RT9363AGQW

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Introduction to RT9363AGQW

The RT9363AGQW is a high-efficiency LED Driver IC by Richtek. This LED driver is meant to replace a linear LED current source with efficiency levels up to 85%. As such, the RT9363AGQW becomes an ideal choice for applications such as automotive headlamps and lighting, projector bulbs, and hand-held devices.

The RT9363AGQW features a highly-integrated design, which significantly reduces the external components required for typical LED driver designs. With this IC comes features such as input voltage range from 4.5V to 28V, adjustable constant current of up to 18V, PWM dimming, and thermal shutdown protection.

In addition, the RT9363AGQW also has an internal power saving mode that automatically reduces both the quiescent current and the operating current during operation. This gives the IC a low shutdown current, reducing standby power and ultimately resulting in longer battery life.

Application Field and Working Principle

Typically, the RT9363AGQW is used in automotive headlight and lighting applications, projector bulbs, and hand-held devices, such as mobile phones, tablets, and consumer electronics, which require higher efficiency and smaller external components.

The RT9363AGQW belongs to the PMIC - LED Driver category, which is designed to provide high-efficiency DC-DC conversion in space-constrained applications. They are also designed to meet a high level of compatibility, with adjustable constant currents and PWM dimming, for different types of LEDs.

The RT9363AGQW works on a principle of constant current control, combined with a feedback loop, to ensure that the LED current always remains constant. To do this, a regulating voltage is derived from a voltageamp or precision resistor, which is then compared to the LED current and adjusted accordingly. If the LED current drops too low, the IC will increase the current, and if the LED current is too high, the IC will reduce the current.

The RT9363AGQW also offers other advantages, such as a wide input voltage range of 4.5V to 28V, high-efficiency levels up to 85%, and a soft-start that reduces the inrush current. This IC is also protected by an adjustable current limit and an over-temperature shutdown.

Conclusion

In conclusion, the RT9363AGQW is a high-efficiency, low-component LED Driver IC with a highly-integrated design. With wide voltage input ranges, adjustable constant current and PWM dimming, and a power-saving mode, this IC is ideal for use in automotive headlight and lighting applications, projector bulbs, and hand-held devices.

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