| Pin Number | Function | Expected Voltage (Operational) | | :--- | :--- | :--- | | 1 | VCC (Power Supply) | 12V | | 2 | N/C or Ground | 0V | | 4 | | N/A | | 5 | Feedback/Enable | 2.5V | | 9 | Over-Voltage Protection (OVP) | 1.55V | | 10 | Dimming/PWM Input | 3.1V |
Power Supply Input. This pin accepts the incoming low-voltage rail (typically 12V) required to power the internal control logic of the IC. sn51dp datasheet
The SN51DP PDF Datasheet layout allocates a specific regulatory or protective task to each of its 10 functional pins: | Pin Number | Function | Expected Voltage
High-speed pulse width modulation with programmable resolution up to 8-bits . The datasheet primary application is buck
The datasheet primary application is buck. While theoretically possible, no official reference design exists for boost. Use a dedicated boost controller instead.
Constantly "feels" the current flow, ensuring the LEDs don't burn out from over-excitement. Pin 8 (COMP):
Finding an exact SN51DP replacement can be difficult. If you are repairing a board and cannot source the original, consider these (check pinout compatibility first):