Microcontrollers for LED Lighting Control

RL78/I1A – New Lighting ASSP! Makes the future of lighting a reality

Constant Current Control

• 64 MHz 16-bit PWM timers generate up to 6 outputs
• 11 channels of ADCs interlocked with PWM timers
• Fast PI Processing in HW with integrated MAC
• Integrated Dithering function allows 0.97 nS resolution
• Integrated soft-start function

Survival Capabilities

• Over-current Protection Integrated 6 channel analogue comparators interlocked with PWM timers for immediate HW reaction
• Thermal Management Integrated temperature sensor
• High Temperatures Support Guaranteed operation at up to 125°

PFC Control

• Critical Conduction Mode
• Continuous Conduction Mode
• Discontinuous Conduction Mode
• Digital Interleaved PFC control supported

Fine Dimming

6 channels of integrated 16-bit timers internally ANDed with PWM outputs to provide individual 16-bit dimming for each LED channel

Extended DALI

• Selectable 16, 17, 24 bit frames of DALI communications supported on chip.
• DMX512 and RDM also supported

LED Control Demonstration Kit

The RL78/I1A DC/DC LED control demonstration kit enables system designers to experience the benefits of MCU-based solutions for LED driver development. They can also learn about LED constant current control and various methods of dimming using the lighting-specific RL78/I1A MCUs. The board implements a programmable 3-channel LED constant 350 mA current control in buck converter topology.

An important feature of the kit is the new version of a very comprehensive and easy-to-use software GUI tool, called the Applilet EZ for HCD. The Applilet EZ for HCD enables very easy graphical configuration of an LED lighting system while also generating pre-compiled C code for the RL78/I1A MCUs. It enables system designers to program the target device using only a USB cable. Using the Applilet EZ for HCD software tool, they can generate communication protocol stacks for DALI and DMX512 in seconds.

LED Control Demonstration KitLED Control Demonstration Kit

RL78-I1A reference board