Linear Technology Offers DC/DC Umodule LED Drivers

Linear Technology has introduced two DC/DC Umodule LED drivers for strings of up to eight white LEDs or nine red LEDs. The LTM8042 and the LTM8042-1 are capable of operating as boost, buck or buck-boost devices with a 3-30V input voltage range. Each device is a complete LED driver solution in a 9 x 15 x 2.8mm land grid array (LGA) package. The LTM8042 and the LTM8042-1 feature 0.5 per cent output current line regulation accuracy and can withstand up to 40V input transients.

The LTM8042 sources up to 1A of current, whereas the LTM8042-1 sources up to 350mA. It achieves True Color PWM dimming with 3,000:1 ratio or analogue dimming with 10:1 ratio. The compact solution permits a quick design to fabrication of LED string driver circuits in applications such as industrial illumination, backlight displays, scanners and automotive as well as avionics lighting.

The LTM8042 and the LTM8042-1 are switching regulator LED drivers with very accurate output current line regulation, suitable for driving LEDs or for general-purpose current sourcing. Inductors, capacitors, regulator ICs and compensation circuitry are enclosed and protected in a plastic package resembling an IC. These devices are pin compatible with each other.

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