LM3502SQX-44/NOPB

Voltage - Output:	44V
Base Part Number:	LM3502
Supplier Device Package:	16-WQFN (4x4)
Package / Case:	16-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Backlight
Dimming:	PWM
Frequency:	1MHz
Current - Output / Channel:	750mA (Switch)
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	2.5V
Number of Outputs:	2
Internal Switch(s):	Yes
Topology:	Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LM3502SQX-44/NOPB PMIC - LED Drivers

The LM3502SQX-44/NOPB from Texas Instruments is a compact LED driver IC specifically designed for LED displays and general lighting applications. The IC package is extremely small, with dimensions just 2.8 mm x 2.1 mm, making it ideal for embedded designs with minimal space or budgets. This IC has many features such as low power consumption, low EMI and ripple noise, and very low voltage dropout. Application fields of the IC are primarily in LED display and general lighting systems, including power sequencers, variable color controllers and dimmers.The LM3502SQX-44/NOPB is an impressive, efficient, and highly reliable IC designed to control a wide variety of LEDs and provide adjustable light intensity. This IC features a floating output, digital dimming control, short circuit protection, and over-temperature protection. On-board circuitry monitors the output voltage and current in real-time and automatically adjusts to any changes in the external environment. Linear regulation keeps the output voltage and current within a certain range, thus keeping the LED intensity constant even under varying environmental conditions.The working principle behind the LM3502SQX-44/NOPB relies on the linear regulation technique. This technique involves the use of a circuit that adjusts the output voltage and current in real-time, ensuring that the LEDs maintain a constant intensity despite changes in input voltage and/or temperature. Additionally, the power savings of up to 99.5% with this IC make it an efficient, energy-saving solution in LED applications.The LM3502SQX-44/NOPB has a total of 2 output pins. The first pin is the ‘Vfb’ pin, which is responsible for providing feedback to the constant current source. On the second pin, the ‘Out’ or output pin, the LED current is directly regulated by the data register settings. It is possible to dim fading and strobing LED segments with their own individual current settings.The IC includes an integrated over-temperature protection circuitry that monitors the die temperature and shuts off the LED current if the die temperature goes above a certain threshold. This protects the IC from overheating when running at higher output currents. It also ensures that the LED gets the appropriate heat dissipation it needs in order to function properly.The LM3502SQX-44/NOPB requires a few external passive components to operate at its full functionality. These components include resistors, capacitors, and a thermistor to ensure stable and efficient operation of the IC. The required components depend upon the specific application field and aim to control the current level, suppress noise and ripple, and monitor the die temperature.The LM3502SQX-44/NOPB is a highly reliable, power-saving integrated circuit designed for LED display and general lighting solutions. Its linear regulation technique keeps the LED intensity constant, even under changes in the environment, and its integrated over-temperature protection circuitry ensures that the LED gets the appropriate heat dissipation necessary for proper operation. Furthermore, its small size makes it perfect for embedded designs with minimal space or budgets.

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