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LP8862-Q1 Datasheet(PDF) 1 Page - Texas Instruments

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Part # LP8862-Q1
Description  High-Performance 2-Channel LED Driver
Download  37 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP8862-Q1 Datasheet(HTML) 1 Page - Texas Instruments

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LP8862-Q1
FB
PWM
OUT1
L1
D1
VOUT up to 45 V
4.5...40 V
COUT
SD
VSENSE_N
RISET
Up to 160 mA/string
SW
LDO
FSET
VIN
VDDIO/EN
PGND
GND
PAD
VIN
RISENSE
ISET
FAULT
VDDIO
FAULT
RFSET
Q1
R1
R2
RGS
CLDO
BRIGHTNESS
SYNC
EN
CIN
CIN BOOST
OUT2
CFB
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
Product
Folder
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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.


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