Rohm have a new extremely compact, high-output linear single-chip LED driver IC that provides stable lighting even in case of line voltage drops, making it ideal for a broad range of socket-type LED lamps used in vehicle systems.
Conventional onboard LEDs support various designs and functions by combining numerous electronic components on a modular substrate. Socket-type LED lamps that can be replaced as easily as bulbs have been attracting attention by offering superior maintainability, but it is difficult to decrease socket size, and that difficulty constrains design flexibility.
In response, Rohm developed their BD18336NUF-M, just 3 × 3 × 1 mm. It has a current bypass function that prevents LED blinkout and maintains a brightness of at least 30% at all times by switching the LED current path, even when the battery voltage decreases from 13 to 9 volts.