TB62747AFNG,C8EL

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PMIC - LED Drivers are electrical components used to drive light emitting diodes (LEDs) in applications such as general lighting, automotive lighting, and signs. They typically regulate the current flowing through the LEDs for accurate and efficient illumination, and can also be used to prevent over-voltage and short-circuit conditions. One example of a PMIC - LED Driver is the TB62747AFNG,C8EL.

Application Field

The TB62747AFNG,C8EL PMIC is a highly integrated LED Driver, commonly used in automotive lighting applications. It is capable of driving up to three high-brightness LEDs in series, and can be used to adjust the brightness of the LEDs. The integrated circuit also has an integrated boost converter, allowing the LED current to be adjusted without the need for an external transformer. Additionally, the TB62747AFNG,C8EL incorporates an overvoltage protection circuit, which helps to protect the LEDs from damage due to excessive voltage from the power supply. Finally, the PMIC also features an innovative hysteresis-type current control loop, which helps ensure accuracy in adjusting the LED current.

Working Principle

The TB62747AFNG,C8EL is based on the boost converter topology, which is one of the most common topologies used for LED Drivers. This type of converter works by taking a low voltage input and increasing it to a higher voltage, which is then used to drive the LEDs. The converter is built using a high-speed switched power stage, which is controlled by a feedback circuit. This feedback circuit is responsible for maintaining the voltage across the LEDs at the desired level, by adjusting the power stage as necessary. Additionally, the converter is also able to adjust the switching frequency of the power stage, allowing it to respond quickly to changes in current demand.

The TB62747AFNG,C8EL also incorporates an integrated current sensing circuit. This circuit senses the current flowing through the LEDs and uses it to adjust the current output of the converter. This allows the converter to accurately adjust the current output to ensure that the LEDs are driven at a constant level. Furthermore, the PMIC also features an integrated hysteresis-type control loop, which helps to ensure accurate and stable current regulation. This hysteresis control loop also helps to reduce power dissipation and increase the efficiency of the PMIC.

Overall, the TB62747AFNG,C8EL is an effective and reliable LED Driver which is well suited to automotive lighting applications. It utilizes a boost converter topology with integrated sensing, current control, and protection circuits, allowing it to provide efficient and accurate LED operation. Additionally, the hysteresis control loop incorporated into the design helps to ensure that current regulation is accurate and stable, further improving the performance of the LED Driver.

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