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The SN51DP is a high-performance LED backlight driver and power management chip primarily used in LCD and LED TV applications. It is frequently found in television models from brands like Arielli, Crown, and Felix, often integrated into mainboards such as the TP.S506.PB801. Core Specifications Manufacturer: ON-BRIG. Package Type: Available in MSOP10 and SSOP10.
Operating Voltage: Minimum supply voltage of 3.5V to a maximum of 7V. Temperature Range: Operates from -20°C to 130°C.
Pulse Width Modulation: Features standalone digital pulse width modulator (DPWM) with high-speed precision resolution. Key Technical Features
Precise Control: Programmable resolution up to 8-bits for fine-tuned power and lighting control.
Internal Protection: Includes ESD protection on I/O pins and internal connections. sn51dp datasheet high quality
Integrated Regulator: Built-in 3.3V regulator to simplify circuit design and reduce external component count.
Low Jitter: Designed for low jitter operation to ensure stable backlight performance without flickering.
Power Management: Optimized for efficiency in liquid crystal display (LCD) applications. Pin Configuration Overview
The 10-pin layout typically includes critical functions such as: VIN: Input voltage. DIM: Dimming control. GATE: Gate driver output for the external MOSFET. OVP: Over-voltage protection sense pin. CS/FB: Current sense and feedback for regulation. Datasheet Resources The SN51DP is a high-performance LED backlight driver
High-quality technical documentation can be found through professional electronics suppliers and technical databases:
Full PDF Datasheets: Available for download at Electronica Max or UTSource.
Technical Summaries: Quick reference parameters are listed on Alldatasheet. 10-50Pcs SN510P SN51DP SSOP10 IC Chip Stock Wholesale
A high-quality SN51DP datasheet will provide values similar to these (for reference only – always consult the manufacturer’s original document): a motor driver
| Parameter | Symbol | Min | Typ | Max | Unit | |-----------|--------|-----|-----|-----|------| | Supply voltage (after startup) | V_CC | 8.5 | 12 | 25 | V | | Startup current | I_start | - | 30 | 50 | µA | | Operating current (no load) | I_CC | - | 2.5 | 4 | mA | | Oscillator frequency | F_osc | 60 | 65 | 70 | kHz | | Maximum duty cycle | D_max | 70 | 72 | 75 | % | | Feedback reference | V_FB | 2.45 | 2.5 | 2.55 | V | | Current sense threshold | V_CS | 0.85 | 0.9 | 0.95 | V | | Internal MOSFET R_DS(on) | - | - | 4.5 | 5.5 | Ω | | Drain-source voltage rating | V_DSS | 700 | - | 800 | V |
Why this matters: Precise V_CS and V_FB values affect transformer design and output regulation. A low-quality datasheet omits tolerances, forcing engineers to overdesign.
In the world of power electronics, precision is paramount. Whether you are designing a switching power supply, a motor driver, or an industrial control system, the components you choose define the reliability of your final product. Among the myriad of voltage regulators and controllers on the market, the SN51DP stands out as a robust, versatile integrated circuit. However, a component is only as good as the documentation behind it. This article dives deep into why accessing a sn51dp datasheet high quality version is the first critical step toward a successful design, and what you need to know once you have it.
Let’s reconstruct a typical pinout based on recognized SN51DP variants (Sanken, ST, or generic equivalents). Most SN51DP devices follow an 8-pin DIP arrangement:
| Pin | Name | Description | |-----|------|-------------| | 1 | VCC | Power supply input (usually 8V to 25V) | | 2 | GND | Ground reference | | 3 | FB | Feedback input (connects to optocoupler or voltage divider) | | 4 | CS | Current sense input (monitors MOSFET source current via resistor) | | 5 | NC | No connect or internal test point | | 6 | DRAIN | Internal high-voltage MOSFET drain | | 7 | NC | No connect | | 8 | VSTR | High-voltage start-up (connected to bulk DC link voltage) |
Critical insight: Pin 8 (VSTR) allows the IC to power itself from the rectified mains until the auxiliary winding takes over after startup. This eliminates the need for an external depletion MOSFET.