1 Introduction
LED module with high brightness, high luminous efficiency, low cost, easy installation and other features widely used in plastic word, hair
Light and other advertising light source. Traditional LED backlight module commonly used DC12V / 24V power supply, 3/6 LED
Lamp beads plus a current limiting resistor program, the program is low cost, easy to produce, but there are obvious shortcomings:
A: Poor consistency of the module before and after the brightness
Due to the existence of a voltage drop on the wire, the front of the module is relatively bright, the latter gradually darken, although the power supply at both ends of the method can be improved, but the use of both ends of the power supply method will appear at both ends of the middle of the dark phenomenon, And increase the difficulty of construction; especially in the case of large current module, the defect is more prominent.
B: can be connected to a small number of LED modules, short length,
Traditional resistance current limiting module generally in series length of about five meters, and then increase the number of modules need to increase the number of
Source interface; at the same time the difficulty of installation and construction also increased.
C: LED module was ordered to be short
LED module generally work in a sealed environment, cooling difficulties, high working temperature, LED is a current-driven components, and LED VF decreases with the temperature rise, resulting in current limiting resistor voltage rise, the module work The current will increase with the temperature rise, so the temperature will accelerate the LED aging, reduce the LED module life. With the development of technology, LED modules continue to move toward higher brightness and higher current, high current and 24V power supply module market share continues to increase, but in the case of high current and high voltage, resistance current limiting way LED mold Group of the above shortcomings will be more significant.
2 advantage of using NU510
NU510 is a very suitable for LED module applications, low-dropout linear constant current IC, using NU510
The development of the module has the following outstanding advantages:
A, the brightness is highly consistent
With NU510 can ensure that the module between the chip current deviation <± 3%, even in a certain pressure drop range, LED operating current is constant, so the LED module before and after the brightness of the same height.
B: can extend the number of LED modules in series, the installation more convenient
C: can extend the module life
LED module with constant current IC program, LED work in the constant current state, so even if the temperature increases, LED operating current is always constant, there will be no accelerated aging to reduce the life of the problem. When abnormal overheating occurs, the constant current IC also has overheat protection, automatic PWM dimming of the output, reduce the temperature.
3 Taiwan number NU510 function brief
· NU510 is a low differential linear linear constant current driver chip to provide a single channel constant output current, the current output range of 10 ~ 160mA, the current value can be set by an external resistor, 1.6 ~ 16V wide power supply design, , Single output channels, can be used in parallel.
· Easy to drive medium and low power LEDs, using a resistor to control the output current value. (Current output specifications: 10 ~ 160mA)
Low channel cross voltage to improve system efficiency and reduce production costs.
Support high-speed power supply PWM dimming applications.
Support cascade applications to withstand higher voltage fluctuations.
Built-in overheat protection.
NU510 linear constant current IC advantages:
1: Minimum starting voltage (0.4V)
2: current accuracy + -3%.
3: Can set current / fixed current <150MA
4: Characteristic protection function 160 Temperature current is reduced by 50%.
5: encapsulated SOT23-6 / SOP8 / MSOP8.
6: Features, external set leakage protection.
NU510 package SOT23-6 package, SOP-8 package in two forms, the user can choose according to the actual situation, usually 60mA below the SOT23-6 package, 60-150mA using SOP-8 package.
LED module with high brightness, high luminous efficiency, low cost, easy installation and other features widely used in plastic word, hair
Light and other advertising light source. Traditional LED backlight module commonly used DC12V / 24V power supply, 3/6 LED
Lamp beads plus a current limiting resistor program, the program is low cost, easy to produce, but there are obvious shortcomings:
A: Poor consistency of the module before and after the brightness
Due to the existence of a voltage drop on the wire, the front of the module is relatively bright, the latter gradually darken, although the power supply at both ends of the method can be improved, but the use of both ends of the power supply method will appear at both ends of the middle of the dark phenomenon, And increase the difficulty of construction; especially in the case of large current module, the defect is more prominent.
B: can be connected to a small number of LED modules, short length,
Traditional resistance current limiting module generally in series length of about five meters, and then increase the number of modules need to increase the number of
Source interface; at the same time the difficulty of installation and construction also increased.
C: LED module was ordered to be short
LED module generally work in a sealed environment, cooling difficulties, high working temperature, LED is a current-driven components, and LED VF decreases with the temperature rise, resulting in current limiting resistor voltage rise, the module work The current will increase with the temperature rise, so the temperature will accelerate the LED aging, reduce the LED module life. With the development of technology, LED modules continue to move toward higher brightness and higher current, high current and 24V power supply module market share continues to increase, but in the case of high current and high voltage, resistance current limiting way LED mold Group of the above shortcomings will be more significant.
2 advantage of using NU510
NU510 is a very suitable for LED module applications, low-dropout linear constant current IC, using NU510
The development of the module has the following outstanding advantages:
A, the brightness is highly consistent
With NU510 can ensure that the module between the chip current deviation <± 3%, even in a certain pressure drop range, LED operating current is constant, so the LED module before and after the brightness of the same height.
B: can extend the number of LED modules in series, the installation more convenient
C: can extend the module life
LED module with constant current IC program, LED work in the constant current state, so even if the temperature increases, LED operating current is always constant, there will be no accelerated aging to reduce the life of the problem. When abnormal overheating occurs, the constant current IC also has overheat protection, automatic PWM dimming of the output, reduce the temperature.
3 Taiwan number NU510 function brief
· NU510 is a low differential linear linear constant current driver chip to provide a single channel constant output current, the current output range of 10 ~ 160mA, the current value can be set by an external resistor, 1.6 ~ 16V wide power supply design, , Single output channels, can be used in parallel.
· Easy to drive medium and low power LEDs, using a resistor to control the output current value. (Current output specifications: 10 ~ 160mA)
Low channel cross voltage to improve system efficiency and reduce production costs.
Support high-speed power supply PWM dimming applications.
Support cascade applications to withstand higher voltage fluctuations.
Built-in overheat protection.
NU510 linear constant current IC advantages:
1: Minimum starting voltage (0.4V)
2: current accuracy + -3%.
3: Can set current / fixed current <150MA
4: Characteristic protection function 160 Temperature current is reduced by 50%.
5: encapsulated SOT23-6 / SOP8 / MSOP8.
6: Features, external set leakage protection.
NU510 package SOT23-6 package, SOP-8 package in two forms, the user can choose according to the actual situation, usually 60mA below the SOT23-6 package, 60-150mA using SOP-8 package.
A PROFESSIONAL MANUFACTURER OF LED PRODUCTS
We are a Professional OEM/ODM Manufacturer of LED Products，more details information please visit our homepage:www.realgreenled.com or email to :sales@realgreenled.com .
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