LM27953TL/NOPB

Voltage - Output:	--
Base Part Number:	LM27953
Supplier Device Package:	18-TuSMD
Package / Case:	18-WFBGA
Mounting Type:	Surface Mount
Operating Temperature:	-30°C ~ 85°C (TA)
Applications:	Backlight
Dimming:	PWM
Frequency:	500kHz
Current - Output / Channel:	20mA
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	2.7V
Number of Outputs:	4
Internal Switch(s):	Yes
Topology:	Switched Capacitor (Charge Pump)
Type:	DC DC Regulator
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LM27953TL/NOPB - Application Field and Working Principle

PMIC - LED Drivers are one of the most important components of modern electronics that are designed to supply power and control the voltage to LEDs. The LM27953TL/NOPB is a single-channel constant current PMIC, which is targeted for lighting applications. This chip is able to provide a variety of features and benefits, including a fast and efficient current regulation, wide input voltage range, and low quiescent current consumption.The LM27953TL/NOPB is designed to drive LEDs in lighting applications, such as general-purpose lighting, automotive lighting, residential lighting, and portable lighting. It can be used to drive both high power and low power LEDs, and it is compatible with several types of LED packages, including SMD, COB, and point-source. The LM27953TL/NOPB has a wide input voltage range of 3.5V to 26V, allowing it to be used with a variety of power supplies.To adjust the LED current, LM27953TL/NOPB also supports analog dimming through a digital-to-analog converter (DAC) input. The current can be adjusted by changing the digital control word (DCW). The LM27953TL/NOPB incorporates a voltagemode system and current-mode control loop that allows it to regulate the LED current accurately while minimizing the power losses. The LM27953TL/NOPB uses a proprietary low-saturation architecture to minimize the power wasted in the voltage drop across the internal MOSFET switches.The LM27953TL/NOPB also features a low quiescent current consumption of only 3.2uA, which helps save battery power in portable applications. The chip is available in a space-saving 3.0 x 3.0mm QFN package, making it ideal for space-constrained designs.In summary, the LM27953TL/NOPB is a single-channel PMIC suitable for lighting applications. It has a wide input voltage range, fast and efficient current regulation, low quiescent current consumption, and an analog dimming capability. The LM27953TL/NOPB is available in a 3.0 x 3.0mm QFN package, making it suitable for space-constrained designs. It is an ideal choice for applications such as general-purpose lighting, automotive lighting, residential lighting, and portable lighting.

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