TLD5541-1QV

LED照明驱动器 LITIX

Description:

The is a synchronous MOSFET H-Bridge DC/DC controller with built in protection features and SPI interface. This concept of a synchronous and seamless buck-boost regulation provides a very efficient solution for circuits where the output load voltage is on the same level as the input voltage, e.g. in short chains with 2 to 3 high power LEDs or laser diodes connected to a 12 V electrical system.

Furthermore in combination with its fast dynamic load jump behavior, it is also an innovative solution for realizing cost-optimized LED headlamps with complete protection and diagnosis features – e.g. by driving two, three or more separately switched LED loads in one string, with up-to 55 V string voltage, with just one TLD5541-1QV.

Summary of Features:

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MOSFET H-Bridge with Single Inductor DC/DC Controller for high power BUCK-BOOST LED control

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Constant Current and Constant Voltage Regulation

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Wide VIN Range IC 4.5 V to 40 V, Power 4.5 V to 55 V

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Wide LED forward voltage Range 2V up to 55V

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Switching Frequency Range from 200 kHz to 700 kHz

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LED current accuracy +/- 3% at TJ = 25°C and 4% over the whole automotive temperature range

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16-bit SPI for diagnostics and control, providing daisy chain capability

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Maximum Efficiency in every condition up to 96%

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Drives multiple loads with a single IC thanks to the Fast Output Discharge operation

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Limp Home Function Fail Safe Mode

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EMC optimized device: Auto and programmable Spread Spectrum

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LED and Input current sense with dedicated monitor Outputs

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Adjustable soft start feature to limit the current peak and the voltage overshoot at start-up

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Smart power protection features for device and load open load, short of Load, Overtemperature

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Enhanced Dimming features: Analog and PWM dimming

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Available in a small thermally enhanced PG-VQFN-48-31 package

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Automotive AEC qualified