Sn51dp - Datasheet

The SN51DP datasheet provides comprehensive information to help engineers and designers select the right operational amplifier for their projects, ensuring optimal performance and reliability.

is a standalone digital pulse width modulator (DPWM) and power management integrated circuit (IC) primarily used as an LED backlight driver

in liquid crystal display (LCD) applications, such as TVs and monitors. It is manufactured by

and is often found on mainboards like the TP.S506.PB801 used in brands such as Arielli, Crown, and Hisense. NETASHOP.GR Technical Specifications Manufacturer Package Type MSOP-10 or SSOP-10 Supply Voltage ( cap V sub cap I cap N end-sub 3.5V to 7V Operating Temperature -20°C to 130°C Resolution Up to 8-bit programmable pulse width Dimensions 3.9mm (L) x 7.9mm (W) x 1.7mm (H) Key Features Integrated Power Management:

Features an on-chip 3.3V regulator and integrated power/ground planes for stable operation. Precision Control: High-speed pulse width resolution with low jitter. Protection Circuitry: I/O pins and internal connections are ESD protected. Equivalents/Analogs: Can often be replaced by the (though the OB3350CP typically uses a SOP-8 package). Pin Configuration (Typical 10-Pin)

Based on application schematics, the pinout typically includes: cap V sub cap I cap N end-sub (Supply Voltage) DIM (Dimming Control) GATE (Drive output for MOSFET) GND (Ground) ISET (Current setting) CS (Current Sense) FB (Feedback) sn51dp datasheet

OVP (Over Voltage Protection) — Protection can sometimes be bypassed for testing by connecting a 10K resistor from this pin to GND. Common Applications LED TV/Monitor Repair:

Used extensively in the backlight driver circuits of LCD panels. DC Motor Speed Control:

Utilizing its DPWM capabilities for precise speed management. General PWM Systems:

Suitable for any system requiring programmable LED lighting control. or a list of for this specific IC? The IC Sn51dp schematic , ic inverter by-passing protection

The SN51DP is a power management IC primarily used as an LED backlight driver for liquid crystal display (LCD) televisions. Manufactured by On-Bright Electronics, it is commonly found in TV repair contexts, often replaced by or cross-referenced with the OB3350 CP driver IC. Key Technical Specifications Based on manufacturer data and technical listings features the following: Package Type: MSOP-10 (10-pin Surface Mount). Operating Voltage: Minimum 3.5V to Maximum 7V. Temperature Range: Operating from -20°C to 130°C. Caution : Many "SN51DP" listings online are counterfeit

Main Function: Standalone digital pulse width modulator (DPWM) for precision LED lighting and DC motor control. Pinout and Schematic Details

The IC typically utilizes a 10-pin configuration to manage power and feedback for LED backlights: Pin 1 (VIN): Input voltage. Pin 2 (GATE): Output to drive the external MOSFET. Pin 3 (GND): Ground connection.

Pin 4 (CS): Current sense for protecting and regulating output. Pin 8 (OVP): Over-voltage protection. Pin 10 (DIM): Dimming control input. Common Applications and Issues

Technicians often encounter this chip when troubleshooting LED TV backlight failures where the display remains dark but sound is present.

Troubleshooting: If the output voltage to the LEDs is too low (e.g., ~25V for a 32-inch screen), the IC may be defective. A: Yes, due to its BJT design, efficiency is lower (70-80%)

Replacement: It is often sold in multi-packs on sites like AliExpress for industrial and home electronics repair.

Reliability: Operating near its maximum junction temperature (125°C) in sealed enclosures can significantly reduce its lifespan. LED driver IC replacement.

A: According to internal block diagrams from older datasheets, the SN51DP uses a bipolar junction transistor (BJT) as the power switch, not a MOSFET. This explains its higher saturation voltage (0.8V typical) compared to modern MOSFET-based converters.

Given that Sanken has discontinued many of these older hybrid ICs, official PDFs are not always on their main site. Try these sources:

Caution: Many "SN51DP" listings online are counterfeit clones. If the price is too low (e.g., <$2), be suspicious. Authentic Sanken parts are heavy, have precise pin straightness, and include a matte finish.

A: Yes, due to its BJT design, efficiency is lower (70-80%). A heat sink is mandatory above 500mA. Consider a modern alternative (e.g., LM2596) for new designs.

