The second generation high-voltage lamp with constant current chip SM500A6 is a single-channel LED linear constant current thermostat control chip. The chip uses our patented constant current setting and control technology. The output current is set by an external Rext resistor. The maximum current can reach 45mA. And the output current does not change with the voltage of the OUT port of the chip, and has good constant current performance. The system structure is simple, the peripheral components are few, and the solution cost is low.
The chip has an over-temperature regulation function. When the chip temperature reaches the over-temperature regulation point, the output current is rapidly reduced, which plays a constant temperature effect, protects the function of the IC, and improves application reliability.
The company's patented constant current control technology
OUT port output current is externally adjustable, the maximum current can reach 45mA
Inter-chip output current deviation <±4%
Chip surface temperature ≤ 60 ° C
With over temperature adjustment
Chip can share PCB board with LED
Simple line and low cost
Package form: SOT89-3
The larger n, the higher the system efficiency. During the system design process, adjust the operating voltage of the OUT port of the SM500A6 according to the application environment to optimize the η value.
?LED series quantity design
There are two aspects to consider when designing the number of LEDs connected in series:
1) OUT port voltage VOUT = Vin – n*VLED, in order to ensure the normal operation of the chip, it is necessary to ensure the OUT port voltage VOUT≥ VOUT_MIN;
2) The lower the OUT port voltage of the chip, the higher the system efficiency. Based on the above two points, the number of LEDs connected in series by the system is calculated as:
n =? VIN-VOUT
-----------
VLED
LED power chip SM500A6 cooling measures:
The SM500A6 chip has a temperature compensation circuit inside. In order to avoid the current leakage caused by high chip temperature, the system needs to have good heat dissipation treatment to ensure that the SM500A6 chip works in a reasonable temperature range. Common heat dissipation measures are as follows:
1) Increase the copper area of ​​the second generation high voltage lamp with constant current IC SM500A6 GND;
2) When the lamp is multi-chip parallel application, the second-generation high-voltage lamp with constant current ICSM500A chip spacing distance is increased, which can reduce temperature accumulation;
The LED power chip SM500A6 supports chip parallel application. If the output power of the system is too large and the chip temperature is high, multiple SM500A6 chips can be used in parallel.
Over temperature adjustment
When the LED temperature is too high, such as the high-voltage lamp with IC SM500A in the lamp strip application will cause the LED lamp with a yellow or oily rubber sleeve, affecting the life and aesthetics of the LED strip.
The SM500A6 integrates temperature compensation. When the chip reaches 60oC over temperature, the chip will automatically reduce the output current to reduce the temperature of the SM500A6 high voltage lamp with the chip, ensuring the life and aesthetics of the lamp with rubber sleeve.
Product application areas of SM500A6:
LED high pressure light strip
MR16
Other LED lighting applications
Elf Bar has been making an effort on innovative product via a smart heating system. As we discover the need for natural-based taste and more healthy ways of vaping are thriving year by year.
To get better tastes and to transfer a repeatable experience to our customers, the products have been obedient to the keyword of Elf Bar: Healthier and better. After thousands of experiments, we found methods of making our products the lowest harm materials, pure taste and delicate design, only to present you products that will surely meet your demand.
And it is very popular and hot selling so far in the world, like 800,1500,3000,4000 and 5000puffs models. the quality of elfbar Disposable Vape device is great.
Elf Bar Lux Series,Elf Bar Lux 1500 For Vaping,Elf Bar Lux 1500 Disposable Vape,Elf Bar Lux 1500 E-Cigarette Pod
Shenzhen Uscool Technology Co., Ltd , https://www.uscoolvape.com