Second-Stage Buck LED Driver with Exceptional Deep Dimming Performance for Commercial Lighting Applications
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Overview
Description
The iW3637 high-voltage, second-stage buck LED driver provides constant current to LEDs directly from DC power supplies. It supports non-isolated buck and flyback converter topologies to post-regulate from a PFC AC/DC boost converter, minimizing low frequency output ripple current and eliminating virtually all flicker in the system, even down to 1%.
A wide range of DC input voltages simplifies design by enabling the use of just one second-stage driver across any commercial lighting product portfolio.
Features
- Single-Stage DC/DC Buck or Flyback Topology
- Supports Wide DC Input Voltage with Tight Output Current Regulation (±3%)
- Output Power up to 150W
- PrimAccurate™ Primary-Side Control for Excellent Output Current Regulation with No Direct Voltage and Current Feedback Components Needed
- Independent Maximum Load Current Setting Interface
- PWM Dimming
- Wide Dimming Range: 1% - 100%, with 1% Resolution
- Configurable Minimum Dimming Setting
- Dim-to-Off, 1%, 5% or 10%
- Fully Protected
- Output Overvoltage, Output Open, Output Short, Overcurrent, Peak Current Limit, Sense-Resistor Short Protections
- Input Voltage Undervoltage Protection
- Built-In Over-Temperature Protection or External NTC
- Brown-In and Brown-Out Protection
- Small SOIC 8-Lead Package
Applications
Applications
- Commercial Lighting:
- T8
- 0-10V Dimming
- External Fixture Drivers
- Wireless and Intelligent LED Lighting Systems
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Product Options
Processing table
| SOIC-8 | Tape & Reel | Get Samples, | |
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| SOIC-8 | Tape & Reel | Get Samples, | |
| SOIC-8 | Tape & Reel | Get Samples, | |
| SOIC-8 | Tape & Reel | Get Samples, |
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