Dimmable LED controller IC with DIM pin
The SSL5511T is an offline dimmable controller IC, intended to drive dimmable LEDs in general lighting applications, like remote-controlled luminaires and smart lamps.
The IC drives an external switch for easy power scaling. It has been designed to start up directly from the High-Voltage (HV) supply by an internal high-voltage current source. Flyback, buck and buck-boost circuit topologies are supported. Primary side sensing provides accurate output current control.
The IC can detect analog signals (according to IEC60929 annex E) or digital control signals and translate them to a continuous LED current in multiple ways. It can operate in three switching modes at two switching frequency ranges. It offers tradeoffs between the output current ripple, the mains current Total Harmonic Distortion (THD) and the application size. The IC incorporates many protection features.
|fsw||switching frequency||low-frequency mode; 50 Hz mains||65||kHz|
|fsw||switching frequency||low-frequency mode; 60 Hz mains||78||kHz|
|fsw||switching frequency||high-frequency mode; 50 Hz mains||98||kHz|
|fsw||switching frequency||high-frequency mode; 60 Hz mains||119||kHz|
|VCC||supply voltage||operating range||9||32||V|
|Pin||Symbol||Description||Simplified outline||Graphic symbol|
|1||RMAINS||mains detection input|
|2||VCC||IC supply input/output|
|3||DIM||dim-level control input|
|4||TST||IC test pin, to be connected to ground in application|
|5||ISNS||peak current sense input|
|6||PWRDRV||external MOSFET gate driver output|
|8||DRAIN||external MOSFET drain sense input|
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