Description

This article provides information about the AP1694A Triac Dimmable GU10 12V/400mA Buck LEDs driver EV board that uses a tapped transformer to increase power conversion turn on duty cycle, which in turn boosts current back to LED during the ratio of tapped winding. The article also mentions about the benefits of using bigger gauge wire and larger inductance, which can reduce switching current and the forward drop while reducing the power consumption on the diodes.

Specifications and features

• Typical 3% to 95% Dimming performance (Depends on dimmer brands)
• Boundary conductive switching mode
• Simple adjustable Constant Current
• Inductor Short Protection
• Low BOM cost
• PFC >0.9 & low THD.
• 200 ~265VAC input range
• >77% Efficiency
• With open, short, and wrong polarity LED protection

Application Scenarios

The AP1694A Triac Dimmable GU10 12V/400mA Buck LEDs driver EV board is ideal for:

• GU10 LED Offline small size bulb
• Candle size LED lamp
• Desktop lamps
• Under the counter lamps

Comparison

• Boundary conductive switching mode provides better efficiency.
• Simple adjustable constant current makes it easier to control the LED's performance.
• Inductor short protection feature provides extra safety for the power supply.
• Open, short, and wrong polarity LED protection helps to avoid any potential damage to the LEDs.

• Dependence on specific dimmer brands may limit compatibility with some systems.