SD6601AS

Features

SD6601AS is a high-precision, low-cost primary-side feedback LED constant current driver chip used in flyback isolation LED lighting.

The chip works in the inductor current discontinuous mode, suitable for 90Vac~265Vac input voltage, 1~3W output power; 176Vac~265Vac input voltage, 3~5W output power.

SD6601AS adopts a unique constant current control method, with a current accuracy of less than ±3%, and the output current can be set by the peak current sampling resistor. The chip integrates a 650V power MOS switch and adopts a primary feedback control mode. It does not require loop compensation, optocouplers, TL431, transformer auxiliary windings and other components, saving system cost and volume.

The chip integrates LED open/short circuit protection, primary side overcurrent protection, overvoltage protection, overtemperature protection, etc. to improve the reliability of the system.

SD6601AS adopts SOP-7-255-1.27 package.

High precision and low cost PSR LED constant current driver

±3% LED output current accuracy

Primary-side feedback control technology without auxiliary winding

High efficiency, low system cost

Internally integrated 650V power tube

Built-in line voltage compensation

No loop compensation required

Built-in leading edge blanking circuit

LED short circuit/open circuit protection

Primary side cycle-by-cycle overcurrent protection

CS pin short circuit protection

Undervoltage protection

Over temperature protection

Parameters

Output power (W): 3

Input voltage (VAC): 90-265

Topology mode: PSR, transformer double winding

Power tube: IN MOS

Current accuracy: ±3.0%

Package type: SOP7

Application

Spotlights, bulbs