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PDF SD6900 Data sheet ( Hoja de datos )
| Número de pieza | SD6900 | |
| Descripción | NON-ISOLATED LED LIGHTING DRIVE IC | |
| Fabricantes | Silan Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SD6900 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Silan
Microelectronics
SD6900_Datasheet
NON-ISOLATED LED LIGHTING DRIVE IC WITH HIGH PFC AND HIGH
CONSTANT CURRENT ACCURACY
DESCRIPTION
SD6900 is designed for non-isolated LED driving with floating
Buck structure. With this structure, inductor current will be
sensed and closed-loop is formed with the internal error
amplifier for high constant current accuracy and high
input/output regulation rate. Also, high PF in full range is
available as its own PFC control. Boundary Conduction mode is
adopted for decreasing switching loss and improving the
conversion efficiency.
SD6900 integrates various protections, such as output open
circuit protection, output short circuit protection, cycle-by-cycle
current limit protection, over temperature protection and VCC
over voltage protection.
The start-up current and operating current are low and highlight APPLICATION
LED can be driven with high efficiency in full range
(85VAC~265VAC).
FEATURES
* Bulb Lamp
* T5/T8 LED Lamp
* Various LED Lighting
* Proprietary constant control method (Patent)
* Constant current with high accuracy for LED (<±3%)
* PF>0.9 in full voltage range
* High efficiency >93% (18W)
* Boundary-Conduction mode
* LED short circuit protection (Patent)
* LED open circuit protection
* VCC over/under voltage protection
* Over temperature protection
* Over current protection
ORDERING INFORMATION
Part No.
SD6900TR
Package
SOT-23-6L
Marking
SD6900
Material
Pb free
Packing
Tape&Reel
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0
2012.12.13
Page 1 of 8
1 page  
Silan
Microelectronics
SD6900_Datasheet
through external Comp capacitor. The on time of MOSFET is controlled by Comp voltage for adjusting
output current.
Current detection and LEB
With the cycle-by-cycle current limit function, Power MOSFET will be turned off if CS voltage exceeds a
certain value. System still works and Power MOSFET is turned on in the next period.
During LEB, limit comparator stops, and MOSFET is on during this time.
Gate driver
GATE Pin is connected to gate of external MOSFET for controlling its on/off. Too weak driving of GATE will
increase power dissipation on MOSFET and too strong driving will bring EMI. A good tradeoff is achieved
through the totem pole gate drive design with appropriate output ability and dead time control.
Output high level of GATE is clamped at 15V to protect external MOSFET.
VCC over voltage protection
Over voltage protection occurs when the voltage at VCC Pin is high, MOSFET is off and the system
restarts automatically.
Output over voltage protection
When the MOSFET is off, Output voltage is sensed by pin ZCD . When ZCD voltage is higher than 4.25V,
Output OVP occurs, MOSFET is off and the system will restart.
Output short circuit protection
When voltage on pin ZCD is below 0.5V and the state holds on for 448 on/off cycles, OUTPUT short circuit
protection occurs, MOSFET is off and the system will restart.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0
2012.12.13
Page 5 of 8
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SD6900.PDF ] | |
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