A8517
Wide Input Voltage, Fault Tolerant, Independently Controlled
Multi-Channel LED Driver with I2C interface
DESCRIPTION
FEATURES AND BENEFITS
• AEC-Q100 qualified
TheA8517isaprogrammablemulti-outputLEDdriver, which
canbeusedforavarietyofLEDDriverapplications.Itintegrates
acurrent-modeboostconverterwithinternalpowerswitchand
10 current sinks. The IC operates from 4.5 to 36 V, and is able
to withstand up to 40 V load-dump conditions encountered in
automotive systems.
• Wide input voltage range of 4.5 to 36 V
• Operates down to 3.9 V (VIN falling) for idle stop, and up
to 40 V for load dump
• Integrated boost converter with DMOS switch and OVP
protection up to 39 V
• 10 fully integrated LED current sinks, with individually
programmable current up to 60 mA per channel
• I2C™ interface for programming LED current, PWM
dimming, and various protection thresholds per channel
• Ability to drive multiple loads from a single IC
• Extensive PWM dimming (up to 10,000:1 at 100 Hz),
individually programmable for each channel
• Extensive diagnostics and fault reporting
The I2C interface allows the user to set the LED currents
individually, upto60mAperLEDchannel. Adjacentchannels
may be combined to drive higher-current LED strings. The
PWM dimming duty cycle is independently controlled for
each LED channel, and each channel can be enabled/disabled
independently if needed.
This flexibility makes the A8517 a single solution for a wide
range of LED applications, in some cases offering the ability
to replace two or more LED driver ICs with a single device.
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PACKAGE:
28-pin TSSOP with exposed thermal pad
(suffix LP)
APPLICATIONS:
Automotive:
• Infotainment
• Cluster
• Center-stack lighting
• Head-up display (HUD)
• Daytime running lights (DRL)
Not to scale
V
(4.5 to 36 V)
CIN
IN
VOUT
D1
L1
R
A
SENSE
CQ1
Q1
A
COUT
SW
GATE
PGND
INS
VIN
EN
A8517
OVP
LED1
LED2
VDD
CVDD
ADDR
PAD
R
ADDR
SDA
SCL
2
LED10
I C Interface
COMP
GND
External
FSET/SYNC
Synchronization
R
Z
V
C
R
B
FSET
C
P
FLAG GPO1 GPO2 AGND
C
Z
Status
Interrupt
/
A Optional
B External pull-up voltage, or
connected to VDD
Typical Application Drawing
A8517-DS, Rev. 9
February 10, 2017