MAX1897ETP+T

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MAX1897ETP+T application field and working principle

MAX1897ETP+T is a DC DC switching controller that provides enhanced control and protection for DC power. It helps ensure safe, reliable operation of non-isolated DC DC converters and is particularly suitable for space-constrained applications such as in servers, base stations, and automotive applications. This article will outline the application fields and working principles of MAX1897ETP+T.

The MAX1897ETP+T is targeted for a wide range of applications, including:

• Distributed Power System – Utilized in server and telecom applications, these controllers support distributed power architectures such as +1.2V, +1.8V, +2.5V, +3.3V, +12V in a highly regulated and efficient manner.
• Automotive – MAX1897ETP+T DC–DC controllers are designed to support a wide range of vehicles, from compact cars to luxury sedans, providing reliable and efficient power management.
• Green Energy – This device supports distributed power architectures with the added capability of power savings. During light-load conditions, the output voltage will be automatically adjusted according to the need, resulting in a reduction of power consumption.

The MAX1897ETP+T is a pulse-width-modulation (PWM) DC–DC switching controller with integrated protection and control circuitry. It has a wide adjustment range of 0.8V to 4.2V on the output voltage and it offers tight operational voltage accuracy and stability. This helps to ensure the precision of non-isolated voltage regulators, thus improving system performance. The device further supports pulse frequency modulation for possible power savings and supports both fixed frequency and frequency modulation operation.

The MAX1897ETP+T contains all the control and protection functions required for safe, reliable operation of a DC–DC converter, including:

• Under voltage lockout (UVLO)
• Over voltage protection (OVP)
• Over temperature protection (OTP)
• Soft start

The MAX1897ETP+T has automatic voltage positioning (AVP) and peak inductor current mode control (PIMC). The AVP feature helps to limit variation of the output voltage due to load transients. PIMC utilizes an inductor current ramp and voltage feedback loop to reduce dynamic load regulation errors and optimize the overall efficiency.

The MAX1897ETP+T offers an adjustable switching frequency of up to 500kHz, allowing the flexibility of powering a variety of load conditions. The input voltage can range from 7V to 30V and the output voltage can be set from 0.8V to 4.2V. It contents integrated over temperature protection (OTP) and short circuit protection (SCP) circuits. It also includes external loop compensation, device enable and power good functions, as well as output disable.

In conclusion, the MAX1897ETP+T is a versatile DC–DC switching controller with comprehensive control and protection features. This makes it ideal for distributed power system, automotive, and green energy applications. It provides an adjustable output voltage, tight control and voltage accuracy, over temperature and short-circuit protection, as well as pulse frequency modulation for possible power savings.

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