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SIC9653

High Precision PSR Constant Current LED Driver

Model

Isolated

PFC

Integrated Transistor

Pacakge

Application

PDF 

SIC9653

Y

 

MOSFET,650V/0.8A

SOP-8

5-7W

 

GENERAL DESCRIPTION
The SIC9653 is a high accuracy edge feedback LED constant current driver chip, suitable for 176 Vac ~ 265 Vac full range of input voltage, offering power under 7W flyback type isolation LED constant current power supply.
The SIC9653 was built in a high precision of sampling and compensation circuit, enables the circuit to achieve constant current accuracy around + / - 3%. It also has excellent linear regulation and load regulation. Through the external RADJ pin, the resistor can easily control the LED open circuit protection voltage.
The SIC9653 has internal integration for 650V power MOSFET, design as original double winding feedback mode, it can work without secondary feedback circuit. It also doesn’t need the compensation circuit. Combined with the precise and stable adaptive technology, it makes the system peripheral structure very simple with few peripheral devices. The wide range of parameters makes it easy to achieve high precision under condition of constant current control. Such design has greatly saving the system cost and size. At the same time it can ensure the consistency of the LED lamps and lanterns parameters during mass production.
The SIC9653 has many protection functions: output short circuit protection, sampling resistor short-circuit protection, under-voltage protection and output over-voltage protection, over temperature adaptive adjustment and etc.

FEATURES
· Internal integration 650V Power MOSFET
· ±3% LED Output Current Accuracy
· Original edge feedback constant current control,
without secondary feedback circuits
· Without auxiliary winding and power supply
· LED open-circuit voltage adjusted through
the external resistors
· Ultra-Low operating current
· Output short circuit protection
· Short open sampling resistance
· Output over-voltage protection
· Under-voltage protection
· Over-heat adaptive adjustment function
· Concise system topology with few peripheral
devices
· Wide range of input voltage

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