Texas Instruments introduced a 1,5 A constant-current DC-DC buck converter LED driver with a combination of frequency synchronisation, pulse-width modulation (PWM) dimming and thermal foldback. The TPS92510 features a wide 3,5 V to 60 V input voltage operating range and integrated MOSFET.
Together with TI’s WEBENCH LED Architect, lighting developers can quickly design a power management circuit to drive a string of up to 17 high-brightness (HB) LEDs at up to 97% power efficiency in automotive, industrial and general illumination applications.
Unlike conventional buck LED drivers, the TPS92510 can operate with fixed frequency either by utilising its internally generated clock or via synchronisation to an external PWM clock source. In multi-string implementations, the use of an external clock eliminates beat frequencies that may be visible in the lighting application, and simplifies EMI filter design.
Thermal foldback ensures some light output remains even in an LED over-temperature condition, which improves safety in the lighting environment.
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