Renesas Electronics iW380 High-Resolution Buck LED Drivers

Renesas Electronics iW380 High-Resolution Buck LED Drivers feature accurate DC dimming technology, enabling high-performance dimmable commercial lighting systems. These drivers work as stand-alone DC/DC converters or second-stage converters in an AC/DC lighting system. The iW380 high-resolution buck LED drivers accept PWM dimming inputs and analog (DC) to provide an exceptional dimming range. This dimming is offered with an integrated light-off mode ranging from 0.0625% to 100% in 0.0625% steps. The iW380 high-resolution buck LED drivers also work with resistors by dimming the input, offering 3-in-1 dimmer compatibility. These drivers support non-isolated buck converter topology by eliminating virtually all flicker in the system down to 1% and minimizing the low-frequency output ripple current.

The iW380 high-resolution buck LED drivers feature a small SOIC 10-Lead package, single-stage DC/DC non-isolated buck controller, and high- performance dimming. These drivers are ideally used in DALI lighting systems, external fixture drivers, and wireless and intelligent LED lighting systems.

Features

  • Single-stage DC/DC non-isolated buck controller
  • Supports wide DC input voltage with tight output current regulation (±3%)
  • Light-off mode – completely turn off LED light at minimum dimming input
  • Supports Constant Current (CC), Constant Voltage (CV), and Constant Power (CP) operating modes
  • Small SOIC 10-lead package
  • Fully protected:
    • Output overvoltage, output short, overcurrent, peak current limit, sense-resistor short protection
    • Input voltage, undervoltage and overvoltage protection
    • Built-in over-temperature protection
  • Two DIM pins – support PWM/analog inputs and RSET input:
    • RSET + 0V to 10V
    • MCU (DALI or Wireless) 0V to 10V
  • Auto-dimming signal type detection
  • Configurable dimming signal hysteresis
  • Configurable startup voltage
  • Over temperature current de-rating

Applications

  • Wireless and intelligent LED lighting systems
  • DALI lighting systems
  • External fixture drivers
  • Voice-controlled clotheshorse with connectivity
  • Voice-activated DALI lighting controls

Block Diagram

Block Diagram - Renesas Electronics iW380 High-Resolution Buck LED Drivers

Typical Application Diagram

Application Circuit Diagram - Renesas Electronics iW380 High-Resolution Buck LED Drivers

Renesas Electronics iW380 High-Resolution Buck LED Drivers