AAT1277IUT-T1

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PMIC - LED Drivers

The AAT1277IUT-T1 LED constant current controllers are specially designed for LED lighting applications, such as automotive, consumer, industrial and medical lighting designs. They are power management integrated circuits (PMICs) used to deliver precision LED current regulation and system protection.

AAT1277IUT-T1 Application Field

The AAT1277IUT-T1 IC is employed in white-LED lighting (or backlighting) designs, RGB color variations, touchscreens, illuminance enhancement and other applications. The IC provides up to a maximum of 1A bias current with 0.1A accuracy. Its set frequency ranges from 200kHz to 1MHz and the PWM dimming range is 6%. The device has a two-ip terminal enable connection suitable to direct control through logic, microcontroller or other driver ICs.

Working Principle

AAT1277IUT-T1 is designed to provide high-efficiency driving of LEDs. The device has both constant current and constant voltage control, normally with a maximum regulated current of 1A and output voltage of up to 48V. The AAT1277IUT-T1 also has a shutdown mode which ensures very low quiescent current by shutting off bias current. This feature eliminates the need for a power switch when the device is used in lighting applications.

This IC is also very suitable for complex, multi-string and large current design. With an excellent internal circuitry and digital control, AAT1277IUT-T1 can be programmed directly with a resistor to set up constant current output and digital PWM dimming. Its wide, 6% dimming range is also adjustable providing excellent flicker-free dimming performance. Other features include power good monitoring, over-current and temperature protection.

Conclusion

In summary, the AAT1277IUT-T1 LED constant current controller is suitable for LED lighting and other applications requiring an accurate and efficient power supply. With its wide current range and high precision, it is the perfect IC for a variety of LED designs.

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