LP8556TMX-E04/NOPB

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Power management integrated circuits (PMICs) have become incredibly popular in designing electronic devices and appliances. A PMIC is a chip that combines multiple power supply functions, such as voltage regulation and voltage monitoring, onto a single chip, which increases the efficiency and effectiveness of power management in devices. One type of PMIC is the LED driver, which is used in LED backlighting applications.

The LP8556TMX-E04/NOPB is a LED driver from Texas Instruments that is designed for LED backlighting applications. It is a 3-channel, current-sink LED driver that is optimized for driving up to 3 strings of LEDs. It is designed to drive up to 100 mA per channel, making it ideal for driving high-power LEDs in applications such as LED TV backlighting. The LP8556TMX-E04/NOPB is a variable LED current-sink driver that has two adjustable current-control modes, an enabling input, and an enable output for powering on LEDs. It also provides thermal protection for the LEDs, protecting them from overheating.

Application Field Of LP8556TMX-E04/NOPB

The LP8556TMX-E04/NOPB is designed for LED backlighting applications. It is capable of driving up to 3 strings of high-power LEDs with up to 100 mA per channel. The LP8556TMX-E04/NOPB is ideal for applications that require a low-cost, flexible, current-sink LED driver, such as LED TVs, LCD displays, laptop displays, and more. The LP8556TMX-E04/NOPB also provides thermal protection for the LEDs, protecting them from overheating and ensuring a long lifetime.

Working Principle Of LP8556TMX-E04/NOPB

The LP8556TMX-E04/NOPB is a current-sink LED driver, meaning that it sinks current from the LEDs, rather than sourcing it. When the LP8556TMX-E04/NOPB is enabled by an external signal, current is sourced from the main supply and passes through the driver’s output transistors. As the voltage on the output transistors decreases, the amount of current that can pass through them decreases as well. By adjusting the output voltage, the amount of current flowing to the LEDs can be regulated. The LP8556TMX-E04/NOPB also has two adjustable current-control modes, constant-current and LED current dimming, that can be used to increase or decrease the amount of current flowing to the LEDs.

The LP8556TMX-E04/NOPB has an enabling input that can be used to turn the device on and off. This is done by an external signal, such as an on/off switch or a control signal from a processor. There is also an enable output that is used to turn on the LEDs. When the enabling input is switched on, the enable output is driven low, which causes current from the main supply to flow through the output transistors, thus turning on the LEDs.

The LP8556TMX-E04/NOPB also provides thermal protection for the LEDs. This is done by monitoring the temperature of the unit and shutting off the output transistors when the temperature exceeds a certain threshold. This prevents the LEDs from overheating and ensures a long lifetime.

Conclusion

The LP8556TMX-E04/NOPB is a 3-channel, current-sink LED driver that is designed for LED backlighting applications. It is capable of driving up to 3 strings of high-power LEDs with up to 100 mA per channel and is optimized for low-cost and flexibility. The LP8556TMX-E04/NOPB also provides thermal protection for the LEDs, protecting them from overheating and ensuring a long lifetime.

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