LM2853MH-1.5

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The LM2853MH-1.5 is a transformable non-synchronous DC DC switching regulator, designed and developed by the Texas Instruments Corporation. It is designed to have superior efficiency, power and long lifetime capability. Its big 1cm2 packaging and easy to install features make it ideal for space and power constrained applications, such as portable electronics, low power energy systems, telecommunication, white goods appliances and industrial control applications.

The LM2853MH-1.5 switching regulator can be used as a step-up, step-down, or inverting converter. Its wide input voltage range and synchronous switching frequency between 100 kHz and 600 kHz make it very suitable for a range of power control applications. Its circuitry also allows it to accurately adjust its output voltage and current, while providing good thermal protection.

Working Principle

The LM2853MH-1.5 uses pulse width modulation (PWM) to achieve efficient DC-to-DC conversion. In the PWM switching mode, the PWM controller provides the appropriate duty cycles of the switching devices in order to produce an output voltage that is proportional to the input voltage. The duty cycle is an important factor when regulating the step-up, step-down, or inverting converter. The pulse width of the output is directly proportional to the input voltage, so when the input voltage rises, the pulse width will rise accordingly.

The pulse width modulation is coupled with control loops to balance the load with the power supply. Both power devices are used to drive the PWM control loop, where the PWM circuit\'s output will maintain the voltage stability during fast changes in load and input. The PWM controller turns on the power device, inducing current to flow through the inductor, converting it into high voltage. Then, the other power device is turned off, resulting in the voltage being clamped at a certain level. This “regenerative action” allows the self-regulation of the output voltage.

Application Field

The LM2853MH-1.5 DC DC switching regulator is a highly efficient module designed to simplify the design of electronic devices. It can be used in a variety of applications, such as light transportation, power backup systems, power sources for base stations, white goods appliances, industrial control equipment, computer peripherals, and solar powered systems. It is ideal for space-limited applications because of its compact size. The LM2853MH-1.5 is capable of providing a wide input voltage range, fast switching frequency, low ripple, and accurate control of the output voltage.

The LM2853MH-1.5 switching regulator also has robust protection features, including over current and under voltage protection. It has a soft start-up feature to reduce the inrush current, giving the device excellent overload and short-circuit protection. Its safe output short-circuit protection and built-in thermal protection make it perfect for demanding applications. The LM2853MH-1.5 is also easy to install and its high levels of power saving make it suitable for battery-powered applications. It is a cost-effective, high-efficiency module that offers all the features needed to build a reliable power system.

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