General-purpose pulse-width modulation control systems .
The SN51DP is typically used in circuits where precise, digital control of power is necessary:
: Commonly found in MSOP-10 or MSOP-8 surface-mount packages. sn51dp datasheet
Feedback pin. Monitors voltage drop across the current-sense line to ensure highly accurate, constant-current regulation. CS
The SN51DP operates as a peak current-mode controller. When turned on, power to the boots internal references. The GATE driver sends pulses to turn the external MOSFET on and off. This cycles energy through a step-up inductor, boosting the input rails (often 12V) up to the higher forward voltages required by multi-diode TV LED strips. General-purpose pulse-width modulation control systems
, is a standalone IC designed to bridge the gap between digital control logic and analog execution.
Many users and technicians reduce the current to LED drivers to extend the lifespan of the LEDs and reduce heat. With the SN51DP, this is achieved by modifying the current sense resistors. By increasing the resistance value of the low-ohm resistors in the LED return path (e.g., RB837, RB838, RB839, RB840), you proportionally . For example, removing one pair of 1.5 and 1.6 Ohm parallel resistors can reduce current consumption from 260mA to approximately 176mA. Monitors voltage drop across the current-sense line to
If the backlight flashes and shuts down, monitor the voltage at the FB (Pin 5) pin upon startup. A sudden voltage spike that exceeds the OVP threshold will force the IC to latch off. Sourcing and Replacement
In the world of power electronics, finding a reliable and efficient switching regulator IC is crucial for any design. While many components come and go, certain part numbers—like the —maintain a quiet but significant presence in power supply designs, particularly in Japanese and Asian market equipment. If you have landed on this article, you are likely searching for the SN51DP datasheet . Whether you are repairing a power supply, designing a new DC-DC converter, or cross-referencing a part, understanding the raw technical data of this IC is essential.
The manufactured by ON-BRIG. It functions as a specialized standalone pulse width modulation (PWM) LED driver. It is widely deployed in liquid crystal display (LCD) applications, specifically managing LED TV backlight driver assemblies. Common hardware environments using this chip include mainboards like the TP.S506.PB801 and TP.MS3463S.PB801 , found inside Arielli, Crown, Felix, and Thomson television sets. Core Specifications and Operating Parameters