Sn51dp Datasheet Pdf -
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:
The is a specialized power management integrated circuit (IC) primarily used as a high-brightness LED driver for LCD TV backlighting. Manufactured by ON-BRIG , it is commonly found on mainboards such as the TP.S506.PB801 used in television brands like Arielli, Crown, Felix, and Cyberlux. Key Technical Specifications sn51dp datasheet pdf
| Parameter | Min | Typ | Max | Unit | |----------------------------|-------|-------|-------|------| | Supply Voltage (Load) | 0 | 24 | 50 | V | | Output Current (per pin) | 0 | 350 | 500 | mA | | Input Voltage (Logic High) | 3.0 | 5.0 | 24 | V | | Input Voltage (Logic Low) | 0 | 0.8 | 1.0 | V | | Input Current (ON) | 0.55 | 1.0 | 1.85 | mA | | Input Current (OFF) | 0 | 0 | 50 | µA | When diagnosing issues with the SN51DP in LED
Reading the carefully reveals several nuances that can make or break your design. Manufactured by ON-BRIG , it is commonly found
| Condition | Pin 4 (OCP) | Pin 9 (OVP) | IC State | | :--- | :--- | :--- | :--- | | Normal Operation | Within range | 1.55V | Operating | | Current Fault (OCP) | Out of range | Can be Normal or Variable | Shut Down | | Voltage Fault (OVP) | Can be Normal or Variable | 0.8V (Low) or >2.0V (High) | Shut Down |
Feedback input pin; reads voltage drops from the LED cathode string to maintain constant current regulation.
Feedback control loop input linked directly to the LED cathode line. COMP
