MAX8752ETA+T

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MAX8752ETA+T Application Field and Working Principle

MAX8752ETA+T is a voltage regulator in the field of Power Management ICs (PMIC), which falls into the special purpose category. It is a secondary-side terminal isolated buck synchronous rectifier, which means it is made to turn AC into DC with synchronous rectification. It has two inputs, a primary side input and a synchronous drive input, and one output of up to 60V, making it good for most industrial applications.

Features

• Regulates output voltages down to 0.6V with 0.5V (±5%) accuracy.
• Auxiliary winding output voltage level (VL) auto-detection.
• Programmable undervoltage lockout (PVLO) settings.
• Programmable switching frequency.
• Wide temperature range of -40°C to 85°C.
• Overvoltage protection.
• Adjustable soft-start feature.
• Thermal shutdown and overcurrent protection.

Applications

The MAX8752ETA+T IC is applicable in a wide range of fields, such as power supply for DVD players and set-top boxes, modems, DSL systems, VoIP systems, video display systems, microprocessor and DSP systems, automotive power supplies and battery charging systems, and home appliances.

Working Principle

The MAX8752ETA+T consists of a voltage regulator IC and a driver IC (ETAG). The voltage regulator IC is responsible for regulating output voltage, maintaining accuracy and preventing damage due to overvoltage. It produces a feedback signal which is sent to the driver IC. The driver IC is responsible for driving the regulator IC switches, managing the soft-start sequence, and operating frequency. The input voltage enters the regulator IC via the primary winding, while the auxiliary winding supplies the driver IC with the output voltage level information.

The synchronous drive input supplies pulse-width modulated (PWM) signals to the driver IC to control the switching operation of the regulator IC. The driver IC senses the feedback signal and then drives the regulator IC to maintain the output voltage at its rated value. The regulator IC switches on-off to maintain the output voltage, and the PWM signals adjust the on-off ratio to maintain the output voltage.

In order to maintain the output voltage, the MAX8752ETA+T also features adjustable undervoltage lockout and overvoltage protection. The adjustable undervoltage lockout prevents the IC from attempting operation in extreme conditions, while the overvoltage protection ensures that the output voltage is limited.

The MAX8752ETA+T also feature a soft-start function which prevents inrush current during startup. In addition, it has a thermal shutdown and overcurrent limit feature which protects the IC from damage due to these conditions.

Conclusion

The MAX8752ETA+T voltage regulator is a reliable and cost-efficient device for a wide range of applications, such as DVD players and set-top boxes, modems, DSL systems, VoIP systems, video display systems, microprocessor and DSP systems, automotive power supplies and battery charging systems, and home appliances. It regulates output voltages down to 0.6V with 0.5V (±5%) accuracy, with adjustable undervoltage lockout, overvoltage protection, soft-start and thermal shutdown and overcurrent protection, making it a good choice for most industrial applications.

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