Sn51dp Datasheet | Verified

• Pins 1+ : Pin 2- → reading ~1.15V to 1.25V.
• Reverse leads → open circuit.

For loads with high L, use internal snubber plus an external 47Ω / 0.1µF across pins 3-4 to prevent dv/dt false triggering. Pins 1+ : Pin 2- → reading ~1

• Electrical values within ±specified tolerances.
• Timing parameters ≤ maximums listed.
• ESD and short-circuit tests meet datasheet ratings without functional degradation.
• Thermal rise below datasheet thermal limits.

is a niche but critical LED driver IC, most commonly found in the backlights of LED TV brands like For loads with high L, use internal snubber

Part 4: Electrical Characteristics (Typical, Verified at Ta=25°C)

1. Fake or Generic Listings: Some online marketplaces list "SN51DP" without a manufacturer logo. Verified components should carry an IR (International Rectifier) or Infineon marking.
2. Thermal Considerations: At 1A output, the junction-to-ambient thermal resistance (θJA) is approximately 120°C/W. For ambient temperatures above 40°C, derating is required.
3. Layout Sensitivity: The SW node and feedback trace must be isolated to prevent noise coupling. Verified layouts show a continuous ground plane under the IC.
4. No Obsolete Warning: As of 2026, the SN51DP is not officially discontinued by Infineon, but many distributors show end-of-life status. Verify stock and lead times.