THL3501

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The THL3501 is a high-efficiency single-stage boost LED driver with output current of up to 350mA. It is designed to operate from an input voltage as low as 2V and is capable of driving LED strings up to 14V. As a member of the PMIC (Power Management IC) family, the THL3501 provides a versatile and efficient solution for driving a variety of LED lighting applications. With the perfect combination of features and performance, the THL3501 is a valuable tool for realizing high-quality LED lighting designs.

The THL3501 has two independent stage outputs, a high-side switch and a low-side switch. This allows the driver to be used in two different applications: as a single-stage boost driver or as a two-stage boost driver.

When used as a single-stage boost driver, the high-side switch is always used to regulate the output voltage of up to 14V. The low-side switch is used to regulate the output current. The current flow is measured using an integrated current-sense resistor, which is located between the low-side switch and the inductor. This allows the driver to accurately control the output current up to 350mA.

As a two-stage boost driver, the THL3501 is capable of driving LED strings up to 25V. The high-side switch is used to regulate the output voltage of up to 14V and the low-side switch is used to regulate the output current up to 100mA. The current flow is monitored using an integrated current-sense resistor between the high-side switch and the inductor, allowing the driver to accurately control the output current up to 100mA.

The THL3501 also includes a built-in programmable PWM dimming feature, allowing the user to adjust the brightness of the LEDs without affecting their power efficiency. The PWM dimming frequency can be adjusted from 30Hz to 250kHz to ensure precise control over the LED brightness.

In addition, the THL3501 has an integrated error detection circuit, which can detect a wide range of fault conditions and shut down the LED driver safely. This prevents possible damage to the LEDs caused by over-voltage or under-voltage conditions. The THL3501 also provides an adjustable soft start function, which allows the output voltage to slowly ramp up, eliminating transients and ensuring smooth LED startup.

Overall, the THL3501 is a highly efficient and highly versatile single-stage or two-stage boost LED driver. Its integrated features, such as the PWM dimming function, the error detection circuit, and the adjustable soft start function, makes it an ideal choice for a wide range of lighting applications. As a member of the PMIC family, the THL3501 is a valuable tool for realizing high-quality LED lighting designs.

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