MAX15048ETJ+T

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MAX15048ETJ+T is a set of precision, high-voltage current-sense amplifiers and reference chips, which have become very popular in the power supply control market. These chips are widely used in switch-mode power supplies, LED lighting, and industrial process control to provide precision current sensing, voltage control, and fault detection. This article will explore the application field and working principle of MAX15048ETJ+T.

The MAX15048ETJ+T is designed to be used as a post regulator supplying current to the load of switch-mode power supplies. It features a 6-bit adjustable full-scale current sense voltage range of 50mV to 424mV, and is capable of accurately regulating output current of up to 5A. It also features thermal overload protection and short-circuit protection, making it a reliable choice in various safety-critical applications.

The MAX15048ETJ+T is based on a four-terminal precision current-sense topology. This topology is made up of four resistors connected in a Wheatstone bridge. This bridge is then connected to the output of the power supply, and one of the resistors acts as the input to the amplifier. The output of the amplifier is then used to adjust the control voltage of the power supply, thus regulating the output current.

The MAX15048ETJ+T can also be used as a current comparator, enabling the detection of over-current and short-circuit faults. It features an adjustable over-current threshold voltage range of 10mV to 500mV. When the current passing through the resistors in the Wheatstone bridge exceeds this threshold, the output of the amplifier is pulled down to ground. This can be used to trigger a fault flag, which can then trigger a system shutdown.

The MAX15048ETJ+T can also be used to measure voltage levels. The chip features an on-chip parameter reference diode, which provides an output indicative of the voltage across the resistor. This parameter can be accurately measured and used to monitor the secondary output voltage of the power supply.

In addition, the MAX15048ETJ+T also features an output current-sense temperature monitor. This monitor measures the temperature of the power supply, and if the temperature exceeds the preset threshold, the output of the current-sense amplifier is turned off, thus protecting the power supply from over-heating.

The MAX15048ETJ+T is a powerful, versatile chip which is used for precision current sensing, voltage regulation, and fault detection in switch-mode power supplies. It uses a four-terminal Wheatstone bridge topology and is capable of accurately measuring and controlling output current of up to 5A. It also features thermal overload protection and short-circuit protection, making it a reliable choice in various safety-critical applications.

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