Overview
Description
The iW337 is a secondary-side PWM signal generator that works with three types of dimming inputs: PWM dimming, 0V to 10V linear dimming, or simple dimming using a single resistor to ground from the DIM pin. The iW337 converts any of these three signals into a 1% to 100% PWM duty cycle that provides a dimming signal to a primary-side LED driver such as the iW3631, eliminating the need for transformers or other driver circuitry.
Features
- Operating range:15V to 60V
- 3-in-1 dimmer interface
- 0V to 10V analog
- PWM (10V)
- Resistor
- Highly integrated for low BOM cost
- Integrated current source for driving 0V to 10V dimmers
- Integrated optocoupler driver for isolated applications
- 1% to 100% PWM output
- 1% PWM duty cycle tolerance
- Selectable frequency range via external capacitor
- Shutdown pin to minimize standby power
Comparison
Applications
- 0V to 10V analog or PWM LED dimming
- Resistor LED dimming
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 648 KB | |
| Product Brief | PDF 427 KB | |
| Application Note | PDF 590 KB | |
| Other | ZIP 4.11 MB | |
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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.
Processing table
| SOIC-8 | Tape & Reel | 1 | ||
| SOIC-8 | Tape & Reel | 1 |
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