RT9378BGQW Integrated Circuits (ICs)

Voltage - Output:	--
Supplier Device Package:	12-WQFN (2x2)
Package / Case:	12-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Backlight
Dimming:	PWM
Frequency:	1MHz
Current - Output / Channel:	25mA
Series:	--
Voltage - Supply (Max):	4.5V
Voltage - Supply (Min):	2.8V
Number of Outputs:	4
Internal Switch(s):	Yes
Topology:	Switched Capacitor (Charge Pump)
Type:	DC DC Regulator
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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Introduction

The RT9378BGQW is a PMIC - LED Drivers intended for multilayer ceramic packages. It has a wide range of applications in various electronics including mobile phones and other portable devices. As a PMIC - LED Drivers, it has various functions related to the control and management of the device\'s lighting circuit. In this article, we will take a look at some of its key features, its application field, and the working principle behind it.

Key Features

The RT9378BGQW PMIC - LED Drivers offers a wide range of features including:* High efficiency up to 95%.* Can operate in a wide temperature range from -40℃ to 85℃.* Can provide protection over voltage, under voltage, and over temperature.* Comes with a battery charging circuit with controllable charging current and voltage.* Includes built-in adjustable LED brightness control.* Offers a wide dynamic current range from 1mA to 500mA without the need for additional control circuitry.

Application Field

The RT9378BGQW is mainly used in devices that require efficient lighting circuits, such as mobile phones, digital cameras, and gaming consoles. It is an ideal choice for LED lighting applications because of its wide dynamic current range, high efficiency, and adjustable LED brightness control. It is also used in displays and interior applications such as automotive lighting and displays, like LCD and LED TV sets, which require efficient light management.

Working Principle

The RT9378BGQW works by regulating and controlling the flow of current through the LED lights. It uses a built-in high efficiency boost converter and voltage regulator circuit to control the flow of current through the LEDs. This current flow is adjusted to ensure the desired output power or light intensity. The current flowing through the LEDs is then monitored and the RT9378BGQW will auto-adjust the output current in order to maintain the desired light intensity.In order to protect the device from over voltage and under voltage, the RT9378BGQW includes a power monitoring circuit which can detect any excessive or low voltage buildup and cut off the current supply if necessary. Additionally, it also includes an adjustable over-temperature protection circuit which will protect the device from overheating.

Conclusion

The RT9378BGQW is a PMIC - LED Drivers intended for multilayer ceramic packages. It offers various features including high efficiency, wide temperature range, over voltage, under voltage, and over temperature protection circuit. It is mainly used in mobile phones, digital cameras, gaming consoles, LCD and LED TVs sets and automotive lighting and displays. The RT9378BGQW works by regulating and controlling the flow of current through the LED lights and auto-adjusting the output current in order to maintain the desired light intensity.

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