DataSheet.es    


PDF AAT2430B Data sheet ( Hoja de datos )

Número de pieza AAT2430B
Descripción 16 Channel White LED Driver Solution
Fabricantes Skyworks 
Logotipo Skyworks Logotipo



Hay una vista previa y un enlace de descarga de AAT2430B (archivo pdf) en la parte inferior de esta página.


Total 3 Páginas

No Preview Available ! AAT2430B Hoja de datos, Descripción, Manual

PRODUCT SUMMARY
AAT2430B
16 Channel White LED Driver Solution with LED Current and Timing Control
General Description
The AAT2430B is a highly integrated, high efficiency white
LED backlight solution for large size LCD panels used in
LCD TVs. By controlling external power MOSFETs (such as
the Skyworks' AAT2491 high-voltage TrenchDMOS
array), the AAT2430B facilitates 16 current sink channels
to provide precision constant-current drive for strings of
white LEDs, where the number of series-connected LEDs
per string is only limited by the system LED voltage sup-
ply. Current in each backlight string and string-to-string
matching is controlled using I-Precise™ sensing and con-
trol circuitry, a novel on-chip method to accurately control
drain current in external discrete power MOSFETs inde-
pendent of their construction and without the need for
precision sense resistors.
A 15MHz SPI compatible interface allows fast, indepen-
dent digital control of each current sink. Full scale LED
current is programmed using an external resistor. DOT
correction may be applied globally to all sink channels
with 8-bit resolution. Both phase delay and grayscale
clock (GS Clock) PWM on-time are user programmable
with 12-bit resolution for each current sink channel.
Timing and synchronization are determined by exter-
nally applied VSYNC and GS Clock signals.
The AAT2430B provides latched fault handling and fault
reporting through the SPI interface and fault flag output
pin. The fault detection system reports open or short cir-
cuit LED strings and over-temperature events. The short
circuit LED detection threshold is user programmable.
The LED string supply voltage may be regulated by using
the voltage or current mode current sense feedback sig-
nal to the LED voltage regulator. This analog signal rep-
resents the highest VF string of LEDs. Thermal protection
circuitry shuts down the device in the event of an over-
temperature condition.
The AAT2430B is available in the Pb-free, thermally
enhanced 64-pin 9mm x 9mm QFN and 64-pin 14mm x
14mm LQFP packages.
Features
VIN Range: 10.8V – 28V
16 Programmable LED Current Sinks
±1.5% Accuracy @ RSET = 3.01kΩ
±1.5% Matching @ RSET = 3.01kΩ
SPI Interface
Digitally Programmable Individual Channels
Up to 15MHz Clock Speed
Read/Write Registers
High Resolution Digital Control for Individual
Channels
12-bit Resolution Grayscale PWM Brightness
12-bit Resolution Channel Phase Delay
8-Bit Resolution Global Current Setting
(Dot Correction)
VSYNC PWM and Delay Synchronization
Device Addressing
4 Possible Address Settings
Up to 64 Current Sinks
Integrated Fault Protection
Open Circuit LED(s)
Programmable Short LED Threshold
Over-Temperature Protection
9mm x 9mm 64-pin QFN Package with 0.5mm pitch
or 14mm x 14mm 64-pin Low Profile QFP Package
with 0.8mm pitch
Applications
Large Size LCD TVs, Panels
White LED Backlight, Dynamic Edge LCD TV Backlight
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
201968A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 18, 2012
1

1 page





PáginasTotal 3 Páginas
PDF Descargar[ Datasheet AAT2430B.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
AAT2430B16 Channel White LED Driver SolutionSkyworks
Skyworks
AAT2430C16 Channel White LED Driver SolutionSkyworks
Skyworks

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar