MAX767EAP+T

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The MAX767EAP+T, which stands for Maxim Integrated Plus Temperature, is a precision rail-to-rail input/output DC/DC switching controller. This device offers low-cost, low-power solutions for a wide range of applications. It has a wide input voltage range and can be used to control up to four independently-controlled power supplies simultaneously.

• Application

The MAX767EAP+T is primarily used in automotive, industrial, communications, and consumer applications. Some of the most popular applications include Automotive Thermal Management Systems (TMS), Computers, Test & Measurement Equipment, DC Motor Control, Portable Electronic Devices, Automotive Display and Lighting Systems, VoIP Gateways, and Point Of Sale (POS) Equipment.

The device is also integrated in many industrial, medical, and communication markets, primarily as a power supply controller. It is primarily used to control fan speed, adjust load current, and regulate power in these applications.

• Working Principle

The MAX767EAP+T uses an accurate, high speed, rail-to-rail pulse-width modulation (PWM) control technique. This technique allows it to control power supplies without an additional buffer or amplifier. The device has adjustable ramp and slew rate limiting, minimum/maximum switch frequency and burst mode enable control, enabling it to provide highly accurate regulation.

The device also offers tight voltage regulation with a valid reference voltage, while its low cycle-by-cycle current limit eliminates the need for external current sensing, and its low-resistance switch node eliminates the need for large filter capacitors. The device also includes comprehensive diagnostic and protection features, ensuring robust operation.

In addition, the device has a unique windup timer that helps maintain power supply stability. This timer provides a pulse-width modulated output wake-up at startup, providing optimal load current performance and preventing overshoot during the power-on process.

The MAX767EAP+T also features a cycle-by-cycle in-rush current limiting circuit which limits the in-rush current during start-up, thus enabling the use of smaller power supplies and reducing the effect of the load on the power supply.

The device also offers adjustable on-time, allowing the user to adjust the PWM frequency to match the power supply requirements.

Overall, the MAX767EAP+T is an accurate and efficient switching controller for a wide range of applications. It offers a low-cost solution for controlling power supplies, and its low cycle-by-cycle current limit, low-resistance switch node, and adjustable on-time feature make it easy to use and extremely efficient.

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