BQ76PL536ATPAPTQ1

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Introduction

The BQ76PL536ATPAPTQ1 is a power management integrated circuit (PMIC) designed for modern lithium-ion (Li-Ion) batteries. As a type of Battery Management, it provides device-level data and control functions to both a Li-Ion battery pack and its host application, such as automotive and industrial equipment. The BQ76PL536ATPAPTQ1 is a highly integrated PMIC that includes a built-in System I/O (SIO) controller, two integrated buck/Boost converters, two LDOs, two fuses, two GPIOs, one temperature sensor, one battery cell temperature monitor, and an ADC for sensing current and voltages.

SIO (System I/O)

The BQ76PL536ATPAPTQ1’s SIO Controller is the interface between the PMIC and any external microcontroller. It is designed to support a range of communication protocols, such as I2C/Lin Bus and CAN Bus, allowing easy integration into existing designs. Through the SIO, the host microcontroller can access the PMIC\'s current, voltage, temperature and other data to help monitor and protect the battery pack.

Converters

The BQ76PL536ATPAPTQ1 includes two integrated synchronous buck/boost converters，Each of these converters can operate in both buck and boost mode, with output voltage ranges from 1.2V to 18V and current capability of up to 12A. The converters are also capable of providing up to 33mV accuracy over output voltage up to 14.4V.

LDOs (Low-Drop Out Regulators)

The PMIC also includes two internal low-dropout (LDO) regulators. The two LDOs can provide a maximum output current of 500mA with an adjustable output voltages from 0.8V to 5.0V. The two LDOs also feature under-voltage protection and short-circuit protection, ensuring the highest level of safe operation.

GPIOs

The BQ76PL536ATPAPTQ1 has two General purpose input/output pins that can be used to monitor and control various components of the battery pack. The GPIOs use integrated comparators to detect the pin state and can be used to monitor the voltage, current or temperature levels in the pack.

Fuses

The PMIC includes two integrated fuses capable of carrying up to 0.5A of current. The two fuses are used for short circuit protection and can be set to trip at a maximum current level of up to 0.5A.

Temperature Monitor

The BQ76PL536ATPAPTQ1 also has an on board temperature monitor designed to detect over-temperature conditions and provide protection to the battery pack. The temperature monitor uses an analog comparator to compare the cell temperature to a predetermined threshold and can trigger a system-level error if the temperature exceeds the threshold.

ADC

The PMIC is also equipped with an analog-to-digital converter (ADC). The ADC can measure battery voltage, current and temperature, providing an accurate and up-to-date view of the battery pack\'s performance. This can help detect faults such as over-voltage and over-temperature conditions within the battery pack.

Conclusion

The BQ76PL536ATPAPTQ1 is a powerful and integrated PMIC for lithium-ion battery packs. Its SIO Controller, converters, LDOs, GPIOs, fuses, temperature monitor and ADC provide full monitoring and protection capabilities, resulting in longer and safer operation of the battery pack.

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