High-speed digital pulse width modulation with up to 8-bit programmable resolution.
is a high-performance LED driver IC primarily used for controlling high-brightness LED backlighting in LCD TVs and monitors. Manufactured by
The is a high-performance LED backlight driver IC , commonly used in the power supply or scaler boards of modern LED TVs to control the brightness and efficiency of the display panel. The Story of the SN51DP: Reviving a VU LED TV
The TV powers on, audio is present, but no image is visible on the screen. (Shining a flashlight at the screen usually reveals the image). sn51dp datasheet verified
The chip converts raw analog rail supplies into precise high-frequency switching lines. By monitoring the internal and external ISET criteria, it modulates the external switching MOSFET to maintain consistent luminosity across varied supply tolerances. Comprehensive Load Protection
| | Package | Notes | | :--- | :--- | :--- | | SN51DP | SSOP-10 | Original part number. | | SN510P | SSOP-10 | The two part numbers are functionally identical and widely reported to be interchangeable in circuit. | | OB3350CP | SOP-8 | This part has a different package (SOP-8 vs. SSOP-10), so a direct swap is not guaranteed without a custom adapter board. |
Gate Drive Output. This pin connects to the gate of the external switching MOSFET, controlling the high-frequency switching of the main power inductor. High-speed digital pulse width modulation with up to
– Error amplifier compensation node connected to external RC networks for loop stabilization.
When diagnosing a dead backlight, always visually inspect the LED strips themselves. A single shorted or open LED on a series strip can prevent the SN51DP from starting up correctly. Replacing the SN51DP IC will not resolve the issue if a compromised LED array is continuously overloading the circuit. Conclusion
For more information and to find authorized distributors for the SN51DP, we recommend visiting Utsource's product page. Are you integrating the SN51DP into a , or The Story of the SN51DP: Reviving a VU
SN51DP Datasheet Verified: A Comprehensive Guide to the Backlight Driver IC
Supports both digital (PWM) and analog dimming interfaces for precise brightness control.
Design Note: For the latest versions of the SN51DP datasheet, visit the manufacturer’s official website or contact Vishay’s technical support.