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Silan Microelectronics

SD4851 Datasheet Preview

SD4851 Datasheet

PRIMARY SIDE POWER CONTROLLER

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SD4851
PRIMARY SIDE POWER CONTROLLER WITH BUILT-IN HIGH VOLTAGE
MOSFET
DESCRIPTION
SD4851 is primary side power controller with built-in high voltage
MOSFET. It senses the output voltage indirectly by using the
auxiliary wind of the power transformer. It adopts Pulse Frequency
Modulation (PFM) technology for flyback power supply controller.
SD4851 provides accurate constant voltage, constant current
(CV/CC) regulation for higher efficiency and higher reliability.
By using SD4851 for flyback power controller, Few peripheral
components are needed, the Opto-coupler and secondary control
circuitry is not needed and the loop compensation circuitry for
maintaining stability is also unnecessary.
DIP-8A-300-2.54
FEATURES
* Lower start-up current
* Primary side control for Constant Voltage (CV) and Constant
Current (CC)
* Leading edge blanking
* Pulse-Frequency Modulation
* Overvoltage protection
* Undervoltage lockout
* Over temperature protection
* Built-in high voltage MOSFET
* Cycle by cycle current limiting
* Open Loop Protection
* Cable drop compensation
* Peak current compensation
APPLICATIONS
* Chargers for Cell Phones
* Adapters
* MP3 and Other Portable Apparatus
* Standby Power Supply
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
REV:1.0 2009.04.27
Page 1 of 11




Silan Microelectronics

SD4851 Datasheet Preview

SD4851 Datasheet

PRIMARY SIDE POWER CONTROLLER

No Preview Available !

ORDERING INFORMATION
SD4851
Part No.
SD4851DD3
SD4851DD3G
SD4851DD35
SD4851DD35G
SD4851DD4
SD4851DD4G
Package
DIP-8A-300-2.54
DIP-8A-300-2.54
DIP-8A-300-2.54
DIP-8A-300-2.54
DIP-8A-300-2.54
DIP-8A-300-2.54
BLOCK DIAGRAM
Marking
SD4851DD3
SD4851DD3G
SD4851DD35
SD4851DD35G
SD4851DD4
SD4851DD4G
Output power
3W
3W
3.5W
3.5W
4W
4W
Material
Pb free
Halogen free
Pb free
Halogen free
Pb free
Halogen free
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
REV:1.0 2009.04.27
Page 2 of 11


Part Number SD4851
Description PRIMARY SIDE POWER CONTROLLER
Maker Silan Microelectronics
Total Page 11 Pages
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