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PDF WS9224 Data sheet ( Hoja de datos )
| Número de pieza | WS9224 | |
| Descripción | High Precision PSR Constant Current LED Driver | |
| Fabricantes | Winsemi | |
| Logotipo |  |
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WS9224ProductDescription
High Precision PSR Constant Current LED Driver
Features
Built-in 650V Power MOSFET
Constant current control without secondary sense and
feedback circuit.
No Auxiliary winding for sensing and supplying
Ultra low operating current to improve efficiency
Universal input voltage
±5% LED current accuracy
LED short and open circuit protection
VCC under-voltage protection
Over temperature protection
Available in SOP-7 package
Applications
LED bulb, spot light
Other LED lighting
Description
The WS9224 is a high precision primary-side feedback
and regulation controller for LED lighting, it operates in
constant current control mode and is designed to work in
inductor current discontinuous conduction mode and
especially suitable for fly back convertor under universal
input.
The WS9224 integrates 650V power MOSFET. Since
adopting primary sense and feedback control technology, the
secondary sense and feedback circuit is eliminated. The loop
compensation components are also removed while
maintaining stability overall operating conditions.The
operating current is very low, and it doesn’t need the auxiliary
winding for sensing the output current and supplying the chip.
The low component counts and small system size are
realized.
Since using the proprietary high accurate current sense
method, the WS9224 realizes ±5% accuracy of LED current
along with excellent line and load regulation.
The WS9224 offers rich protection functions including
LED open/short circuit protection, over-temperature
protection, VCC under voltage protection.
Typical Application
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
Copyright@WinsemiMicroelectronics Co.,Ltd.,All rightreserved
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
0328
1 page  
WS9224ProductDescription
possible to reduce EMI radiation, such as the primary
current loop, the snubber circuit and the secondary rectifying
loop.
NC Pin
The NC pin must be left floating to satisfy the
requirement of creepage distance.
Drain pin
To increase the copper area of drain for thermal
consideration.
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
www.winsemi.com Tel : +86-755-8250 6288 Fax : +86-755-8250 6299
WINSEMI MICROELECTRONICS
WINSEMI MICROELECTRONICS
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5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet WS9224.PDF ] | |
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