LP5521YQX/NOPB Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	DC DC Regulator
Topology:	Switched Capacitor (Charge Pump)
Internal Switch(s):	Yes
Number of Outputs:	3
Voltage - Supply (Min):	2.7V
Voltage - Supply (Max):	5.5V
Voltage - Output:	4.5V
Current - Output / Channel:	25.5mA
Frequency:	1.25MHz
Dimming:	I²C
Applications:	Backlight
Operating Temperature:	-30°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	24-WFQFN Exposed Pad
Supplier Device Package:	24-WQFN (4x5)
Base Part Number:	LP5521

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Photo MOSfet Integrated Circuit (PMIC) LED Drivers are integrated circuits typically used in light emitting diode (LED) devices, to control and regulate the operation of LEDs. In this article, we will discuss the application field and working principle of the LP5521YQX/NOPB PMIC LED Driver.The LP5521YQX/NOPB is a PMIC LED Driver designed and manufactured by Texas Instruments. It is a quad-channel, constant-current, low-power driver IC, capable of driving up to 48 LEDs and equipped with an adjustable ?xed frequency PWM dimmer functionality. It features an integrated Flexible Control Interface and is capable of controlling multiple independent LED channels in parallel, providing greater flexibility and design freedom.The LP5521YQX/NOPB is designed and optimized for a wide range of applications, including automotive lighting, retail lighting, general illumination, and other applications. It features an integrated current sensing and regulation capability, providing accurate and reliable current control. It also features a programmable power saving mode, allowing designers to save power by programming the driver to automatically enter a low-power mode when the LEDs are off.The application field and working principle of the LP5521YQX/NOPB PMIC LED Driver can be broadly summarised as follows. The LP5521YQX/NOPB is a low-power, constant-current, quad-channel driver IC, providing the capability to drive up to 48 LEDs in parallel. It features an integrated Flexible Control Interface and programmable power-saving mode, allowing designers to customize the driving configuration to any specific application. The LP5521YQX/NOPB integrates a current sensing and regulation capability, allowing for accurate and reliable current control.The working principle of the LP5521YQX/NOPB is based on its integrated Flexible Control Interface. The Flexible Control Interface provides an intuitive and straightforward programming experience, combining direct register setting, indirect register access, and direct command mode programming. The combination of these features allow the designer to easily customize the configuration of the IC and adapt the IC to any specific application.In addition to its integrated Flexible Control Interface, the LP5521YQX/NOPB implements a two-stage, low-power mode, allowing the IC to adjust itself automatically to conserve power. When the LEDs are off, the LP5521YQX/NOPB reduces its supply current consumption by entering a low-power mode. In this mode, the IC reduces its supply current consumption by up to 75%, compared to the regular operating mode. This feature allows designers to optimize their designs for energy efficiency and power savings.Finally, the LP5521YQX/NOPB features an integrated current sensing and regulation capability. This feature provides the user with complete control over the LED current and brightness, while ensuring the LEDs are driven with the correct amount of current at all times. The integrated current sensing and regulation feature ensures that the LED current is accurate and consistent, even in the presence of varying supply voltages. In summary, the LP5521YQX/NOPB is a low-power, quad-channel, constant-current, PMIC LED Driver. It is a powerful and flexible IC, allowing designers to customize the IC to any specific application. It integrates a Flexible Control Interface, low-power mode, and current sensing and regulation capabilities, all of which provide the user with greater control, flexibility, and power savings.

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