Sn51dp Datasheet Jun 2026

A primary point of failure in LED driver circuits isn't the controller itself, but open-circuit failure in the display's internal LED strips. When an LED burns out and opens the circuit, the voltage on the driver board spikes rapidly. The detects this surge and instantly latches the IC into protection mode to prevent component destruction. How to Disable Protection for Diagnostics

Often found in a 16-pin configuration for integrated circuit (IC) setups .

The SN51DP operates as a pulse-width modulation (PWM) controller engineered to drive external MOSFET configurations in boost converter layouts. This architecture provides stable current to LED strings despite fluctuating voltage inputs. Specification Value On-Bright Electronics Co Ltd Package Encapsulation SSOP-10 / MSOP-10 Pin Count Primary Application LED Backlight TV Driver & LCD Power Management Dimming Control PWM and Analog Support Max Operating Temp Compliance Lead-Free / RoHS Compliant Detailed Pinout Configurations

Not suitable for phase-control dimming (e.g., light dimmers) because zero-crossing forces full-cycle switching. sn51dp datasheet

Feedback Input. Samples the output current loop from the LED cathode to automatically adjust the PWM duty cycle.

The SN51DP is part of a family of operational amplifiers designed to offer a good balance between performance and power consumption. It features:

Current Sense input. Continuously monitors the peak current through the external switching MOSFET for cycle-by-cycle protection. GND A primary point of failure in LED driver

: 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.

Always verify Pin 5 reference voltage and Pin 9 divider network before replacing the IC.

For those comfortable with more advanced troubleshooting, here are specific measurement points and expected values: How to Disable Protection for Diagnostics Often found

Main power supply input pin (typically references 12V rails). GATE

: Features high-speed pulse width resolution, programmable up to Integrated Power Management : Includes an on-chip 3.3V regulator , simplifying your power rail requirements. Robustness : All I/O pins and internal connections feature ESD protection to ensure longevity in industrial environments. Compact Footprint : Typically available in an package, making it suitable for space-constrained designs. Compliance : The component is RoHS Compliant and lead-free. Common Applications