PCA9955BTWJ Integrated Circuits (ICs)

Voltage - Supply (Max):	5.5V
Supplier Device Package:	28-HTSSOP
Package / Case:	28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Backlight
Dimming:	--
Frequency:	--
Current - Output / Channel:	65mA
Voltage - Output:	--
Series:	--
Voltage - Supply (Min):	3V
Number of Outputs:	16
Internal Switch(s):	Yes
Topology:	--
Type:	Linear
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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PCA9955BTWJ Application Field and Working Principle

Introduction

PCA9955BTWJ is a high-performance, low-power, long-life, three-channel LED display driver. The chip integrates the functions of reset, backlight dimming, MCU–PCA device communication, and display mode changing, which makes it suitable for applications in a variety of industries. In particular, the design of this chip has enabled it to decrease the power consumption of MCU to a great extent and make it a popular choice for user applications.

Applications

PCA9955BTWJ is an LED display driver for applications such as LED signs, LED luminaries and LED lighting systems. It is highly recommend for expert LED lighting designers due to its high-performance, low-power, and long-life. The chip’s three-channel LED drive voltage driving ability, data display control and dimming management makes it extremely suitable for RGB LED displays. The backlight dimming control support also helps to make it suitable for pixel/scanning displays in interactive systems such as industrial controls, navigation systems, etc.

Working Principle

The working principle of PCA9955BTWJ is based on the voltage driving ability and data management. It basically consists of three main stages- reset, backlight dimming, and MCU-PCA device communication. The reset stage is responsible for loading the initial values into the PCA9955BTWJ registers. In the backlight dimming stage, the backlight dimming control signal is connected to the chip with the help of a pulse-width modulation signal. This helps control the LED brightness. The MCU-PCA communication stage enables communication between the MCU and the device. Here, in addition to loading data to the device, the display modes can also be changed.

Conclusion

PCA9955BTWJ is a versatile and high-performance LED display driver. It can be used to drive RGB LEDs, as well as control the backlight brightness. Moreover, its long-life and low-power operation make it suitable for various applications, such as LED signs and lighting systems. PCA9955BTWJ is a great choice for expert LED lighting designers.

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