IR6226

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IR6226 is a multi-channel, high-side power MOSFET driver. It is used in various power distribution switching and load driving applications. Being able to control eight MOSFETs and having an integrated lowside current sense amplifier, it optimally communicates with the host controller, allowing for a very fast and efficiency transfer of power. By incorporating an intelligent shutdown feature, it can save power in the system during transitions from on to off states.

The primary application fields for the IR6226 are industrial, automotive, compute and communications applications. It can be used to control a large variety of loads that require high-current switching and load driving operations. The IR6226 can also be used for a variety of other applications, like motor control applications and HVAC systems.

The IR6226’s working principle consists of two main stages, a control and high side stage, and a low side stage. The control stage is based on a digital-controlled delay generator circuit, where the delay is set by a logic write command. This delay determines the rise and fall time of all high side power MOSFETs, allowing the system to adjust to change in resistance and capacitance, which is especially important for HVAC applications where the external load inductance may reduce the system’s overall power delivery efficiency.

The low side stage consists of two functions. The first is the low side current sense amplifier, which is used to measure and monitor the current load level on all eight channels. The second is the low side gate driver, which enables the user to control the output current to the external load. This feature is especially useful for motor protection, where the user can set a current limit on the motor’s output and therefore provide autonomous over-current protection.

The IR6226 is a flexible and highly efficient power management and distribution switch, suitable for a variety of industrial, automotive, and communication systems. Its combination of both high side and low side control and monitoring circuitry and its integrative low side current sense amplifier makes it a great choice for applications where accuracy and efficiency is key. In addition, its digital-controlled delay generator can be used to accurately set and monitor the rise and fall times of the high side MOSFETs, ensuring optimal performance in a wide variety of applications.

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