概览
描述
The iW339 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 iW339 converts any of these three signals into a 1% to 100% PWM duty cycle output that provides a dimming signal to a primary-side LED driver such as the iW3636, eliminating the need for transformers or other driver circuitry.
特性
- 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% PWM duty cycle tolerance
- Selectable frequency range via external capacitor
- Shutdown pin to minimize standby power
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