Sn51dp - Datasheet

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The SN51DP datasheet provides comprehensive information to help engineers and designers select the right operational amplifier for their projects, ensuring optimal performance and reliability.

is a standalone digital pulse width modulator (DPWM) and power management integrated circuit (IC) primarily used as an LED backlight driver

in liquid crystal display (LCD) applications, such as TVs and monitors. It is manufactured by

and is often found on mainboards like the TP.S506.PB801 used in brands such as Arielli, Crown, and Hisense. NETASHOP.GR Technical Specifications Manufacturer Package Type MSOP-10 or SSOP-10 Supply Voltage ( cap V sub cap I cap N end-sub 3.5V to 7V Operating Temperature -20°C to 130°C Resolution Up to 8-bit programmable pulse width Dimensions 3.9mm (L) x 7.9mm (W) x 1.7mm (H) Key Features Integrated Power Management:

Features an on-chip 3.3V regulator and integrated power/ground planes for stable operation. Precision Control: High-speed pulse width resolution with low jitter. Protection Circuitry: I/O pins and internal connections are ESD protected. Equivalents/Analogs: Can often be replaced by the (though the OB3350CP typically uses a SOP-8 package). Pin Configuration (Typical 10-Pin)

Based on application schematics, the pinout typically includes: cap V sub cap I cap N end-sub (Supply Voltage) DIM (Dimming Control) GATE (Drive output for MOSFET) GND (Ground) ISET (Current setting) CS (Current Sense) FB (Feedback)

OVP (Over Voltage Protection) — Protection can sometimes be bypassed for testing by connecting a 10K resistor from this pin to GND. Common Applications LED TV/Monitor Repair:

Used extensively in the backlight driver circuits of LCD panels. DC Motor Speed Control:

Utilizing its DPWM capabilities for precise speed management. General PWM Systems:

Suitable for any system requiring programmable LED lighting control. or a list of for this specific IC? The IC Sn51dp schematic , ic inverter by-passing protection

The SN51DP is a power management IC primarily used as an LED backlight driver for liquid crystal display (LCD) televisions. Manufactured by On-Bright Electronics, it is commonly found in TV repair contexts, often replaced by or cross-referenced with the OB3350 CP driver IC. Key Technical Specifications Based on manufacturer data and technical listings features the following: Package Type: MSOP-10 (10-pin Surface Mount). Operating Voltage: Minimum 3.5V to Maximum 7V. Temperature Range: Operating from -20°C to 130°C.

Main Function: Standalone digital pulse width modulator (DPWM) for precision LED lighting and DC motor control. Pinout and Schematic Details

The IC typically utilizes a 10-pin configuration to manage power and feedback for LED backlights: Pin 1 (VIN): Input voltage. Pin 2 (GATE): Output to drive the external MOSFET. Pin 3 (GND): Ground connection.

Pin 4 (CS): Current sense for protecting and regulating output. Pin 8 (OVP): Over-voltage protection. Pin 10 (DIM): Dimming control input. Common Applications and Issues

Technicians often encounter this chip when troubleshooting LED TV backlight failures where the display remains dark but sound is present.

Troubleshooting: If the output voltage to the LEDs is too low (e.g., ~25V for a 32-inch screen), the IC may be defective.

Replacement: It is often sold in multi-packs on sites like AliExpress for industrial and home electronics repair.

Reliability: Operating near its maximum junction temperature (125°C) in sealed enclosures can significantly reduce its lifespan. LED driver IC replacement.

A: According to internal block diagrams from older datasheets, the SN51DP uses a bipolar junction transistor (BJT) as the power switch, not a MOSFET. This explains its higher saturation voltage (0.8V typical) compared to modern MOSFET-based converters.

Given that Sanken has discontinued many of these older hybrid ICs, official PDFs are not always on their main site. Try these sources:

Caution: Many "SN51DP" listings online are counterfeit clones. If the price is too low (e.g., <$2), be suspicious. Authentic Sanken parts are heavy, have precise pin straightness, and include a matte finish.

A: Yes, due to its BJT design, efficiency is lower (70-80%). A heat sink is mandatory above 500mA. Consider a modern alternative (e.g., LM2596) for new designs.

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