LED2472GBTR Integrated Circuits (ICs)

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PMIC - LED Drivers, this refers to the driver power supply integrated circuit integrated in the IC package, which adopts the pulse width modulation (PWM) control principle. When the voltage and current are adjusted, the duty cycle of the PWM output signal is adjusted, so as to obtain the desired output voltage. The primary application fields of the Part Number LED2472GBTR are mobile display backlighting, LCD monitor backlighting, etc. In particular, it is suitable for the application of high brightness OLED displays.

Generally speaking, a Power Management Integrated Circuit (PMIC) is a device that combines multiple analog and digital circuit functions together onto a single IC package. Its main purpose is to reduce the number of ICs needed for a particular application so as to reduce the system cost and power consumption involved. LED drivers can include a number of components – such as a voltage regulator, current sense amplifier, PWM controller, boost converter and other current-regulation components – and can be broadly categorized into two types: constant current drivers and constant voltage drivers.

LED2472GBTR is a constant-current LED Driver IC implementing a PWM dimming control. This device simplifies the implementation process of LED lighting systems by eliminating the need for external components. It has a dedicated output stage configured as a fixed voltage source, with the LED load current being set by an internal current-sensing circuit. It also features an onboard voltage regulator which maintains the voltage at the output despite changes in input voltage due to line transients. The device is powered by an input voltage range of 2.7V to 5.5V and can provide a current of up to 3A output.

The main components of the LED2472GBTR include an on-board Internal PWM Controller, a Buck Converter, a Sense Resistor and a Current Measurement Unit. The Internal PWM Controller combines the driver’s control logic with the buck circuit, ensuring smooth and precise regulation of the output current. The Sense Resistor is a precision resistor used to sense the LED string current and provide a proportional voltage signal. The current measurement unit converts the voltage signal from the sense resistor into a digital representation of the current which can then be used to precisely regulate its output. The device also features an internal Over Temperature Protection (OTP) circuit monitoring the junction temperature, with output voltage shutdown or reduced dimming when the temperature exceeds a certain threshold.

In operation, the LED2472GBTR control pin is connected to a PWM signal generated by an external controller such as a microcontroller. The duty cycle of this signal is used to set the output current, or the brightness of the LED string. The input voltage is also taken from the external controller, which can be regulated to ensure a regulated output voltage is delivered to the LED strings. The current sense resistor is then used to detect any deviations in the LED string current, with the current measurement unit compensating for any such changes and providing feedback data to the internal logic, allowing the output current to be precisely regulated.

The LED2472GBTR is a highly reliable LED driver IC, which is highly reliable and successfully delivers the specified output current to LED strings. It offers an excellent solution for implementing high-brightness OLED displays, and is also ideal for lighting applications due to its ability to deliver precise currents and adjustable brightness levels. The internal over-temperature protection function keeps the device safe and reliable, helping to ensure the consistent performance and longevity of the finished product.

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