The SN51DP typically comes in a small-outline package (SOP-10) configuration. Because it operates as a sophisticated driver and controller for LED strings, precise pin function tracking is required for voltage testing and diagnostics.
| Parameter | Symbol | Rating | Unit | | :--- | :--- | :--- | :--- | | Input Voltage | VIN | 45 (60 for -H variant) | V | | Switch Output Voltage | VSW | VIN + 0.5 | V | | Feedback Voltage | VFB | -0.3 to +7 | V | | Peak Switch Current | ISW(peak) | 4.5 | A | | Power Dissipation (Tc=25°C) | PD | 25 | W | | Operating Temperature | Topr | -20 to +125 | °C | | Storage Temperature | Tstg | -40 to +150 | °C |
In standard TV architectures (such as Felix, Crown, or Arielli models), the SN51DP functions as the core brain of the boost-converter block. sn51dp datasheet
Some variants may swap pins 4 and 5 or include an enable function. Always verify with a multimeter and known schematic.
The SN51DP itself generates minimal heat, but the external power MOSFET can become quite hot during operation. Consider these thermal guidelines: The SN51DP typically comes in a small-outline package
The if it differs from the standard TP.S506.PB801 layout.
If a TV exhibits "backlight fail" (sound but no image), or the backlight flashes briefly, the SN51DP or its surrounding components (mosfet, sense resistors) are often the culprits. 5. Summary and Equivalent Components The SN51DP is a robust solution for LED backlighting. Often associated with On-Bright (ON-Brigh). Some variants may swap pins 4 and 5
: Drives the external N-channel MOSFET switch to modulate power across the backlight step-up inductor.
Acting as a general-purpose controller in various pulse-modulated power stages.