A8513
Wide Input Voltage Range, High Efficiency
Fault Tolerant LED Driver
Description
Features and Benefits
• AEC-Q100 Qualified
The A8513 is a single-output white LED (WLED) driver for
• Wide input voltage range of 4.5 to 40 V for start/stop,
cold crank and load dump requirements
• Boost converter switching frequency up to 2 MHz,
allowing operation above the AM band
• Excellent input voltage transient response
• Internal secondary OVP for redundant protection
• Fully integrated LED current sink and boost converter with
60 V DMOS FET
• Maximum LED current of 150 mA
• Drives up to 14 series LEDs
• Single EN/PWM pin interface for PWM Dimming and
Enable function
LCDbacklighting.Itintegratesacurrent-modeboostconverter
with an internal power switch and one current sink. TheA8513
can operate from a single power supply from 4.5 to 40 V,
to accommodate start/stop, cold crank, and load dump
requirements. A 2 MHz boost converter switching frequency
allows the A8513 to operate above the AM radio band.
If required, the fault flag can be used as part of a circuit to drive
anexternalP-FETtodisconnecttheinputsupplyfromthesystem
in the event of a fault. The A8513 provides protection against
output short and overvoltage, open or shorted diode, open or
shorted LED pin, shorted boost switch or inductor, shorted
ISET resistor, and IC overtemperature. A dual level cycle-by-
cycle current limit function provides soft start and protects the
internal current switch against high current overloads.
• 5000:1 PWM dimming at 200 Hz
Continued on the next page…
TheA8513 is provided in a 10-pin MSOPpackage (suffix LY)
and a 16-pin TSSOP package (suffix LP). Both packages have
an exposed thermal pad for enhanced thermal dissipation, and
are lead (Pb) free, with 100% matte tin leadframe plating.
Packages:
Applications:
16-pin TSSOP
with exposed thermal pad
(LP package)
• LCD backlighting for:
▫ Automotive infotainment
▫ Automotive cluster
▫ Automotive center stack
▫ Industrial LCD displays
▫ Portable DVD players
▫ Flatbed Scanners
Not to scale
10-pin MSOP
with exposed thermal pad
(LY package)
▫ LED Lighting
Typical Application Circuit
VOUT
V
IN
C
L1
D1
IN
SW
R
R
OVP1
VIN
Boost fSW
(MHz)
VIN (min)
(V)
LEDs per
String (max)
V
C
A8513
C
OUT
OVP
VDD
0.25/0.5/1
5
10
8
14
14
12
9
C
VDD
OVP2
PAD
2
2
2
2
FAULT
EN/PWM
ISET
LED
6
COMP
5
7
R (Optional)
Z
R
ISET
C
P
GND
C (Optional)
Z
A8513-DS Rev. 2