LP3669 power supply Switching IC SOP-7

LP3669 Power Supply Switching IC in an SOP-7 package is a highly integrated, high-performance power conversion solution. This versatile IC simplifies the design of non-isolated buck-boost or flyback converters, making it a perfect choice for cost-sensitive LED lighting applications. By integrating a high-voltage power MOSFET and advanced control logic, the LP3669 reduces the need for external components, giving designers a compact and efficient solution for constant-current power supplies. Engineers and manufacturers rely on this IC to create reliable and streamlined power circuits for a wide range of products.

Key Features:

• Integrated Power MOSFET: A built-in high-voltage MOSFET streamlines the circuit design and saves valuable board space.
• Constant Current (CC) Mode: Precisely regulates output current, making it ideal for driving LEDs with consistent brightness.
• High Efficiency: Achieves high power conversion efficiency, minimizing heat dissipation and improving system reliability.
• Low Component Count: Requires minimal external components, which reduces both the bill of materials and the complexity of the PCB layout.
• Comprehensive Protection: Integrates robust protection features, including over-temperature protection (OTP), over-current protection (OCP), and VCC under-voltage lockout (UVLO).
• Primary-Side Regulation (PSR): Eliminates the need for an opto-coupler and secondary feedback circuitry, further reducing cost and complexity.

Technical Specifications:

• Input Voltage Range: 85 V to 265 V AC
• Output Current: Up to 1.5 A (application dependent)
• Switching Frequency: Internally set to optimize performance and efficiency.
• Control Mode: Constant Current (CC) control
• Standby Power Consumption: Extremely low, suitable for energy-efficient designs.
• Operating Temperature: -40 °C to +125 °C (Junction Temperature)

Mechanical Specifications:

• Package Type: SOP-7 (Small Outline Package with 7 pins)
• Pin Count: 7
• Assembly: Designed for surface-mount soldering to a PCB.
• Material: Plastic with lead frame.

Dimensions:

• Body Length: ~4.9 mm
• Body Width: ~3.9 mm
• Pin Pitch: ~1.27 mm

Pinout and Wiring:

• PIN 1: VIN
• PIN 2: GND
• PIN 3: VCC
• PIN 4: OUT
• PIN 5: CS (Current Sense)
• PIN 6: FB (Feedback)
• PIN 7: NC (No Connection)
• Wiring Note: Connect VIN to the rectified AC input, GND to the common ground, and the OUT pin to the primary winding of the transformer. Use an appropriate resistor on the CS pin to set the output current.

Datasheet Reference:

• Download the official LP3669 datasheet for comprehensive electrical characteristics, detailed pin descriptions, and example application circuits.

Applications:

• LED Lighting: Drive constant current LED bulbs, spotlights, and arrays.
• Small Power Adapters: Design efficient power supplies for various electronic devices.
• Chargers: Develop cost-effective chargers for mobile phones and other low-power gadgets.
• Appliances: Power control boards and status indicators in household appliances.

Equivalent Models:

• PT4115: A widely used constant-current LED driver IC.
• BP2832A: A similar high-voltage linear LED driver IC from Bright Power Semiconductor.
• XL7005A: A DC-DC converter IC with similar application in power supplies.

Package Includes:

• 1 x LP3669 power supply Switching IC SOP-7