LM78S40CN/NOPB

The LM78S40CN/NOPB is a voltage regulator manufactured by Texas Instruments, designed to provide a stable output voltage of 40V. It is part of the LM78 series of linear voltage regulators, which are widely used in various electronic applications for their reliability and ease of use.

Key Features:

1. Output Voltage: The LM78S40CN/NOPB delivers a fixed output voltage of 40V, making it suitable for applications that require a high voltage supply.

2. Input Voltage Range: The device can accept a wide input voltage range, typically from 42V to 60V, allowing it to be used in various power supply configurations.

3. Current Output: It can provide a maximum output current of up to 1.5A, which is sufficient for many medium-power applications.

4. Thermal Protection: The regulator includes built-in thermal overload protection, which helps prevent damage due to overheating. This feature is crucial for maintaining reliability in high-temperature environments.

5. Short-Circuit Protection: The LM78S40CN/NOPB is designed with short-circuit protection, ensuring that the device can withstand fault conditions without sustaining damage.

6. Package Type: The device is available in a TO-220 package, which is a common choice for power components due to its ability to dissipate heat effectively. The TO-220 package features three leads for easy mounting on a PCB.

7. Low Dropout Voltage: The regulator has a low dropout voltage, which means it can maintain regulation even when the input voltage is only slightly above the output voltage. This feature is particularly useful in battery-powered applications.

8. Ripple Rejection: The LM78S40CN/NOPB offers good power supply ripple rejection, ensuring that variations in the input voltage do not significantly affect the output voltage stability.

Applications:

The LM78S40CN/NOPB is suitable for a variety of applications, including:

• Power supplies for industrial equipment
• High-voltage power supply circuits
• Audio amplifiers
• Telecommunications equipment
• Any application requiring a stable 40V power source

Conclusion:

The LM78S40CN/NOPB from Texas Instruments is a robust and reliable voltage regulator that provides a fixed output of 40V with a maximum current output of 1.5A. Its thermal and short-circuit protection features, along with its low dropout voltage and good ripple rejection, make it an excellent choice for various electronic applications requiring stable high-voltage power.