LNK6663E

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The LNK6663E is an integrated power solution suitable for off-line applications which require a high level of efficiency and low external components count. It reduces power consumption, board area and bill of material costs. This device is intended for a wide variety of applications that require high efficiency, low electromagnetic interference (EMI) filter count, and precisely controlled output voltage. These applications include audio amplifiers, motor drives, white goods, PC, DC/DC and AC/DC converters.

Features:

• No opto-coupler or bias winding required
• 4-switching-mode topology
• 800V native power MOSFET rating
• 800V or 300V working voltage options
• Flexible design
• Programmable burst-mode operation
• Required external components count reduced by 36%
• Low EMI operation
• Standardized shrinking package
• Undervoltage protection (UVP)
• Selectable burst-mode operation
• Unique current fold-back protection
• Integrated logic circuitry and protection circuits

LNK6663E Application Field and Working Principle

The LNK6663E is optimized for offline applications including audio amplifiers, motor drives, white goods, PC, DC/DC and AC/DC converters, which require high efficiency and low external components count. It is an integrated power solution that can reduce power consumption, board area and bill of material costs.

The LNK6663E uses discrete components configured in a buck topology, with either an 800V working voltage or 300V. This enables it to achieve high efficiency with low EMI while reducing the cost associated with the external components. The integrated logic circuitry and protection circuits ensure system safety and reliability. Selectable burst mode operation allows the output power to be adapted to suit the exact application.

The LNK6663E features a unique current fold-back protection mechanism, allowing the system to reduce the output current automatically during an overload condition. This allows it to reduce the voltage drop when overload occurs, ensuring the circuit power is not affected by heavy load currents. The device also protects against open loop or short circuit conditions. An Under-Voltage Lockout (UVP) feature is available to protect the system for low input voltages.

The LNK6663E is a much needed alternative to traditional power solutions for applications that require high efficiency, low EMI and a low external components count. This integrated solution reduces power consumption, board area and bill of material costs while maintaining system safety and reliability.

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