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 4.5 V to 40 V

• Two High-Precision Current Sinks

– Current Matching 1% (Typical)

– LED String Current up to 160 mA per 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 Features

– Fault Output

– Input Voltage OVP, UVLO, and OCP

– Open and Shorted LED Fault Detection

– Thermal Shutdown

• Minimum Number of External Components

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 LP8862-Q1 is an automotive high-efficiency, low-

EMI, easy-to-use LED driver with integrated DC-DC

converter. The DC-DC supports both boost and

SEPIC modes of operation. The device has two highprecision

current sinks that can provide high dimming

ratio brightness control with a PWM input signal.

The boost/SEPIC converter has an adaptive output

voltage control based on the LED current sink

headroom voltages. This feature minimizes power

consumption by adjusting the voltage to the lowest

sufficient level in all conditions. DC-DC supports

spread spectrum for switching frequency and an

external synchronization with a dedicated pin. A widerange

adjustable frequency allows the LP8862-Q1 to

avoid disturbance for AM radio band.

The input voltage range for the LP8862-Q1 is from

4.5 V to 40 V to support automotive stop/start and

load dump conditions. The device supports PWM

brightness dimming ratio of 10 000:1 for 100-Hz input

PWM frequency. The LP8862-Q1 integrates

extensive fault detection features. The device has an

option to drive an external p-FET to disconnect the

input supply from the system in the event of a fault.

This feature also reduces inrush current and standby

power consumption.