AS1122B-BQFT

Voltage - Output:	30V
Supplier Device Package:	24-QFN (4x4)
Package / Case:	24-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Backlight, Signage
Dimming:	--
Frequency:	--
Current - Output / Channel:	40mA
Series:	--
Voltage - Supply (Max):	3.6V
Voltage - Supply (Min):	2.7V
Number of Outputs:	12
Internal Switch(s):	Yes
Topology:	--
Type:	Linear
Part Status:	Active
Packaging:	Tape & Reel (TR)

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AS1122B – BQFT LED Driver: Applications and Operating Principle

The AS1122B-BQFT is a high-performance LED driver with unique features that make it ideal for a variety of uses. This LED driver can be used with both AC and DC inputs, allowing it to be utilized in a range of lighting applications. It can be used to drive low-power LED lamps, power LED strips, and provide most LED signage requirements. This LED driver is extremely energy efficient and offers a long lifespan.

Components and Features of the AS1122B-BQFT

The AS1122B-BQFT is a power management integrated circuit (PMIC) that offers a wide range of features and benefits. It is a two-stage switching regulator with a discrete power FET on the input stage. This eliminates the need for a transformer and allows for a more compact form factor. The output stage contains a 12-Volt DC-LED driver controller, along with MOSFETs for improved efficiency.The AS1122B-BQFT also features an adjustable 16-bit digital brightness control with a dynamic range from 0 to 100%. Moreover, it has an adjustable frequency up to 1 MHz, allowing for higher power and expanded dynamic range. This enhances the versatility and versatility of the device, as it can be used for single- or dual-channel applications. Additionally, this LED driver provides a power efficiency of up to 94%, resulting in increased energy savings.Finally, the AS1122B-BQFT comes with an integrated overload protection feature. This eliminates the need for a separate thermal fuse or current sense circuit, reducing the complexity of the system and providing the necessary safeguard against unsafe operation of the device.

Applications and Benefits of the AS1122B-BQFT

The AS1122B-BQFT is a versatile LED driver and can be used in a broad range of applications. It is suitable for both AC and DC voltage-driven LED applications, allowing for easy integration into existing systems. This LED driver can be used for low-power LED lamps, LED light strips, and other LED signage requirements. It is capable of driving up to 14 LEDs at once, and offers the necessary flexibility for even the most demanding lighting applications.In terms of LED lighting systems, this LED driver is extremely efficient, offering up to 94% power conversion efficiency. This allows for maximum energy savings and a longer system lifespan. The integrated overload protection feature eliminates the need for additional components, further reducing system complexity and improving reliability.Finally, the adjustable digital brightness control with a dynamic range from 0 to 100%, along with the adjustable frequency up to 1 MHz, enables easy customization of the LED lighting system. This provides the necessary flexibility for applications requiring a customized LED lighting experience.

Working Principle of the AS1122B-BQFT

The AS1122B-BQFT operates on a two-stage switching regulator with a discrete power FET on the input stage, and a 12-Volt DC-LED driver controller on the output stage. The input stage contains the FET, as well as a voltage divider to create a reference voltage. This reference voltage is compared to an external reference, allowing for easy and accurate control of the input voltage.Once the voltage is set, the output stage begins to work, controlling the voltage and current applied to the LEDs. The main controller will determine the current flowing through the LEDs based on the input voltage, with the output voltage regulated by the output stage MOSFETs. The integrated overload protection feature used in this LED driver will also help to avoid any potential damage to the device due to overcurrent situations.The adjustable digital brightness control feature provides precise control over the brightness of the LEDs. This feature offers multiple levels of brightness, each of which can be chosen based on the needs of the application. Additionally, the adjustable frequency up to 1 MHz allows greater control of the LED lighting system, increasing its versatility and flexibility.

Conclusion

The AS1122B-BQFT is a high-performance LED driver with a range of features that make it suitable for a variety of applications. It can be used with both AC and DC input, and provides an adjustable digital brightness control with a dynamic range from 0 to 100%. Additionally, the adjustable frequency up to 1 MHz and the integrated overload protection feature offer further improvements to the LED lighting system. The AS1122B-BQFT is a robust and efficient LED driver, ideal for both commercial and residential applications.

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