| Pin | Name | Voltage (Measured, Operational) | Function Description | |---|---|---|---| | 1 | VIN / Power Input | ~12V | Main power supply input (typically 12V from TV board) | | 2 | GATE Drive Output | 0V (idle) | Pulse output to external MOSFET gate (QB801) | | 3 | (not documented) | – | – | | 4 | OCP – Over‑Current Protection | – | Current sense input; voltage rise triggers protection | | 5 | PWM‑REF Reference | ~1.5V – 2.5V | PWM reference voltage from main chip | | 6 | (not documented) | – | – | | 7 | LED Current Feedback | – | Feedback for LED string current regulation | | 8 | (not documented) | – | – | | 9 | OVP – Over‑Voltage Protection | ~0.8V – 1.55V | Output over‑voltage sense; threshold triggers shutdown | | 10 | PWM‑DIM Control | ~0.6V – 3.1V | PWM dimming control input (0–100% duty cycle) |
: Typically operates from 4.5V up to 24V DC.
One of the most common uses for the SN51DP is in a . This topology is ideal for generating isolated 5V, 12V, or 15V rails from a low-voltage DC source (e.g., 12V battery). sn51dp datasheet pdf %21%21EXCLUSIVE%21%21
If you are trying to troubleshoot a specific TV model, I can help you more if you tell me: The .
The IC utilizes a 10-pin package (MSOP10). Understanding the pinout is critical for troubleshooting or bypassing protections. | Pin | Name | Voltage (Measured, Operational)
If your SN51DP is a 14-pin DIP chip, the pinout typically follows standard industry pinouts.
The SN51DP is commonly housed in a compact, thermally enhanced QFN (Quad Flat No-lead) package. Understanding the pinout is critical for circuit diagnostics and oscilloscope testing. Pin Number Description Diagnostic Voltage (Normal Operation) VIN Main power supply input from the adapter/battery. 19V to 20V (Laptop standards) 2 VREG5 / V5REGA Internal 5V linear regulator output for IC logic. 5.0V stable 3 EN / ENM Master Enable signal to turn on the controller. 3.3V (Logic High) 4 FB (Feedback) Monitors output voltage via a resistor divider. Typically 0.6V to 1.2V reference 5 PGOOD Power Good open-drain output flag. 3.3V (Pulled up externally) 6 HGATE / UGATE High-side MOSFET gate driver control output. Pulsing square wave (AC) 7 PHASE / LX Switching node connected to the inductor. Pulsing square wave (AC) 8 LGATE Low-side MOSFET gate driver control output. Pulsing square wave (AC) 9 GND System ground and thermal pad connection. Typical Application Circuit If you are trying to troubleshoot a specific
Given the keyword emphasis sn51dp datasheet pdf !!EXCLUSIVE!! , this guide would be incomplete without a clear roadmap to obtaining the actual datasheet document and the physical IC.
: The boosted output voltage can exceed 70V. Exercise caution when probing live circuits and always discharge output capacitors before handling.