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Eliminate PWM audible noise

Sensor Technology

LED Backlight Drivers
LED Backlight Drivers

The A8060x family from Allegro MicroSystems is a series engineered with a patented Pre-Emptive Boost (PEB) control. It eliminates typically audible noise from ceramic output capacitors during PWM dimming, reduces considerably Vout ripple, and requires less output capacitance overall. These drivers can achieve a LED brightness contrast ratio of 15,000:1 when using PWM-only dimming at 200 Hz, but also a higher ratio of 150,000:1 when using a combination of PWM and analogue dimming. 


Wide input range from single power supply from 4.5 to 40 V


The ALT80600 and A80603 combine a switching converter with integrated MOSFET and four current sinks, and the A80601 and A80602 drive an external boost FET for higher output power. These devices can be configured in a boost or single-ended primary-inductor converter (SEPIC) topology. They cover a broad range of automotive applications such as Audio-Video systems, instrument clusters and heads-up display (HUD).

Posted on April 25, 2019 - (147 views)
Allegro MicroSystems Europe Ltd
Melita House 124 Bridge Road
KT16 8LH Chertsey - United Kingdom
+44 1932 566000
+44 1932 571021
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