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WINSEMI MICROELECTRONICS

WINSEMI MICROELECTRONICS

WINSEMI MICROELECTRONICS

WINSEMI MICROELECTRONICS

WINSEMI MICROELECTRONICS

the system will restart again. If the fault condition is removed,

the system will recover to normal operation.

Line Voltage Compensation

The WS9441 integrates line voltage compensation

function, which makes LED current remain unchanged in the

range of full voltage with good line regulation and current

accuracy.

PCB Layout

The following rules should be followed in WS9441 PCB

layout:

VCC Capacitor: The VCC capacitor should be as close

as possible to the VCC Pin and GND pin.

Ground Path: The power ground path for current sense

resistor should be short, and the power ground path should be

separated from small signal ground path before connecting to

the negative node of the bulk capacitor.

The Area of Power Loop: The area of main current loop

should be as small as possible to reduce EMI radiation. And it

should be away from diodes and other heating components.

ROVP PIN: The ROVP resistor should be as close as

possible to the ROVP Pin to increase its resistance to prevent

from the interference.

DRAIN PIN: The copper area of DRAIN pin can be

increased for better thermal dissipation. And it should be away

from CS/VCC and ROVP Pin.