The model number "LNK364PN" refers to an integrated circuit (IC) produced by LinkSwitch (a series of ICs from Power Integrations). These ICs are typically used for switch-mode power supply (SMPS) applications, specifically for low-power isolated and non-isolated AC-DC applications.
Packaging of the LNK364PN:
The LNK364PN IC is available in a DIP-8 (Dual In-line Package) form, which means it has 8 pins in total. In terms of its function, this package is commonly used for low-power applications where cost-effectiveness and ease of handling are important.
Here is a detailed explanation of the pin functions and a table format listing all the 8 pins.
Pin Functionality Overview (8-pin package):
The following is a detailed pinout table for the LNK364PN, showing the function of each pin:
Pin Number Pin Name Pin Function Description Pin 1 Drain Drain of the internal MOSFET. Connect to the primary side of the transformer. This is the switching node, which handles the high-voltage AC to DC conversion. Pin 2 Source Source of the internal MOSFET. Connect to the ground or common side of the power supply. This pin is critical for the operation of the MOSFET within the circuit. Pin 3 Vdd Vdd pin (Voltage Drain) powers the internal circuitry. A capacitor is usually placed here to filter the supply and stabilize voltage. Pin 4 Feedback Feedback pin. Used for voltage regulation via an external optocoupler, which communicates feedback to regulate the output voltage. Pin 5 GND Ground. This pin is used for the negative terminal of the power supply and provides a reference for the operation of the IC. Pin 6 Vdd Vdd pin. This pin powers the internal circuitry of the IC and is used to stabilize the voltage in a feedback system. Pin 7 Drain This is the second drain pin for the internal MOSFET. It must be connected to the primary side of the transformer. Pin 8 Source Another Source pin. Similar to Pin 2, this is used to connect to the ground of the system.Common FAQ (Frequently Asked Questions) Related to the LNK364PN:
Here is a set of 20 FAQs based on the LNK364PN model, providing answers about the pin functions, general use, and troubleshooting tips.
What is the LNK364PN? The LNK364PN is a power switch IC manufactured by Power Integrations for low-power SMPS applications, such as AC-DC converters.
How many pins does the LNK364PN have? The LNK364PN comes in an 8-pin DIP package.
What does the Drain pin (Pin 1) do in the LNK364PN? Pin 1 (Drain) is the drain of the internal MOSFET and should be connected to the primary side of the transformer for power conversion.
What should be connected to the Source pin (Pin 2) in the LNK364PN? Pin 2 (Source) should be connected to the ground or the common side of the power supply.
What is the purpose of the Feedback pin (Pin 4) on the LNK364PN? The Feedback pin (Pin 4) receives feedback from an optocoupler to regulate the output voltage of the power supply.
How does the Vdd pin function in the LNK364PN? Vdd pins (Pin 3 and Pin 6) power the internal circuitry of the IC and help in stabilizing the voltage for efficient operation.
What is the role of Pin 5 (GND) on the LNK364PN? Pin 5 (GND) is used for the ground connection, providing the reference for the internal circuitry and the IC.
Can I use the LNK364PN for high-power applications? No, the LNK364PN is designed for low-power AC-DC conversion, typically handling up to 34 watts of output power.
Is there any need for external components for feedback regulation? Yes, an external optocoupler and a feedback resistor network are typically needed for proper voltage regulation.
Can I use the LNK364PN without a transformer? No, the LNK364PN requires a transformer for its primary-side switching operation to isolate and step down the voltage.
What is the maximum voltage the LNK364PN can handle? The LNK364PN can handle input voltages up to 265V AC.
How do I handle thermal dissipation with the LNK364PN? Proper heat sinking is important for the LNK364PN. Ensure sufficient PCB area for heat dissipation, as it is sensitive to overheating.
What type of output voltage can I expect from the LNK364PN? The output voltage will depend on the feedback loop and the transformer used. Typically, it is used in low-voltage DC supplies, such as 5V or 12V output.
Can the LNK364PN operate at high switching frequencies? Yes, the LNK364PN supports switching frequencies up to 100 kHz for efficient power conversion.
What is the maximum output current for the LNK364PN? The maximum output current typically depends on the application, but the IC is rated for currents up to 150mA at its output.
How should I filter the Vdd pin? Use a decoupling capacitor close to the Vdd pin to stabilize the supply voltage and ensure proper internal operation.
What is the pinout configuration for the LNK364PN in the 8-pin DIP package? The LNK364PN has the following pin configuration: Pin 1 (Drain), Pin 2 (Source), Pin 3 (Vdd), Pin 4 (Feedback), Pin 5 (GND), Pin 6 (Vdd), Pin 7 (Drain), Pin 8 (Source).
Does the LNK364PN have internal protection features? Yes, the LNK364PN includes internal protections such as overvoltage and overcurrent protection to safeguard the IC and connected components.
What should I consider when designing with the LNK364PN? Ensure that the transformer is correctly chosen for your application, and consider thermal management and proper feedback loop design.
Can the LNK364PN be used for non-isolated power supply designs? Yes, the LNK364PN can be used for both isolated and non-isolated designs depending on the specific application.
This explanation and FAQ list is designed to give you a complete understanding of the LNK364PN, its pin functions, and typical usage scenarios.