|
|
PDF RT8453 Data sheet ( Hoja de datos )
| Número de pieza | RT8453 | |
| Descripción | High Voltage Buck LED Driver | |
| Fabricantes | Richtek | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de RT8453 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
Conceptual
RT8453
High Voltage BUCK LED Driver
General Description
The RT8453 is a Buck current mode PWM regulator for
LED driving applications. It has a 1.5A switch on board
and can be operated with wide input range from 4.5V to
40V. With a 800kHz operating frequency, the external
PWMinductor and input/output capacitors can all be small.
High efficiency is achieved with a 190mV current sensing.
Dimming can be either analog or PWM digital signal driven.
The RT8453 is available in SOP8 (Exposed pad) package.
Features
z High Voltage : VIN up to 40V
z 1.5A Switch Current
z Current Mode PWM with 800kHz Switching
z Frequency
z Easy Dimming : Analog or Digital method
z Programmable Soft Start to Avoid Inrush Current
z VIN Under Voltage Lockout and Thermal Shutdown
z RoHS Compliant and Halogen Free
Ordering Information
RT8453
Package Type
SP : SOP-8 (Exposed Pad-Option 2)
Operating Temperature Range
G : Green (Halogen Free with Comme-
rcial Standard)
Note :
Richtek Green products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Applications
z GPS, Portable DVD Backlight
z Desk Lights and Room Lighting
z Industrial Display Backlight
Pin Configurations
(TOP VIEW)
ISN
VC
ACTL
EN
8
27
GND
36
9
45
VCC
SW
GND
SS
SOP-8 (Exposed Pad)
Typical Application Circuit
VIN
4.5V to 40V
Analog
Dimming
5V
R1
10k
C2
3.3nF
C1
RT8453
8 VCC
ISN 1
3 ACTL
R2
190mV
R3 R4
4 EN
2 VC
5 SS
C3
10nF
SW 7
L
22uH
6, Exposed Pad (9)
GND
C4
Figure 1. Analog Dimming BUCK Configuration
DS8453-00C March 2009
www.richtek.com
1
1 page  
Conceptual
RT8453
Parameter
Maximum Duty Cycle (Note 5)
SW On-Voltage
SW Current Limit
Soft Start
Soft Start SS Pin Current
Symbol
Conditions
VSW
ILI M_S W
ISW = 0.5A
ISS VSS ≤ 2V
Min Typ Max Unit
-- 86 -- %
-- 0.4 -- V
1.25 1.5 -- A
-- 6 -- μA
Note 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Note 2. Devices are ESD sensitive. Handling precaution is recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. θJA is measured in the natural convection at TA = 25°C on a high effective four layers thermal conductivity test board of
JEDEC 51-7 thermal measurement standard.
Note 5. When the natural maximum duty cycle of 1MHz switching frequency is reached, the switching cycle will be skipped
(not reset) as the operating condition requires to effectively stretch and achieve higher on cycle than the natural
maximum duty cycle set by the 1MHz switching frequency.
DS8453-00C March 2009
www.richtek.com
5
5 Page 
Datasheet Revision History
Version
Data Page No.
00C 2009/3/18
Conceptual
RT8453
Item
Description
first edition
DS8453-00C March 2009
www.richtek.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet RT8453.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| RT8450 | High Voltage Multi-Topology LED Driver | Richtek |
| RT8450B | High Voltage Multi-Topology LED Driver | Richtek |
| RT8452 | High Voltage High Current LED Driver Controller | Richtek |
| RT8453 | High Voltage Buck LED Driver | Richtek |
| 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 |