LED Driver AT8001 Features and Applications

December 30, 2022

The AT8001 is a high-efficiency driver chip for the backlight drive field, allowing a wide power supply voltage range of 2.7V to 5.5V, which is particularly suitable for lithium battery-powered devices. The AT8001 sets the LED current through an external resistor. When the power supply voltage is above 3V, the AT8001 can drive up to 30mA per channel and the total current drive capability can reach 120mA. The AT8001 can adaptively switch between the 1x operation mode or the 1.5x operation mode according to the power supply voltage and load conditions, which can reduce the internal power consumption and thus ensure a relatively high working efficiency. The AT8001 can still ensure better current matching when the parallel white LED turns-on voltage is relatively large. The AT8001 uses an inductorless charge pump boost principle. The peripheral device requires only two 1μF input and output capacitors and two 0.47μF charge pump capacitors. The superior circuit control features ensure low power supply inrush current and EMI. The AT8001 is available in lead-free QFN 3 x 3 package and is RoHS compliant. The operating frequency is 1MHz in 1.5 times working mode. The AT8001 has a shutdown mode. In shutdown mode, the quiescent current of the AT8001 is less than 0.1μA.

China lighting network technical papers · LED lighting AT8001 structure diagram:

Device Features China Lighting Network Technical Papers · LED Lighting ● Drive up to 4 LEDs, Maximum Current per LED: 30mA

China Lighting Network Technical Papers, LED Lighting, Current Matching Accuracy: 0.4% (Typical)

China Lighting Network Technical Papers · LED Lighting ● High-efficiency 1x/1.5x mode, adaptively switchable according to input voltage and load conditions, efficiency up to 90%

China Lighting Network Technical Papers · LED Lighting ● Support PWM (frequency range: 0Hz ~ 50KHz) brightness adjustment method China Lighting Network Technical Papers · LED lighting ● low input current fluctuations and low EMI

China Lighting Network Technical Papers · LED Lighting ● No Peripheral Inductors China Lighting Network Technical Papers · LED Lighting ● Switching Frequency: 1MHz

China Lighting Network Technical Papers, LED Lighting, Overcurrent Protection and Overheat Protection, China Lighting Network, Technical Papers, LED Lighting, Operating Voltage Range: 2.7V to 5.5V

China Lighting Network Technical Papers ·LED Lighting ●Small 3mm*3mm QFN 16L Package China Lighting Network Technical Papers ·LED Lighting ●Shutdown Current ICC <0.1μA

China Lighting Network Technical Papers · LED Lighting ● RoHS compliant, 100% lead-free package China Lighting Network Technical Papers · LED lighting AT8001 pin assignments and instructions:

Applications China Lighting Network Technical Papers LED Lighting Mobile Phones China Lighting Network Technical Papers LED Lighting Digital Cameras

China Lighting Network Technical Papers · LED Lighting ● MP3, PMP, PDA

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Mr. Wayne Tang

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