According to the characteristics of the electricity grid, led characteristics requirements and related LED products, LED driver power to consider the following points:

General principles

 

a, according to the LED current and voltage characteristics, the ideal is to use a constant current driver. It can avoid the LED forward voltage change caused by the current changes, LED spot light a constant current at the same time so that the LED brightness stability.

 

b, In addition, LED luminous flux and inversely proportional to the temperature, so use should minimize power heating and cooling system design. Thereby reducing the working temperature of the LED.

 

c, in order to ensure the overall life of the LED must be LED thermostat control in a certain range.

 

A high reliability

 

LED products are mainly LED chips and power, cooling, housing, control circuit and other components. LED power supply a direct impact on the quality of products. LED street lamp products installed at high altitude, maintenance inconvenient, expensive maintenance.

 

2 high efficiency

 

LED energy-saving products, and drive energy-saving power supply should meet the requirements. In particular, the structure of power installed in the fixture, Floodlight Philips is particularly important. LED luminous efficiency LED temperature rise and decline. Power, high efficiency, small power depletion, heat small fixture lamps will reduce the temperature rise. Can delay benefit of LED light failure.

 

3 constant current drive mode

 

In order to meet the VI characteristics of LED, LED constant current driver power supply must be used.

 

4 Surge Protection

 

LED relatively poor impact resistance, so to enhance this protection. In particular, some outdoors products, due to the start of the grid load and Ray. Therefore, LED driving power supply to have inhibitory surge intrusion, and the ability to protect the LED without being damaged.

 

5 temperature protection function

 

Power in addition to conventional protection function, Candle Light Bulb the best increase in the constant current output LED chip temperature negative feedback to prevent the temperature of the LED chip PN Festival.

 

6 LED power life

 

Life matching and the life of the drive power of the best effort and the LED chip.

 

7 work environment

 

The various parts of the environment different to be focused on to consider LED lamps the workplace environment such as: temperature, humidity, installation location.

 

Take into account the power of work, if not the soft-start circuit energized the moment, the output will be a voltage spike. Plus the soft-start circuit, so it is necessary for the better protection of LED. That it is a key factor driving power stability.