iW3614 thyristor dimming digital control 15WLED drive solution

High-performance offline power controller with thyristor dimming for LED lamps. It uses advanced digital control technology to detect the type and phase of the dimmer and can change the LED brightness by adjusting the dimmer conduction angle. The iW3614 uses PWM signals to control the LED brightness. Its unique digital control technology achieves flicker-free dimming. The iW3614 can be applied to all dimmer schemes, including: leading-edge dimmers, trailing-edge dimmers, and other dimmer types such as R-type, RC-type, or RL-type. In the no-dimmer state, the controller automatically detects the no-dimmer configuration. The iW3614 operates in quasi-resonant mode to improve efficiency. The iW3614 has many key protection functions built in. The iW3614 uses iWatt's advanced primary-side detection technology to achieve better line and load regulation even after removing the secondary feedback circuit. At the same time, due to the use of pulse-by-pulse waveform analysis, the iW3614 can provide precise constant current output control. The iW3614 can maintain stability under all operating conditions while removing loop compensation components. Therefore, the iW3614 can reduce the number of external components, simplify EMI design, and reduce the overall material cost.

iW3614 main features:

Suitable for isolated or non-isolated LED driver power supply with input 100V or 230V

Output power up to 15W

Meet the requirements of harmonics and high power factor (usually 0.94 without dimmer)

AC input frequency range: 45Hz~66Hz

Intelligent dimmer detection method

Leading-edge thyristor dimmer

Trailing Edge Dimmer

No dimmer status detection

Unsupported dimmer identification protection

Mixed mode dimming control, combining amplitude modulation and PWM pulse width modulation

Wide output dimming range: 1%~100%

Dimming and flicker-free control technology

Quasi-resonant switching mode, optimized conversion efficiency, up to 85%

Programmable over-temperature protection

Small size design

Low value input capacitor

Small size and low capacitance output capacitor

Small size power transformer

Primary side current detection technology, no need for optocoupler, simplifies circuit

High-precision constant current output: ±5%

Low startup current (10uA), low power consumption and fast startup

Low-capacitance output capacitors meet the requirements of hot-swap LED loads

Multiple protection functions:

LED load open circuit protection

Power system single point failure protection

LED over-current protection

LED short circuit protection

Current sampling resistor short circuit protection

Class-programmable over-temperature protection

iW3614 Applications:

Dimmable LED lamps

Suitable for 5W to 15W output power