Buck-Boost LED Drivers
Analog Devices buck-boost LED drivers allow LED bias when the input voltage is either above or below the LED voltage. This is ideal in cases such as a single cell lithium-ion (Li-Ion) battery driving a single LED where the input voltage can vary from 4.2 V fully charged down to 2.7 V fully depleted, while the LED forward voltage can vary from 2 V to 4 V depending on brightness and temperature. Our LED drivers offer the highest efficiency, lowest noise, and the smallest footprints. Our synchronous 4-switch Buck-Boost LED Driver architecture transitions between buck, pass-through and boost operating modes seamlessly, offering a well-regulated output despite the wide variations of the input voltage. Other differentiating features include integrated Schottky diodes, accurate LED current matching, and multiple output capability.
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Design Notes
- DN567 - 60V 2MHz Buck-Boost Controllers Regulate High Power Voltage and Current with High Efficiency and Low EMI PDF
- DN557 - Low EMI LED Driver Features 2A, 40V, Integrated, Synchronous Switches for Automotive Lightin PDF
- DN556 - 3A, 1MHz Buck Mode LED Driver with Integrated Voltage Limiting PDF
- DN548 - 60V Buck-Boost LED Driver with Up to 98% Efficiency Has Internal PWM Dimming and Spread Spectrum PDF
- DN376 - Monolithic Converter Drives High Power LEDs PDF
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Technical Articles Page
- 60V 2MHz Buck-Boost Controllers Regulate High Power Voltage and Current with High Efficiency and Low EMI
- Low EMI LED Driver Features 2A, 40V, Integrated, Synchronous Switches for Automotive Lighting
- 3A, 1MHz Buck Mode LED Driver with Integrated Voltage Limiting
- Buck-Boost LED Driver Reaches 98% Efficiency, Features Internal PWM Dimming and Spread Spectrum without Flicker
- Spread Spectrum Frequency Modulation Reduces EMI
Videos
- Low EMI LED Driver with Synchronous Internal 2A Switches
- 60V 8-Switch Matrix LED Dimmer (LT3965)
- 60V LED Driver with Internal 4A Switch for Automotive Lighting (LT3952)
- High Power Three-Channel LED Driver (LT3797)
- 60V, 98% Efficient, 4-Switch Synchronous Buck-Boost Controller IC Drives LEDs, Regulates Voltage and Charges Batteries