MAX77816AEWP+T

Series:	*
Packaging:	Tape & Reel (TR)
Part Status:	Active
Package / Case:	20-WFBGA
Supplier Device Package:	20-WLP (1.83x2.13)

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PMIC Voltage Regulators DC DC Switching RegulatorsThe MAX77816AEWP+T is a DC-DC switch mode power supply controller with a synchronous step down regulator designed specifically for Notebook interface power supplies. The operating voltages, power factor correction (PFC) and other key characteristics are the same as those under the traditional power supply model. The main difference is that this synchronous step-down regulator is integrated into the MAX77816AEWP+T instead of a discrete converter. It uses digital design based on dual PWM controller, providing high integration, small size, fast response and reliable protection for Notebook power supply solutions.The MAX77816AEWP+T consists of a high-voltage PFC, DC-DC converter control, and short-circuit protection. The entire system has an input voltage of 6V to 55V. It supports up to three output voltages; 2.5V to 5.5V, 10V to 5.5V, and two adjustable output voltage from 0.6V to 6V. It has overload, over-temperature, under-voltage and over-voltage protection functions.The main working principle of the MAX77816AEWP+T is a synchronous switch mode DC-DC converter with a pulse-width modulation (PWM) control circuit. It has an input side with a step-down switching regulator on the output side. The PFC portion provides AC-DC conversion and output voltage regulation. The DC-DC converter portion is driven by the pulse-width modulation (PWM) controller. The controller takes the reference voltage and feedback signals from the output stage and generate the switch control signals. The feedback module regulates the output voltage and compensates it against changes in temperature and load. The short-circuit protection module prevents excessive current output when a short circuit occurs.When power is supplied, the AC input is rectified and filtered to DC and applied to the input side of the PFC. The PFC then performs active power factor correction and provides a DC voltage with constant amplitude and phase angle to the regulator. The DC-DC converter then regulates the output voltage. The PWM controller switches at a fixed frequency and adjusts the width of the pulse according to the reference voltage. This converts the DC input voltage to the desired output voltage. The voltage feedback module compares the feedback voltage and the reference voltage. When the feedback voltage is higher than the reference voltage, the duty cycle of the PWM controller is decreased. Conversely, when the feedback voltage is lower than the reference voltage, the duty cycle of the PWM controller increases. This mechanism is used to actively regulate the output voltage and compensate it against changes in temperature and load.The MAX77816AEWP+T application field is suitable for Notebook power supply solutions, even when the load changes, the output voltage can be held constant. It can also provide short-circuit protection prevents excessive current output when a short circuit occurs. It offer a complete solution for the psu system, with high efficiency, low noise, fast response and reliable protection. The power supply design is quite simple and easy to implement.In conclusion, the MAX77816AEWP+T synchronous DC-DC switch mode controller with a step down regulator provides optimum performance for Notebook power supply solutions. It has an input voltage of 6V to 55V that is capable of supporting up to three output voltages. The PWM controller adjusts the width of the pulse to convert the DC input voltage to the desired output voltage according to its reference voltage. The voltage feedback module makes the changes in temperature and load automatically compensates the output voltage. The MAX77816AEWP+T offers high efficiency, low noise, fast response time, and reliable protection for the power supplies.

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