BQ7790400PWR

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Function:	Battery Protection
Battery Chemistry:	Lithium-Ion
Number of Cells:	3 ~ 4
Fault Protection:	Over Current, Over Temperature, Over/Under Voltage
Interface:	--
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-TSSOP

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Introduction
BQ7790400PWR is a highly integrated low-cost power management solution designed for rear-view automotive rear-view mirror drive applications. It improves the efficiency, performance and accuracy of the system. It integrates the buck-boost converter and step-down converter into a single silicon package. It has high current capability, wide operating voltage range and fast transient response, making it ideal for low power linear regulator, low power step-down converter and short circuit protection applications.Application Field
BQ7790400PWR is a buck-boost and step-down voltage regulator integrated with its own built-in low dropout (LDO) voltage regulator, which allows it to provide power more efficiently to the system components such as microcontrollers, sensors, display and lighting systems. Its versatile built-in power control functions can control output voltage accuracy, reduce power dissipation, and improve the system efficiency. Due to its wide operating voltage range and multiphase design, BQ7790400PWR is able to work as a battery management integrated circuit for automotive rearview mirror drive applications.Overview
BQ7790400PWR is an optimized power management circuit designed for automotive rear-view mirror drive applications. It provides a wide range of operating voltage from 0.3V to 4.5V. It has an adjustable output from 0.025V to 4.5V with a accuracy of 10 mV. It also provides a very lowdropout (LDO) voltage regulator which allows it to work efficiently in low voltage environment in order to improve the system performance. Moreover, it has an integrated short-circuit protection circuit which can protect the system against damages caused by short-circuits.Working Principle
BQ7790400PWR works on a buck-boost and step-down voltage regulator principle. The system provides a low dropout (LDO) voltage regulator which means that it can work efficiently in low voltage environment and provide power more efficiently to the system components. In order to reduce power dissipation, the system operates at two different frequencies: the fixed frequency or a variable frequency. The fixed frequency mode allows for a steady output voltage, while the variable frequency mode lets the system adjust the output voltage according to the current load. Furthermore, it also provides a wide operating voltage range from 0.3V to 4.5V and an adjustable output from 0.025V to 4.5V with a accuracy of 10 mV. Additionally, the integrated short-circuit protection circuit helps protect the system from damages caused by short-circuits. Conclusion
BQ7790400PWR is a highly integrated low-cost power management solution designed for automotive rear-view mirror drive applications with a wide operating voltage range, adjustable output voltage and high current capability. It is also equipped with a low dropout voltage regulator, short-circuit protection circuit, and faster transient response, making it ideal for battery management applications.

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