Make LED lighting more energy-efficient

Introduction: low energy consumption of the voltage converter is switched mode, according to the feedback circuit to control the switching cycle, to achieve stable output voltage.

The light emitting diode has the advantages of energy saving and safety, but because of the constant current operation, the energy consumption is relatively increased. The aforementioned constant current driver pressure drop within 2V, which is considered the design of low power consumption, if the voltage of the power supply end connected with light emitting diode drop more than 2V, it should be considered to achieve the goal of low energy consumption to voltage converter, but still maintain a constant current mode.

The low power consumption voltage converter operates in a switching mode, and the output voltage is controlled by the feedback circuit. However, in order to maintain the constant current operation state of the LEDs, the feedback circuit is used to control the switching period of the converter. T6322 is a step-down constant current LED driver, in accordance with its current external resistance, can support up to 1.5A of output current, provide + 5% precision current and high power efficiency (low energy consumption) and high power line adjustment ability.

Make LED lighting more energy-efficient

In the full LED lighting products market, the power input system of them into two categories: one is the current front control module AC power input system and the back-end, such products include freezing cabinet lights, indoor lighting, street lamp, desk lamp, MR16, AR111 etc.. Another type of AC power direct input system integrated AC/DC converter and constant current circuit, such products include E27 and GU10 bulb type LED lamp, PAR lamp, T5 and T8LED lamps, etc..

In addition to the design of the first type of power supply should be better than the front end of the constant voltage power supply, the back end of the constant power supply control module in accordance with the characteristics of its products using more efficient power supply design. The advantage is that the front end of the AC/DC power supply, such as switching power supply, DC adapter, such as constant voltage power supply, can be highly selective and secure authentication program, thereby reducing the design threshold.

Second types of power supply design by integrating AC/DC circuit and constant current circuit, it can meet the small space mechanism design, but from the power factor, power efficiency and safety considerations, the design also has some difficulty.

As a result, today's markets are rarely able to achieve high luminous efficiency, high power factor (>0.9) standards. At present, LED lighting products to achieve high luminous efficiency, and then become the next generation of the main light source, the primary consideration is the design of the power module, for different lamps and lanterns to choose the right design architecture. In addition, the power control IC must also improve the power efficiency, power factor, reliability, in order to develop suitable for LED lighting products.