8860-Q1 is 3 V to 48 V to support automotive stop and start conditions. The device integrates extensive and protection features.

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