Semtech Corp. launched its first 10-channel white LED driver SC442 in Ultra-Small, Low-Profile 4x4x0.6mm Package, with an integrated 3A boost power switch to satisfy space constrained LED backlights serving LCD monitors and LCD-TVs as well as ultra-bright displays.

The device can drive up to 120 LEDs at up to 30mA per channel and it operates across a wide input voltage range of 4.5V to 21V for use with lithium ion battery packs or regulated 5V, 12V or 18V power supplies.

The SC442 features up to 42V output for driving up to 12 white LEDs per channel. The device is compatible with boost or SEPIC  topologies. It also transitions seamlessly to bypass (or linear) mode; when the input voltage is greater than the output voltage. The synchronization feature eliminates inter-modulation noise found in backlight systems utilizing multiple driver ICs – such as those found in large LED backlit LCD-TVs. Other features include over-temperature, overload, open and programmable short LED protection.

Up to 50kHz PWM dimming eliminates audio noise problems. The optimum LED output voltage is maintained dynamically by the internal DC-DC current mode controller. Channels can also be independently disabled for smaller panel designs. Open LED and programmable shorted LED protection as well as over-temperature are provided. The controller switching frequency is programmed from 200kHz to 1MHz to optimize efficiency and L/C filter sizing.

It is packaged in an MLPQ-UT 28-pin package with exposed thermal pad for excellent heat sinking. The SC442 is Pb-free, halogen-free and fully RoHS compliant.