LM2696MXA Application Field and Working Principle
The LM2696MXA is a highly integrated DC-DC switching regulator in the Axiomtek Limited. It is designed to be employed in a variety of power supplies including systems based on regulated DC power supply, adjustable DC power supply and frequency converters. In addition, LM2696MXA can integrate many different types of switching regulators in a very small package, making it an excellent choice for applications with limited space.
Application Field
The LM2696MXA can be used in a wide range of applications, among them:
- Voltage Regulators
- DC-DC converter
- Low power converter
- AC to DC convertors
- LCD monitors
- TV and computer power supplies
- Battery powered systems
- Toner Fuser assemblies
- Motors and relays
Working Principle
The LM2696MXA is a simple but reliable DC-DC switching regulator that relies on circuit feedback to monitor its output voltage in order to regulate it. The regulator is based on a feedback system that adjusts the operating speed of the power switch to achieve the desired output voltage. The operating speed of the switch is determined by the controlling voltage received from the feedback circuit. When power is applied, the voltage regulator will start to operate by switching the power switch in a manner that will transfer energy from the input to the output. During the operation of the power switch, a controller will monitor the output voltage and adjust the switching frequency so that the desired voltage level is maintained. The adjustment is achieved by sampling the output voltage and comparing it with a reference level. If the output voltage is lower than the reference voltage, the controller will increase the switching frequency in order to increase the output voltage. If the output voltage is higher than the reference voltage, the controller will decrease the switching frequency in order to reduce the output voltage. The power switch used in the LM2696MXA is a field effect transistor (MOSFET). The MOSFET is controlled by a driver current, which is generated by the controller. The controller determines the required switching frequency and activates the MOSFET switch at the appropriate time. The MOSFET will then switch on the power supply and the current will be transferred from the input to the output. The LM2696MXA can also be used to generate output voltage in both the positive and negative polarities. This feature is specially useful in SEPIC, flyback, boost, buck and other DC-DC converter applications. The regulator is designed to operate up to a frequency of 1MHz and is capable of providing an output voltage of up to 20V.
Conclusion
The LM2696MXA is an efficient and cost-effective DC-DC switching regulator that offers a wide range of applications in regulated DC power supply, adjustable DC power supply, frequency converters and other power supplies. It is based on a feedback system that adjusts the operating speed of the power switch in order to regulate the output voltage. With its high operating frequency, it can be used in various power supplies, such as low power converter, LCD monitors, TV and computer power supplies and more.
LM2696MXA Datasheet/PDF