S41xx series chips are dedicated chips for switching color temperature. This series of chips adopts the patented technology of Xinfeiling, which can not only simplify the number of peripheral components to the greatest extent, but also ensure the logic consistency when multiple power supplies are applied at the same time. . In order to expand the field of application, the S41xx series is not only compatible with switches such as thyristors, Darlingtons and MOSFETs, but also can be used in isolated flyback, Buck or Buck-Boost structures, providing sufficient convenience for power supply design. .

One: Scheme name: S4120T/S4120R/S4120 switch color temperature control chip

Two: Scheme brand: SDS (independent research and development)

Three: Program functions and features

1. The peripheral circuit is simple, compatible with thyristor, Darlington and MOSFET

2. The logic state is stable when multiple power supplies are used at the same time. The logical sequence of S4120T is L1->L2; the logical sequence of S4120R is L1+L2->L1->L2; L1 and L2 represent the first and second LED light strings respectively

3. Compatible with isolated and non-isolated applications

Four: program description

The S412x series is not only compatible with switches such as thyristors, Darlingtons and MOSFETs, but also can be used in isolated flyback, Buck or Buck-Boost structures, providing sufficient convenience for power supply design.

Five: Application range: LED power supply for switching color temperature (external drive MOS can be high power and high current)