Sn51dp Datasheet High Quality -

Full pinout available in the official datasheet.

Dimming control input (usually receives the PWM signal from the main board). OVP: Over-Voltage Protection connection. sn51dp datasheet high quality

As noted in electronic repair forums, failure of the SN51DP can result in complete failure of the backlight system in LED TVs, manifesting as a "black screen" or "no backlight" issue despite working power supply stages. Full pinout available in the official datasheet

At 4W dissipation (e.g., 800V * 5mA switching losses), junction temperature rises 320°C above ambient without heatsink → impossible. A heatsink or copper area on drain pins is mandatory. 800V * 5mA switching losses)

A: No – UC3842 requires an external MOSFET and has different startup current requirements. The SN51DP’s internal 700V MOSFET and high-voltage startup are unique.