MAX17080GTL+

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MAX17080GTL+ is one of the special purpose voltage regulators that falls under the Power Management IC (PMIC) category. It is a comprehensive, energy-efficient battery monitoring system that monitors battery stacks and systems with 2-8 cells. This system comprises a battery stack voltage monitor, temperature sensor and a micro-controller that is used for controlling settings and measurements. It also provides protection against high and low battery voltage, temperature, current and overcharge.

The main application field of MAX17080GTL+ is in lithium-ion and lead-acid battery stack monitoring for automotive, industrial, medical and personal electronics devices. Additionally, this system is used for fuel cell and hybrid electric vehicle applications. This system is capable of accurately monitoring and assessing the state of charge of a battery stack, working within an operating voltage range of 4.75V to 5.5V and temperatures ranging from -40°C to +125°C.

The MAX17080GTL+ system contains two separate power buses to ensure protection against voltage spikes. The first bus provides power to the micro-controller, battery stack monitoring circuit and LED display. The second bus provides power to the temperature sensor. Both buses are powered through a printed circuit board with corresponding footprints.

When the battery stack voltage drops below 13.00V, the MAX17080GTL+ system enters a low battery voltage lock-out state. This is triggered by the Micro-Controller which monitors the battery voltage and informs the driver IC to shut down the system in case of a low battery voltage. Additionally, it also monitors battery temperature and current to provide optimum protection for the battery stack.

The working principle behind the MAX17080GTL+ system is that the micro-controller samples an external voltage by means of its A/D converter and then modulates the ADC result to the desired voltage. It then digitally communicates with the Display driver and Temperature sensor over an I2C serial interface to update the display and take temperature measurements.

The micro-controller has a programmable current and temperature limit feature. This allows the user to adjust the threshold by using a kind of “up-down” 3-output GPI in order to protect against over-temperature and over-current failure. The micro-controller is capable of driving up to 5 external LEDs either in forward direction or reverse direction depending on the voltage and temperature.

The MAX17080GTL+ system also features a cell balancing capability which enables the user to balance the cells of the battery stack. This is achieved using a MAX Resistive Shunt device that is connected between the cells. The MAX Resistive Shunt is then monitored by the micro-controller which adjusts the shunt resistance by either increasing or decreasing its voltage level.

In conclusion, MAX17080GTL+ is a high-quality, energy-efficient system used for monitoring battery packs and systems with 2-8 cells. Its main application is in lithium-ion and lead-acid battery pack monitoring systems for automotive, industrial, medical, and personal electronics devices. Its working principle is based on the micro-controller’s ability to sample an external voltage, modulate the ADC result, and digitally communicate with the display driver and temperature sensor. Moreover, it features a cell balancing capability and a programmable current and temperature limit feature for optimum protection.

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