Texas Instruments LP8865Z-Q1 Handleiding

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LP8865-Q1 Automotive Multi-Topology LED Driver with Inductive Fast Dimming

1 Features

•AEC-Q100 Qualified for automotive applications:

–Temperature grade 1:

–40°C to +125°C, T

A

•Integrated MOSFET for buck, buck-boost and

boost topology

–Wide input voltage: 4.5V to 65V

–Integrated 2.6A and 150mΩ MOSFET

–Switching frequency 100kHz to 2.2MHz

–Spread spectrum for lower EMI

•High precision power FET dimming

–Up to 2A output current in buck topology

–Analog dimming (dimming ratio 256:1)

–Fast PWM dimming (150ns pulse width)

–Hybrid and flexible dimming

•Full protection features:

–Fault output

–LED open and short protection

–Cycle-by-cycle current limit

–Switching FET failure protection

–Thermal shutdown

–Configurable thermal foldback curve

2 Applications

•Automotive infotainment

•Automotive instrument clusters

•Heads-up displays (HUD)

•Automotive lighting

3 Description

The LP8865-Q1 family is a non-synchronous multi-

topology option with 4.5V to 65V wide input range.

By integrating the low-side NMOS switch, the device

is capable of driving LEDs with high power density

and high efficiency. The family also supports common

cathode connection and single layer PCB design. The

switching frequency is configurable from 100kHz to

2.2MHz, with an optional spread spectrum feature for

better EMI performance.

The LP8865-Q1 family supports four dimming options,

including analog, PWM, hybrid and flexible dimming.

Each dimming method can be configured through

the PWM and ADIM input pins by means of simple

high and low signals. The family adopts an adaptive

off-time current mode control along with smart and

accurate sampling to enable inductive fast dimming

(IFD) and achieve high dimming accuracy.

The LP8865-Q1 family also provides multiple

systematic protections, including LED open and short,

sense resistor open and short, configurable thermal

foldback and thermal shutdown. Fault output sends

out acknowledge signals as soon as any fault

condition is detected.

Package Information

PART NUMBERPACKAGE

(1)

PACKAGE SIZE

(2)

LP8865-Q1

VSON(14)4.5mm × 3mm

HVSSOP (12)

3

4mm × 4.9mm

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

the end of the data sheet.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable.

(3)Product preview

C

SENSE

SW

CSP

CSN

OVP

FSET

TEMP

COMP

PGND

AGND

VIN

VCC

EN/PWM

FAULT

ADIM/HD

LP8865X/U

R

TEMP

R

FSET

R

COMP

R

DAMP

C

COMP

R

OVP2

1nF

DR

SENSE

L

R

OVP1

C

OUT

C

VCC

C

VIN

C

IN

V

IN

= 9 - 16V

X8 LED

VCC

Typical Boost LED Driver Application Schematic

V

IN

(V)

Efficiency(%)

8910111213141516

70%

75%

80%

85%

90%

95%

100%

V

OUT

=8LED,I

LED

=0.5A

Efficiency versus Input Voltage

LP8865U-Q1, LP8865V-Q1, LP8865W-Q1

LP8865X-Q1, LP8865Y-Q1, LP8865Z-Q1

SLVSH05A – NOVEMBER 2023 – REVISED AUGUST 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