HLQFP-32 LP8860 IC Integrated Circuit LP8860AQVFPRQ1 LED Driver Chip

LP8860AQVFPRQ1 LED Driver Chip HLQFP-32 LP8860 IC Integrated Circuit

1 Features

1• 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 3 V to 48 V
• Four High-Precision Current Sinks
– Current Matching 0.5% (typical)
– LED String Current up to 150 mA per Channel
– Dimming Ratio > 13 000:1 With External PWM
Brightness Control
– 16-bit Dimming Control with SPI or I
2C
– Supports Display Mode (Global Dimming) and
Cluster Mode (Independent Dimming)
• 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 for Lower EMI
• Boost Synchronization Input
• Power-Line FET Control for Inrush Current
Protection and Standby Energy Saving
• Automatic LED Current Reduction With External
Temperature Sensor
• Extensive Fault Diagnostics

2 Applications

• Backlight for:
– Automotive Infotainment
– Automotive Instrument Clusters
– Smart Mirrors
– Heads-Up Displays (HUD)
– Central Information Displays (CID)
– Audio-Video Navigation (AVN)

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 I
2C master, or both.
The boost converter has adaptive output voltage
control based on the headroom voltages of the LED
current sinks. This feature minimizes the power
consumption by adjusting the voltage to the lowest
sufficient level in all conditions. A wide-range
adjustable 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 reduces audible noise
and output ripple.