The SN51DP is widely utilized in the mainboards (such as the ) of various TV brands including Sony, Panasonic, Arielli, Crown, and Felix .
For the uninitiated, the SN51DP is a high-voltage, switching regulator control IC. It is celebrated for:
The SN51DP is widely implemented on universal LED TV combination mainboards, such as the TP.S506.PB801 platform , serving brands like Arielli, Crown, Felix, and BBK. ON-Brig Semiconductor Package Types: SSOP-10 / MSOP-10
Designed to handle standard 12V inputs common in LCD/LED TV power supplies. sn51dp datasheet high quality
The is a high-performance, specialized power management and LED driver integrated circuit (IC) manufactured by On-Bright Electronics . It is widely used for controlling high-brightness LED backlighting systems in modern LCD televisions, commercial monitors, and industrial display setups. Finding a reliable, high-quality SN51DP datasheet is essential for electrical engineers, TV repair technicians, and hardware developers seeking accurate pin configurations, electrical ratings, and system application diagrams.
This article provides a comprehensive overview of the SN51DP, exploring its technical specifications, pinout configuration, functionality, and typical applications. 1. Introduction to the SN51DP LED Driver
: In some repair scenarios, technicians bypass the IC's protection by connecting a 10K resistor from pin 9 (OVP) to GND. The SN51DP is widely utilized in the mainboards
| Parameter | Typical Value / Range | |-----------|------------------------| | | 4.5 V to 28 V (most common: 12 V or 24 V) | | Output Voltage (VOUT) | Adjustable; typical TV backlight output = 72 V–115 V | | Number of Outputs | 1 (single boost converter driving multiple LED strings) | | Switching Frequency | 100 kHz to 1 MHz (fixed or adjustable, depending on external components) | | Maximum Output Current | Up to 1.5 A to 2 A (depending on version and external MOSFET) | | PWM Dimming Input | 2.5 V typical, 2.5 V–3.3 V logic level | | Protection Thresholds | OCP sense at pin 4; OVP sense at pin 9 (typ. OVP trigger > 2 V at pin 9) | | Operating Temperature | - 40 °C to + 85 °C (industrial grade) | | Package | SSOP‑10 or TSSOP‑10 / MSOP‑10 depending on manufacturer | | RoHS Compliance | Yes (Pb‑free, “RoHs Sí”) |
SN51DP Datasheet: High-Quality LED Driver for Advanced Backlight Applications
The 10-pin package allows for a compact PCB design, making it suitable for modern thin-bezel displays and compact electronic devices. 4. Typical Applications the IC starts driving the MOSFET
According to standard SN51DP schematic literature , the pin assignments break down as follows: LED driver IC replacement.
During normal operation, 12 V is applied to pin 1. When the main processor sends a 2.5 V PWM‑REF signal to pin 5 and a PWM‑DIM signal to pin 10, the IC starts driving the MOSFET, the inductor generates a boosted voltage, and the LED+ rail rises to the designed level (often 72 V to 115 V).