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PMIC - Gate Drivers

IR2125STR application field and working principle

IR2125STR is a high power motor driver integrated circuit developed by Infineon Technologies. It has strong driving ability, fast switching speed and high frequency operation. It is an ideal choice for drive applications in industrial & commercial motor control system.

The IR2125STR is a high voltage, high-current, half-bridge power MOSFET driver that can be used in applications where a high voltage and/or high current needs to be switched on and off. It can drive two N-channel power MOSFETs in a half bridge configuration, and its output is protected by an internal current limiting and thermal shutdown circuit. The IR2125STR can be used as a high performance switch for a range of motor drive and solenoid applications, including those ranging from small, low cost motor control modules to high power motor drive systems.

The IR2125STR is designed to provide high-speed, high-current drive for half-bridge motor and solenoid applications. The driver consists of two N-channel MOSFET half-bridge drivers and each one is designed to drive one high-side and one low-side N-channel MOSFET, providing solid-state current limiting and over-temperature protection of the devices. The IR2125STR is designed to operate inline with the MOSFETs in the half-bridge circuit, enabling fast switching times, low insertion losses and minimal influence of gate-to-drain inductances.

The IR2125STR has two high-speed output drivers. The inputs have ESD protection and short-circuit protection. It has a built-in temperature sensor which allows the protective circuits to be enabled when the junction temperature reaches 130°C. Furthermore, it supports local feedback for current control. Overall, the IR2125STR is an ideal and efficient driver for half-bridge motor and solenoid applications.

In terms of working principle, driving power MOSFETs is a simple process. The MOSFET is turned on when the gate is taken to a higher voltage than the source. The MOSFET is switched off when the gate voltage is taken to a lower voltage than the source. The IR2125STR has a built-in high-side and low-side driver, allowing the MOSFETs in a half-bridge circuit to be switched on/off quickly and accurately. As the gate is driven rapidly, the two MOSFETs are reverse biased and act as a low impedance path between the source and drain. This allows the current to flow between the source and the drain when the MOSFETs are switched on.

In conclusion, the IR2125STR is a high performance MOSFET driver for motor drive and solenoid applications. It has built-in current limiting and thermal protection circuits and supports local feedback for current control. It is capable of providing high-speed, high-current drive for half-bridge motor and solenoid applications. Owing to its excellent specifications and performance, the IR2125STR is an ideal choice for industrial and commercial motor control systems.

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