LED has many advantages such as environmental protection, long life and high photoelectric efficiency. In recent years, its application in various industries has been rapidly developed. The LED drive circuit has become a key factor in product application. In theory, the service life of LEDs is more than 100,000 hours. However, in the actual application process, LEDs are easily damaged due to improper selection of drive circuit design and driving methods.
When designing the LED driver circuit, it is necessary to know the LED current and voltage characteristics. Due to the different LED manufacturers and LED specifications, the current and voltage characteristics are different. Taking the typical specification of white LED as an example, according to the current and voltage variation rules of LED, the general application forward voltage is about 3.0-3.6V, the typical value is 3.3V, the current is 20mA, and the forward voltage of the LED exceeds 3.6. After V, the forward voltage has only a small increase, but its forward current may increase exponentially, causing the temperature of the LED illuminator to rise too fast, thereby accelerating the LED light attenuation, shortening the life of the LED, and even burning when severe. Bad LED. According to the voltage and current variation characteristics of the LED, strict requirements are imposed on the design of the driving circuit.
At present, many manufacturers produce LED light products (such as guardrails, lamp cups, and projection lamps), which use a RC capacitor, and then add a Zener diode to supply power to the LED. This way, the LED is simple and cheap, but there is a pole. Large defects, first of all, are inefficient, consume a lot of power on the buck resistor, and may even exceed the power consumed by the LED, and cannot provide a large current drive, because the larger the current, the larger the buck capacitor is required, so the consumption is lower. The greater the electrical energy on the voltage resistor. Secondly, the ability to stabilize the voltage is extremely poor, and it cannot be guaranteed that the LED current does not exceed its normal working requirements. When designing the product, the voltage across the LED is used to drive the power supply, which is at the cost of reducing the brightness of the LED. When the LED is driven by the RC mode, the brightness of the LED cannot be stabilized. When the voltage of the power supply is reduced, the brightness of the LED becomes dark. When the voltage of the power supply increases, the brightness of the LED becomes brighter.
According to the LED current and voltage variation characteristics, it is feasible to drive the LED with constant voltage. Although the commonly used voltage regulator circuit has the disadvantages of insufficient voltage regulation accuracy and poor current flow capability, it may be designed accurately in some products. The advantage is still that other driving methods cannot be replaced.
The constant current driving method is an ideal LED driving method, which can avoid the current fluctuation caused by the change of the LED forward voltage, and the constant current stabilizes the brightness of the LED. Therefore, many manufacturers choose constant current to drive LEDs. There is also a kind of LED driving method that is feasible. It does not have constant voltage or constant current. However, through the design of the circuit, when the forward voltage of the LED rises, the driving current is reduced, which ensures the safety of the LED product . Of course, the rise of the forward voltage can only be in the range of the LED, and too high will damage the LED.
The ideal LED driving method is to use a constant voltage, constant current, and cascade multiple LEDs in series. But the cost of the drive increases. In fact, each type of driving method has advantages and disadvantages. According to the requirements and application of LED products, the LED driving method is reasonably selected, and the precise design of the driving power supply becomes the key.
Smart solar outdoor light with both lighting and RGB colorful lighting, can be charged with USB and solar panel. Once it has sunlight, the solar panel can be automatically charged , the charging way is very environmentally friendly. We added a USB charging way so that it can be quickly charged via the USB cable in cloudy day or rainy day.
The outdoor light is solar-sensing, it will automatically turns off when in the bright enviroment, then begin to charge by solar. When the night comes, it will automatically turn on in the dark. Waterproof IP65 makes users no need to worry when using in the rainy day.
Equipped with a detachable plastic sticker, it can be used to decorate the lawn, garden, beach... After removing the plastic sticker, it can be placed on the table as an ambient light. They will be stars fall into your garden, twinkle in the dark and go off in the day. Automatic cycle colorful mode makes parties begin at anytime and anywhere.
Our LED products can meet global quality standards and pass European testing by TUV Rheinland. Bulbs have certifications such as EMC, RED, LVD, ROHS, REACH, ERP and FCC.
With the exclusive designed 2.4G remote controller, get you off the switch and turn on / off the lights anywhere, one remote controller can set 4 groups, each group is recommended to match up 8pcs bulbs, one remote controller can max control 32 bulbs. This remote controller is suitable for all 2.4G versions of RGBW products under [linkuphome".
The remote control uses colorful touch buttons, the color touch buttons are comfortable and sensitive. The remote controller has the functions of grouping, lighting, brightness adjustment, color light automatic cycle mode, three cycle speeds can be choosed. The wireless control distance is around 20 meters. Low power consumption makes the remote controller only need 4pcs AA batteries, but can be used for two years.
Description: RGB Outdoor Solar Lamp with 2.4G Control
Product Model No. C2
Product dimension: 155mm *165mm
Material: ABS+PC
Lamp Color: 8pcs RGB lamp beads+4pcs Warm White lamp beads
Lamp Current: 15-20mA
Power: 0.5W (15LM)
Battery Capacity: 1000mA (Li battery included)
Battery Voltage: 3.7V
Battery Duration: 9h(by USB charge for 1.5h) , 5h(by solar panel for whole sunny day)
Solar Panel: Monocrystalline silicon
Solar Panel Voltage: 6V
Solar Panel Output: 130mA
Waterproof Level: IP65
Control Qty: 1-32pcs
Packing: color box
Warranty: 1 Year
Charge Mode: Solar Panel and USB
Control Distance: 20m
Color box size: 22.2*20.6*5cm
G.W. of Unit: 0.55kg
N.W. of Unit: 0.34kg
Certification: CE(EMC,RED) ROHS,IP65,FCC
Description: 2.4GRF Wireless RGB Remote Controller
Product Model No.: R1
Product dimension: 105mm *33mm,
Product Net Weight: 150g
Material: ABS
Battery: 4*AA Battery (not included)
Working Voltage: 6V
Standby Power: 3 mW
Frequency Band: 2400-2483.5MHz/2.4GHz
Control Distance: 20m
Control bulb qty: 1-32 pcs
Packing: color box
Warranty: 1 Year
Color box size: 16.7*14.7*4.5cm
G.W. of Unit: 0.22kg
N.W. of Unit: 0.15kg
Outdoor Lamp With Remote Control
Outdoor Lamp With Remote Control,Remote Control Outdoor Lamp,Waterproof Outdoor Lamp,Remote Control Outdoor Colorful Lamp
Ningbo Homey Photoelectric Technology. Co., Ltd , https://www.linkuphome.com