Furthermore, it features an integrated interface for digital PWM dimming for SSL wireless applications.
The iW3630 design allows for a 30% to 40% savings in the bill of materials (BOM) cost compared to competitive solutions for 0V to 10V applications and, unlike alternative solutions, maintains a very high power factor (PF) even at outputs as low as 20% of maximum load. It also offers low total harmonic distortion (THD).
An integrated driver in the isolation transformer works directly with 0V to 10V dimming systems, eliminating the need for external components such as drivers and expensive microcontrollers, while the digital PWM interface simplifies integration into wireless lighting systems.
In both commercial and wireless applications, integrated over-the-top (OTP) protection with derating means there is no need for additional heat management components. Furthermore, iWatt's patented PrimAccurate™ primary-side control technology eliminates the need for a secondary-side regulator and isolated optical feedback, while EZ-EMI® technology simplifies electromagnetic interference (EMI) filtering to further reduce the number of external components. This combination of integrated features results in a typical bill of materials (BOM) of fewer than 70 components when using the IW3630, compared to more than 100 components typically used by conventional SSL LED drivers. It also reduces the overall size of the solution and increases reliability.
The iW3630's digital control architecture simplifies ballast driver design by adapting to a wide range of input and output conditions. This allows for configurations that support varying LED strip lengths to cover the full output power range. An analysis conducted by iWatt on a sample lighting ballast implemented using the iW3630 showed that nine ballasts could be replaced with only three, thus reducing the number of models required in production.
The iW3630 uses iWatt's Flickerless technology to eliminate flicker across the entire 1% to 100% dimming range, while maintaining precise ±5% LED current regulation. Flickerless technology incorporates a power factor correction (PFC) circuit consisting of a chopper circuit. This circuit ensures a high power factor and virtually eliminates the frequency component of the input mains voltage.
The iW3630's integrated self-reducing thermal protection monitors the temperature inside the ballast. When thermal conditions reach the level set by the designer, the iW3630 LED driver automatically reduces the current supplied to the LEDs, decreasing heat dissipation and lowering the system temperature. This prevents the risk of sudden thermal spikes, ensuring that the maximum specified temperature for the lighting system's electrolytic capacitors is not exceeded, and enabling a predictable lifespan. Additional features include LED open/short circuit detection, input over-voltage protection, output over-current protection, and protection of the resistor that functions as the main current sensor on the primary side.
Features
• Output Power: 3W to 45W
• Integrated 0-10V dimming interface, no driver circuit or MCU required
• Digital PWM interface eliminates auxiliary power supplies in wireless lighting systems
• Wide dimming range: 1% – 100%
• Flickerless technology eliminates LED flicker across the entire dimming range
• Power factor > 0.95
• Total harmonic distortion (THD) < 15%
• High efficiency > 85% (typical)
• Integrated self-reducing LED thermal protection
