Features
- Single-Stage DC/DC Non-Isolated Buck Controller
- Supports Wide DC Input Voltage with Tight Output Current Regulation (±3%)
- Output Power up to 150W
- Wide Output Voltage Range Support – 5V to 98% of the Input Voltage
- High Performance Dimming
- 0.0625% Dimming Resolution
- 0.0625% to 100% Dimming Range
- True DC Dimming with No Ripple Across Entire Dimming Range
- Light-Off Mode - Completely Turn-Off LED Light at Minimum Dimming Input
- Two DIM Pins – Supports PWM/Analog Inputs and RSET Input
- RSET + 0-10V
- MCU (DALI or Wireless) + 0-10V
- Supports Constant Current (CC), Constant Voltage (CV), Constant Power (CP) Operating Modes
- 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
- Small SOIC 10-Lead Package
Description
The iW380 high-resolution buck LED driver with Renesas' True DC dimming technology enables high-performance dimmable commercial lighting systems. The device works from a 65V input voltage as a second-stage converter in an AC/DC lighting system or as a stand-alone DC/DC converter. The iW380 accepts both analog (DC) or PWM dimming inputs to provide an exceptional dimming range from 0.0625% to 100% in 0.0625% steps with an integrated light-off mode. The device also works with a resistor set dimming input to offer true 3-in-1 dimmer compatibility. The iW380 supports a non-isolated buck converter topology to post-regulate from an off-line AC/DC converter, minimizing low-frequency output ripple current and eliminating virtually all flicker in the system, even down to 1%.
Parameters
| Attributes | Value |
|---|---|
| Function | Dimmable |
| Output Power Max (W) | 150 |
| Switching Frequency (KHz) | 400 - 400, 400 - 600, 600 - 600 |
| Optimal VIN (V) | 78 |
| Stages | Single-Stage |
| Dim Range (Min) (%) | 0.0625 |
| Dim Range (Max) (%) | 100 |
| Controller / Integrated | Controller |
| Key Features | 0.0625% Dimming Resolution, DALI-2 Compliant, High-Resolution Second-Stage Buck, True DC Dimming, 0.0625% Dimming Resolution, DALI-2 Compliant, High-Resolution Second-Stage Buck, True DC Dimming, 0.0625% Dimming Resolution, DALI-2 Compliant, Optimized for Stage Lighting, Integrated MOSFET |
| Protection Features | Input OVP, OCP, OSP, OTP, Input OVP, OCP, OSP, UVLO, OTP |
| Dimmer Functions Supported | Analog Dimming, PWM Dimming, 0-10V |
| Pass Device | FET |
| LED Current Accuracy (%) | 3 |
Application Block Diagrams
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Additional Applications
- Commercial Lighting
- Wireless and Intelligent LED Lighting Systems
- DALI Lighting Systems
- 0-10V Dimming
- External Fixture Drivers
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iW339
How many iW339's can be connected to a single 100K potentiometer for dimming control?
Apr 10, 2024
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