L7808CD2T-TR Datasheet/PDFL7808CD2T-TR is a popular voltage regulator that offers adjustable and fixed output voltage options and is ideal for applications such as providing a stable voltage supply for portable electronics and other applications that require a constant voltage. This article will discuss the application fields and working principle of L7808CD2T-TR.
Application Fields
The L7808CD2T-TR is a linear voltage regulator that can provide both adjustable (1.2 V to 33 V) and fixed (5 V, 12 V, and 15 V) output voltages. The adjustable output voltage can be adjusted by a voltage divider and a feedback loop circuit inside the regulator. The voltage divider and feedback loop circuit also help to protect the output from overvoltage and undervoltage conditions. The large current capability of this regulator makes it suitable for many different applications.
One of the most popular applications of the L7808CD2T-TR is in providing a stable voltage supply for portable electronic devices such as mobile phones, tablets, and other handheld devices. Because these devices require a consistent voltage to function properly and efficiently, the L7808CD2T-TR can help to ensure that the devices remain powered and running at optimal levels. Furthermore, the adjustable output voltage feature of the regulator also makes it suitable for applications that require unique battery management systems. For example, the regulator can be used to charge and discharge batteries in order to maintain the optimum battery life.
The L7808CD2T-TR can also be used in automotive applications where it can be used to provide a reliable power supply to the electrical system. The adjustable output voltage feature makes the regulator suitable for applications such as providing a stable voltage supply for the audio system, deploying engine cooling fans, and charging the vehicle’s battery.
The regulator can also be used for industrial applications such as providing a constant voltage for factory machinery and other industrial equipment. The adjustable output voltage feature of the regulator makes it suitable for applications where precise voltage control is required. Additionally, the high current capability of the regulator makes it suitable for applications that require high power consumption.
Working Principle
The L7808CD2T-TR is a step-down (or buck) type linear voltage regulator that operates by comparing the output voltage with a reference voltage and adjusting its internal transistor to increase or decrease the current being supplied to the output. The output voltage is set by the voltage divider and feedback loop circuit mentioned earlier. This feedback loop works by using the output voltage as an input to the sense/feedback block and comparing it to the reference voltage. If the output voltage is too low, the feedback loop will signal a voltage boost and the current in the linear regulator will be increased. Conversely, if the output voltage is too high, the feedback loop will signal a voltage drop and the current will be decreased.
The linear regulator also includes a thermal protection feature that operates by sensing the device\'s temperature and comparing it with the safe operating temperature range. If the device temperature exceeds the safe operating range, the thermal protection circuit will signal the linear regulator to reduce the current supplied to the output. This helps to avoid potential damage to the device.
In summary, the L7808CD2T-TR is a popular linear voltage regulator that is used in a variety of applications due to its adjustable and fixed output voltage options, high current capability, and thermal protection feature. The regulator operates by comparing the output voltage with a reference voltage and adjusting the current being supplied to the output accordingly. By providing a stable voltage supply for various electronic devices and applications, the L7808CD2T-TR is a highly versatile and efficient power solution.