|
|
PDF LM3466 Data sheet ( Hoja de datos )
| Número de pieza | LM3466 | |
| Descripción | Smart Linear LED Driver | |
| Fabricantes | National semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM3466 (archivo pdf) en la parte inferior de esta página. Total 4 Páginas | ||
|
No Preview Available !
LM3466
PRELIMINARY
June 1, 2011
Smart Linear LED Driver for Multi-Channel LED Systems
General Description
The LM3466 integrates a linear LED driver for lighting sys-
tems which consist of multiple LED strings powered by a
constant current power supply. The current provided by the
supply is equalized in a pre-set ratio to each active LED string
(an active LED string refers to a fully turn-on LED string) dis-
regarding the number of string connected to the supply, even
the forward voltage of each LED string is different. If any LED
string opens during operation, the LED current of all remain-
ing active LED strings can equalize the current of the supply
automatically. As a result, the overall brightness of the lighting
system is maintained even if some LED strings open during
operation.
The lighting system using the LM3466 is simple to design
owing to a proprietary control scheme. To minimize the com-
ponent count, the LM3466 integrates a 70V, 1.5A N-channel
MOSFET. To add one more LED string to the system, only a
resistor, a capacitor and an LM3466 are required. Other su-
pervisory features of the LM3466 include under-voltage lock-
out, current limit, fault reporting, and thermal shutdown
protection.
The LM3466 consists of only linear circuitry so that the EMI
of the application circuit is not deteriorated. The LM3466 is
available in the PSOP-8 exposed DAP packages.
Features
■ Easy to design and use for lighting systems consists of
multiple LED strings
■ Works with a Constant Current power supply. No
communication to/from the constant current power supply
is required
■ Automatically equalizes the current of every active LED
string, even the forward voltage of each string is different
■ Total luminance output of the system is nearly not affected
if some LED strings open during operation
■ Wide input voltage range from 6V to 70V
■ Integrated 70V 1.5A MOSFET with 2A current limit
■ Operating with minimum voltage overhead to maximize
power efficiency
■ Fault status output
■ Thermal Shutdown
■ Linear circuitry does not introduce EMI problem
■ Thermal enhanced PSOP-8 with exposed DAP packages
Applications
■ Streetlights
■ Solid State Lighting systems
Typical Application
www.DataSheet4U.com
© 2011 National Semiconductor Corporation 301589
30158901
www.national.com
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet LM3466.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM346 | PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIERS |  STMicroelectronics |
| LM346 | LM146/LM346 Programmable Quad Operational Amplifiers (Rev. B) |  Texas Instruments |
| LM3460 | Precision Controller for GTLp and GTL Bus Termination |  National Semiconductor |
| LM3460 | LM3460-1.2 -1.5 Precision Controller for GTLp and GTL Bus Termination (Rev. D) | Texas Instruments |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 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, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |