LP8860-Q1 Datasheet, PDF (1/112 Pages) Texas Instruments – Low-EMI, High-Performance 4-Channel LED Driver for Automotive Lighting

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LP8860-Q1
SNVSA21C – MAY 2014 – REVISED DECEMBER 2015
LP8860-Q1 Low-EMI, High-Performance 4-Channel LED Driver for Automotive Lighting
1 Features
•1 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 Spread-
Spectrum 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (MAX)
LP8860-Q1
HLQFP (32)
7.20 mm x 7.20 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.