LP8862-Q1

FB

PWM

OUT1

L1

D1

4.5...40 V

SD

VSENSE_N

Up to 160 mA/string

SW

LDO

FSET

VDDIO/EN

PGND

GND

PAD

VIN

ISET

FAULT

VDDIO

FAULT

Q1

R1

R2

BRIGHTNESS

SYNC

EN

OUT2

Brightness (%)

0

10

20

30

40

50

60

70

80

90

100

50

55

60

65

70

75

80

85

90

95

D001

VIN=5V

VIN=8V

VIN=12V

VIN=16V

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LP8862-Q1

SNVSA75A – NOVEMBER 2015 – REVISED NOVEMBER 2015

LP8862-Q1 High-Performance 2-Channel LED Driver for Automotive Lighting

1 Features

3 Description

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

1

•

Qualified for Automotive Applications

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

•

AEC-Q100 Qualified With the Following Results:

converter. The DC-DC supports both boost and

–

Device Temperature Grade 1: –40°C to 125°C

SEPIC modes of operation. The device has two high-

Ambient Operating Temperature Range

precision current sinks that can provide high dimming

ratio brightness control with a PWM input signal.

–

Device HBM ESD Classification Level 2

The DC-DC converter has an adaptive output voltage

–

Device CDM ESD Classification Level C4B

control based on the LED current sink headroom

•

Input Voltage Operating Range 4.5 V to 40 V

voltages. This feature minimizes power consumption

•

Two High-Precision Current Sinks

by adjusting the voltage to the lowest sufficient level

–

Current Matching 1% (Typical)

in all conditions. DC-DC supports spread spectrum

for

switching

frequency

and

an

external

–

Output Current up to 160 mA/Channel

synchronization with a dedicated pin. The high

–

Dimming Ratio 10 000:1 at 200 Hz

switching frequency allows the LP8862-Q1 to avoid

•

Integrated DC-DC for LED String Power

disturbance for AM radio band.

–

Boost and SEPIC Modes Supported

The input voltage range for the LP8862-Q1 is from

–

Output Voltage up to 45 V

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

load dump conditions. The device supports PWM

–

Switching Frequency 300 kHz to 2.2 MHz

brightness dimming ratio 10 000:1 for 200-Hz input

•

EMI Minimization With Optional DC-DC

PWM

frequency.

The

LP8862-Q1

integrates

Synchronization Input or Spread Spectrum

extensive fault detection features. The device has an

•

Power-Line FET Control for Inrush Current

option to drive an external p-FET to disconnect the

Protection and Standby Energy Saving

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

This feature also reduces inrush current and standby

•

Extensive Fault Detection Features

power consumption.

–

Fault Output

–

Input Voltage OVP, UVLO, and OCP

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

Open and Shorted LED Fault Detection

LP8862-Q1

HTSSOP (20)

6.50 mm x 4.40 mm

–

Thermal Shutdown

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

•

Minimum Number of External Components

the end of the data sheet.

2 Applications

Automotive Infotainment, Instrument Cluster and

Backlighting Systems

Simplified Schematic

System Efficiency

1

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.