Offers high-speed pulse width resolution with low jitter operation.
: A high-quality datasheet provides detailed electrical characteristics, including but not limited to input and output impedance, propagation delay, and jitter.
Switched node connection and return path for high-side driver. Low-side N-channel MOSFET gate drive output. 10 Power ground connection for the synchronous rectifier. 11 Feedback input connected to the output voltage divider. 12 Error amplifier compensation node for loop stability. 13 Soft-start programming pin via an external capacitor. 14 Current limit threshold programming input. 15-20 Internal ground connections and thermal pad links. Core Features and Built-in Protections 1. D-CAP™ Control Mode
| 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
Latches off the controller if VOUTcap V sub cap O cap U cap T end-sub exceeds 120% of the set target. Under-Voltage Protection (UVP): Shuts down the device if VOUTcap V sub cap O cap U cap T end-sub drops below 70% of the target for a sustained period. Over-Current Protection (OCP): Utilizes the low-side MOSFET
Understanding the core operating conditions of the SN51DP ensures reliable system engineering and avoids premature component failure. Below is a summary of the technical parameters sourced from standard component data:
With counterfeit or incomplete datasheets circulating online, how can you ensure you’re getting a ? Offers high-speed pulse width resolution with low jitter
: Frequency Program Pin. Allows manual setting of the internal clock via a resistor to ground (on adjustable variants).
In a standard step-down configuration (e.g., converting a 19V laptop adapter input down to a 1.05V system rail), the SN51DP requires only a few external components:
: LED TV Driver (commonly integrated into control boards like the TP.S506.PB801 and brands such as Arielli, Crown, and Felix). Low-side N-channel MOSFET gate drive output
If you are encountering issues with this component, you can explore the technical discussion on Jestine Yong's blog for troubleshooting steps.
: Temporarily bypassing the protection can help isolate the fault. To do this, you can solder a 10k ohm resistor from Pin 9 (OVP) to ground (GND) . This is for short-term testing only , as it prevents the IC from shutting down in an over-voltage event, which could damage other components.