Features
- Single-Stage DC/DC Non-Isolated Buck Regulator with Integrated Power MOSFET
- Supports Wide DC Input Voltage with Tight Output Current Regulation (±3%)
- Output Power up to 40W
- 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 Over-Voltage, Output Short, Over-Current, Peak Current Limit, Sense-Resistor Short Protection
- Input Voltage Under-Voltage and Over-Voltage Protection
- Built-In Over-Temperature Protection
- Thermally Efficient SO-10 Batwing Package
Description
The iW388 high-resolution integrated buck LED driver with Dialog’s 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. With an integrated 65V power MOSFET, the device offers a simple-to-use IC for applications up to 40W of output power. The iW388 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 a true 3-in-1 dimmer compatibility.
The iW388 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) | 40 |
| Switching Frequency (KHz) | 400 - 400 |
| Optimal VIN (V) | 0 - 65, 0.0 - 65 |
| Stages | Single-Stage |
| Dim Range (Min) (%) | 0.0625 |
| Dim Range (Max) (%) | 100 |
| Controller / Integrated | Integrated |
| Key Features | High-Resolution Second-Stage Buck, 0.0625% Dimming Resolution, DALI-2 Compliant, High-Resolution Second-Stage Buck, True DC Dimming, 0.0625% Dimming Resolution, DALI-2 Compliant, Integrated MOSFET |
| Protection Features | Input OVP, OCP, OSP, UVLO, OTP |
| Dimmer Functions Supported | Analog Dimming, PWM Dimming, 0-10V |
| Pass Device | FET (integrated) |
| LED Current Accuracy (%) | 3 |
Package Options
| Pkg. Type | Lead Count (#) | Pitch (mm) |
|---|---|---|
| SO-10 Batwing | 10 | 1.27 |
| SO-10 Batwing | 10 | — |
Applications
- Commercial Lighting:
- Wireless and Intelligent LED Lighting Systems
- DALI Lighting Systems
- 0-10V Dimming
- External Fixture Drivers