Dual voltage solution development

Dual voltage solution development

PT1910 is a dual-voltage input constant power linear LED driver IC, which can be adapted to both 120V and 220V power grids at the same time, with a maximum input voltage of 400V, suitable for driving voltage and low current LED loads. The application scheme has very few external components and compact layout. It can be easily and flexibly applied to various small-sized or flat LED products. It can provide 5~100mA peak current. At the same time, the simple linear driving method does not require magnetic components, which is well avoided. EMI interference problem;

PT1910 integrates power MOS, which can monitor the line network voltage in real time, and can achieve the effect of inputting constant power; PT1910 also integrates PWM dimming function, which has good linear PWM dimming characteristics. In order to prevent IC overheating and damage, PT1910 integrates intelligent temperature control function. When the internal junction temperature of the IC rises to 130°C, PT1910 starts to reduce the output current. When the junction temperature reaches 153°C, the output current will be reduced to zero. This can avoid the lamp flickering problem of traditional over-temperature protection methods.