: Always cross-check the pin function, not just pin count. The SN51DP pin 5 is Compensation ; many modern parts use that pin for Shutdown . Connecting incorrectly will cause instability or failure.
The manufactured by On-Bright Electronics, primarily engineered to manage high-brightness LED backlighting systems in modern LCD televisions and monitors. In the world of display panel repair, this chip is widely recognized on popular integrated mainboards, such as the TP.S506.PB801 combo board found in Arielli, Crown, Felix, and Vu LED TVs. Understanding the technical nuances of the SN51DP datasheet is vital for components procurement, circuit prototyping, and successful component-level TV repair. Core Specifications & Architecture
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: Internal Reference Voltage output or Protection Reference Adjustment.
Input for PWM or analog dimming signals to control brightness. : Always cross-check the pin function, not just pin count
: It typically operates with a supply voltage between 3.5V and 7V , with a typical center around 5V .
| 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 | Core Specifications & Architecture user wants a long
[12V Rail] ---> [Inductor] --------+--------[Diode]----> [LED Backlight +] | | [External MOSFET] | | | [GATE Pin 2] ------+ | v [OVP Pin 3] <--- [Resistor Divider]+
Compensation pin for stability of the internal error amplifier
SN51DP Pin 4 (Output) → Power Triac Gate (via 180–330 Ω resistor) SN51DP Pin 6 (Output) → Power Triac MT2 (or neutral line) Power Triac MT1/MT2 in series with load on AC line.
General-purpose pulse-width modulation control systems .