IR35210MTRPBF

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IR35210MTRPBF: Application Field and Working Principle

The integrated circuit (IC) IR35210MTRPBF from International Rectifier is a synchronous buck controller focused on performing as an ideal current-mode controller for conversion of an input of voltages from four volts up to 28 volts, to an output that can regulate at voltages from 0.5 volts up to 13.5 volts and up to a 30 amps. This IC is categorized in the type of Power Management ICs known as Specialized.

Features and Benefits of the IC IR35210MTRPBF:

• The IC IR35210MTRPBF has a wide temperature range operation, from -40°C to +125°C.
• It has a typical 5V startup, allowing higher input voltage operation if desired.
• This part has a clock frequency of 100kHz up to 500kHz, allowing for flexible frequency selectable.
• It has several protection features like Cycle-By-Cycle Current Limit, Ultra-fast UVLO, Over Voltage Protection, and Integrated Over Temperature.
• This device includes a phase-lockable clock with spread spectrum and frequency synchronization.
• The external compensation capability maximizes loop stability.

Application Fields and Uses of the IC IR35210MTRPBF:

The IC IR35210MTRPBF has multiple application fields and uses. This part is focused on solve Power Management issues in several kinds of systems, such as medical, industrial, automotive, computing, lighting, telecommunications and instrumentation applications, this being the most prominent ones. In these fields, it is used as part of the power supply systems.

More concretely, this integrated circuit is used as current mode controller in several applications. It can be used to provide isolated power, for example, for a step-down transformer of a 12V input, or can provide power for an isolated RS-485 network. Moreover, it also be used in automotive systems, as current mode controller for a battery charger with a wide input voltage range.

Operating and Working Principles of the IC IR35210MTRPBF:

The IC IR35210MTRPBF is an integrated circuit designed to control and interface with the power conversion system, based on a voltage source converter (VSC) topology. This device works by converting a voltage source to a current source. The converter operates using the basic converter’s principles. Once an input voltage is present at the VSC, the voltage is regulated to the desired output voltage through a feedback control loop. The process is realized by the regulation of the switching element, such as a MOSFET or IGBT, which also depends on the reference of the voltage source controller. A Pulse Width Modulator (PWM) is then at the heart of the power control feedback loop.

This IC is also fed with its control signal output from the Current Sense Amplifier. This amplifier measures the power converter current through means of the sense resistor. As the voltage across the sense resistor is proportional to the converter current, the signal is then processed and sent to the ISEN pin where is being fed back to the voltage source converter. The result will be an output signal that is accurately correlated with the current. This feedback loop then controls the MOSFETs switching frequency, also a result of the reference clock frequency of 100kHz up to 500kHz, in order to maintain the accuracy of the output voltage at the current power level.

Conclusion:

The integrated circuit IR35210MTRPBF from International Rectifier is a synchronous buck controller with a wide range of application fields and uses. It is categorized as an IC focused on Power Management, of the type Specialized. The IC IR35210MTRPBF is able to provide current mode control to a voltage source converter topology, resulting in used as an ideal device to perform conversions of input voltages from a wide range up to a 30 amps output with an accuracy of the output voltage at the desired current power level.

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