Texas Instruments LP8873-Q1 Handleiding

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LP8873-Q1 Automotive Display LED-Backlight Driver

with Four 150mA Channels

1 Features

•AEC-Q100 qualified for automotive applications:

–Device temperature grade 1:

–40°C to +125°C, T

A

•Input voltage operating range 3V to 48V

•Four high-precision current sinks

–Up to 150mA DC current for each channel

–Current matching 1% (typical)

–High dimming ratio 32 000:1 using 152Hz LED

output PWM frequency

–Up to 16-bit LED PWM dimming resolution with

I2C, or PWM input

–Support independent PWM dimming control for

each channel

•Auto-phase shift PWM dimming and direct PWM

dimming

•Hybrid dimming and 12-bit analog dimming

•Up to 48V V

OUT

boost or SEPIC DC/DC converter

–Integrated 5.4A switching FET

–Support boost/sepic operation

–Higher efficiency with 60mΩ R

DSON

and fast

switching

–Boost selectable dual random spread spectrum

for reduced EMI

–Adjustable soft start of converter

–Boost sync input to set boost switching

frequency from an external clock

–Output voltage automatically discharged when

boost is disabled

•Extensive fault detection and protection

–Up to 1MHz I

2

C control interface with CRC

check

–Bit-integrity (CRC) error detection on internal

configuration registers and non-volatile memory

(NVM)

–Input voltage OVP, UVLO and OCP

–Boost overcurrent and overvoltage protection

–LED open, short and short to ground fault

detection

–Thermal warning and thermal shutdown

•Small solution size and low cost

–Dynamically programmable wide switching

frequency from 100kHz to 2.2MHz

–Available in 4mm × 4mm HotRod

™

QFN

package with wettable flank

2 Applications

•Backlight for:

–Automotive infotainment and clusters

–Smart mirrors

–Central Information Display (CID)

–Head-up display (HUD)

–Camera Monitoring Systems

3 Description

The LP8873-Q1 is an automotive high-efficiency, low-

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

DC power switch. The DC-DC converter supports

both boost and SEPIC topology configuration. The

four high-precision current sinks support PWM 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 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 boost voltage to the

lowest sufficient level in all conditions.

The LP8873-Q1 supports built-in hybrid PWM

dimming and analog current dimming, which reduces

EMI, extends the LED lifetime, and increases the total

optical efficiency.

Device Information

PART NUMBER

(1)

PACKAGEBODY SIZE (NOM)

LP8873-Q1

HTSSOP (28)9.70mm × 4.40mm

QFN (24)

(2)

4.00mm × 4.00mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

(2)Product preview.

L

LP8873-Q1

V

IN

C

OUT

C

IN

V

OUT

VINN

R

ISENSE

MCU

I2C

C

VDD

R

FB1

R

FB2

R

ISET

R

MODE

R

FSET

VINP

VDD

ISET

COMP

EN/SYNC

PWM

FAULT

SDA

SCL

MODE

FSET

LED4

LED3

LED2

LED1

LED_GND

DISCHARGE

FB

PGND

SW

SD

Simplified Schematic

LP8873-Q1

SLVSJ95 – JULY 2025

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.

Product specificaties