PT4121 60V，Step-down High Brightness LED Controller with 2500:1 Dimming GENERAL DESCRIPTION The PT4121 is a high efficiency step-down controller.
It is designed to operate in continuous conduction mode and drive single or multiple series connected LED efficiently from a voltage source higher than the total LED chain voltage.
It operates with a wide input voltage from 6V to 60V and provides an externally adjustable output current.
The PT4121 includes a high-side output current sense circuit, which uses an external resistor to set the nominal average output current, and a dedicated DIM input accepts either a DC voltage or PWM dimming.
The PT4121 is available in SOT23-6 packages.
FEATURES  Si...

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