Sn51dp Datasheet Pdf _top_ -

: Schematic diagrams for specific television models from brands like Hisense or Crown often include the implementation details of the SN51DP within the power or scaler board sections.

Navigating the requires a firm understanding of its 10-pin design. Each pin plays a vital role in balancing current distribution, feedback monitoring, and protection loops: Pin Number Description and Functional Utility 1 VIN

| Pin | Name / Function | Description & Typical Operation | | :--- | :--- | :--- | | | VCC (Power Supply) | The chip's main power supply input. Typically connected to a stable 12V DC rail. | | 2 | DRV (Gate Drive Output) | This is the crucial output pin. It sends a pulse-width modulation (PWM) signal to drive an external MOSFET (e.g., QB801), which switches the current through the boost converter's inductor. | | 3 | GND (Ground) | The common ground connection for the IC. | | 4 | ISEN (Overcurrent Protection) | An input for overcurrent protection (OCP). It senses the voltage across a low-value current-sensing resistor in series with the MOSFET's source to ground. If the voltage exceeds a threshold, the IC shuts down to prevent damage. | | 5 | PWM_REF (Duty Control) | Receives a reference voltage (e.g., 1.5V) that helps set the base operating point or frequency of the driver, working in conjunction with the PWM dimming signal. | | 6 | NC (No Connection) | This pin is not connected to the internal die and should be left unconnected or grounded. | | 7 | FB (Feedback Input) | Connected to a voltage divider from the high-voltage LED+ output. The IC monitors this feedback to regulate the output voltage precisely. It's also tied to the LED current setting resistors (e.g., RB837-RB840 in). | | 8 | COMP (Compensation) | Used for frequency compensation. An external RC network is often connected to this pin to ensure the stability of the control loop. | | 9 | OVP (Overvoltage Protection) | The input for overvoltage protection (OVP). It monitors the boosted LED+ voltage via a resistor divider (e.g., RB814, RB803). If the voltage exceeds a safe level, the chip stops switching. | | 10 | PWM_DIM (PWM Dimming Input) | Receives the PWM dimming signal from the TV's main processor (e.g., a 2.5V signal). The duty cycle of this signal directly controls the brightness of the backlight LEDs. | sn51dp datasheet pdf

The SN51DP is a backlight management IC. Its primary function is to convert input power to drive the high-voltage LED (Light Emitting Diode) strips that illuminate the screen. You will typically find it in a compact (Shrink Small Outline Package) or TSSOP-10 (Thin Shrink Small Outline Package) housing, which is ideal for space-constrained TV chassis designs. In many circuits, it is also labeled as SN510P , which is essentially an equivalent model.

When diagnosing issues with the SN51DP in LED backlight systems, technicians often focus on the feedback and protection pins. If the backlight fails to ignite or shuts down shortly after powering on, it may indicate that the IC has entered a protection state due to a detected fault in the LED strings or an over-voltage condition. Safe diagnostic procedures include: : Schematic diagrams for specific television models from

Standalone Pulse Width Modulation (PWM) and Analog Dimming controller. Compliance: 100% RoHS Compliant (Lead-Free Architecture). Typically connected to a stable 12V DC rail

Potential applications for the SN51DP include:

For detailed electrical characteristics, timing diagrams, and application circuits, the datasheet is the primary resource. Documentation for specialized ICs like the SN51DP can often be sourced through electronic component distributors and specialized technical databases: