Reporter: Yang Qiu Ni Editor: Yu Zhantao
The drive circuit is an important part of LED application products, and its technology maturity is gradually increasing with the expansion of the LED market. Whether in lighting, backlight or display panels, a number of mature products have emerged. However, with the further development of LED applications, the industry has put forward higher requirements for drive solutions, and also brings huge opportunities and challenges to the LED drive industry. How do we view the technology trends of LED drivers? How to interpret the current difficulties and hot spots? Where is the market direction? Faced with various questions, Optoelectronics News produced the "LED driver IC driving LED to popularization" news topic, comprehensive analysis of existing technical solutions, interviewing well-known experts in the industry, exploring the development trend of the industry, and striving for the LED industry The status quo and future trends are reported in all directions. The following is the view of Jiang Jialiang, Marketing Manager of Power Management Department of Asia Pacific.
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Jiang Jialiang, Marketing Manager, Power Management Department, Asia Pacific, ON Semiconductor
Optoelectronics News: Please briefly introduce the layout of the LED driver series of ON Semiconductor. What are their advantages and characteristics?
Jiang Jialiang: LEDs are essentially low-voltage devices. Depending on the color and current, the forward voltage may vary between 2 V and 4.5 V. LEDs need to be driven with constant current to ensure the required brightness and color. As the world's leading supplier of high performance, energy efficient silicon solutions, ON Semiconductor's power supply is portable battery, AC offline power supply, automotive or low voltage AC or DC power supply, providing a suitable drive solution covering 1 W to Hundreds of watts of power, covering a wide range of applications such as LCD backlighting, building landscape lighting, residential lighting, retail, automotive and street lighting. These LED driver solutions from ON Semiconductor not only meet the needs of related applications, but also provide high energy efficiency, support the latest trends in energy saving and environmental protection, and are highly regarded by customers.
Specifically, ON Semiconductor's LED driver family includes the following products:
1) LED applications powered by AC offline power:
a) G13/GU10/PAR16/PAR20 LED lighting applications in the 1 W to 8 W power range: NCP1015 self-powered monolithic switching regulators;
b) PAR30/PAR38 LED lighting applications with 8 W to 25 W power range without power factor (PF) requirements: NCP1028 Enhanced Monolithic Switching Regulator or NCP1351 Fixed On-Time Variable Off-Time PWM Controller;
c) 8 W to 25 W PAR30/PAR38 LED lighting applications with power factor requirements: NCP1607 or NCP1608 cost-effective critical conduction mode (CrM) PFC controller;
d) LED area lighting applications in the 50 W to 150 W or 100 W to 200 W power range: improved single-stage PFC controller NCP1652, critical conduction mode PFC controller NCP1607/NCP1608 + resonant current mode PWM controller NCP1377, critically conductive Mode PFC controller NCP1607/NCP1608+ high-performance half-bridge dual inductor plus single capacitor (HB LLC) PWM controller NCP1396.
2) LED applications powered by a wide input range DC-DC power supply:
a) 1 W to 3 W MR11/MR16 buck LED bulb application: CAT4201 buck LED driver;
b) 1 W to 20 W boost LED driver: NCP3065/NCP3066 or NCV3065/NCV3066 (automotive application version) multimode LED driver for buck, boost, single-ended primary inductor converter (SEPIC) and inverter;
c) 20 W to 60 W high power DC-DC boost LED driver: NCP1034 high voltage PWM controller
3) Battery-powered portable products LCD backlight and LED flashlight applications:
a) Inductive boost white LED driver for LCD backlight and camera flash (helium and LED) applications: NCP5005, NCP5010, NCP5080, etc.;
b) Charge pump white LED driver and RGB LED driver for LCD backlight and LED flash/flashlight applications: NCP5603, NCP5608, NCP5623, NCP1421, NCP1529, NCP5680, etc.;
c) AMOLED and PMOLED power supply ICs: NCP5810D, NCP1406, etc.
Optoelectronic News Network: What are the difficulties (or hot spots) of current LED lighting drivers?
Jiang Jialiang: In order to protect the advantages of LED lighting, LED drivers must be reliable, efficient, safe (can withstand a variety of fault conditions), low cost, and can be easily implemented. In addition, physical design is also very important in the design of LED luminaires, especially in terms of shape and adaptability. In addition, the heat dissipation capability of LED lamps is also very important, and it is necessary to handle heat dissipation well to ensure high reliability of LEDs and LED drivers. For different LED lighting applications, it is first necessary to select the appropriate drive circuit topology, such as the preferred flyback topology for medium and low power LED lighting applications with power less than 100 W, and to provide higher energy efficiency, resonant half bridge dual inductor plus single Capacitance (HB LLC) is the preferred topology. In addition, pay attention to the energy efficiency specification of the product target market. If necessary, consider power factor correction (PFC) to provide the appropriate LED driver solution. ON Semiconductor offers a variety of energy-efficient solutions to meet the needs of LED luminaire drive designs.
Optoelectronic News Network: What is the current competitive landscape of LED drivers at home and abroad? What is the market position of ON Semiconductor?
Jiang Jialiang: The LED driver market has a huge application space, and it is attracting more and more IC companies to enter the LED driver market. There are many leading suppliers such as ON Semiconductor and many Chinese local suppliers.
As the world's leading supplier of high-performance, energy-efficient silicon solutions, ON Semiconductor has a dominant position in the LED driver market. We use a wide range of technologies to provide solutions for a wide range of LED applications, leveraging the core strengths of energy-efficient power solutions. . At the same time, we also lead the market with innovative technologies and products. Like our recent simple, economical and rugged constant current linear regulator (CCR) NSI45xx series for low current LED driver applications, these devices are a new LED driver solution that is being patented by ON Semiconductor. Self-biased transistor (SBT) technology, combined with ON Semiconductor's superior process control capabilities, provides simpler, more economical than conventional linear regulators, and is much higher than current resistive drivers used in low current applications. Performance, fill the gap in the market, suitable for a variety of low-current applications such as car taillights, billboard text circuits, counter lighting. Another example is ON Semiconductor's NCP5680, the industry's first 10 A supercapacitor LED flash driver that provides excellent LED flash and power management solutions for ultra-thin camera phones and digital cameras. In addition, the newly launched CAT4106 is also a testimony. This device is a 6 W multi-channel step-up LED driver for larger LCD backlights that can drive up to 40 white LEDs - or a total of 4 strings, each with 10 LEDs and a voltage of 36 Volts (V) provides a total of 6 W of LED output power. The device also includes built-in diagnostics that automatically adjust the output voltage to drive the highest forward voltage (Vf) string with the lowest head room voltage, helping designers to maximize backlight efficiency and reduce board space.
Optoelectronic News Network: According to your personal understanding, what is the gap between LED drivers of domestic manufacturers and international companies?
Jiang Jialiang: In the Chinese market, cost guidance is obvious, product quality may be limited, so domestic manufacturers tend to provide low-cost design, even without considering safety standards. As far as international suppliers are concerned, they will be considered as a whole when designing, taking into account performance and safety factors, and their LED driver products provide high performance. But as a leading supplier of LED driver solutions, ON Semiconductor is able to balance in two directions, namely, offering good prices on the one hand and high performance on the other.
In addition, from the perspective of product richness, not many manufacturers can provide LED drivers suitable for different power supply, covering a wide range of power ranges and applications, such as leading suppliers such as ON Semiconductor, to meet different application needs of customers. At the same time, it can provide extremely high energy efficiency, high integration, rich security protection features, high reliability and innovation.
Optoelectronics News Network: There are many market segments in the three fields of LED-driven lighting, backlight, display, etc. Which markets do you prefer? why? What is the future product planning of ON Semiconductor?
Jiang Jialiang: So far, backlighting is still the most important application market for LED drivers, especially in applications such as notebook/netbook, cold cathode fluorescent lamp (CCFL) replacement and LCD display. However, with the emergence of cost-effective, ultra-high brightness, longer-life LEDs, combined with the advantages of providing rich color combination and energy saving, LED has ushered in rapid development in the general lighting market, and its development prospects are highly promising. In the future product planning direction, ON Semiconductor will further enrich our LED driver product lines with different power supply based on a deep understanding of customer applications and close cooperation with customer needs, providing high energy efficiency and supporting energy saving and environmental protection trends.
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The drive circuit is an important part of LED application products, and its technology maturity is gradually increasing with the expansion of the LED market. Whether in lighting, backlight or display panels, a number of mature products have emerged. However, with the further development of LED applications, the industry has put forward higher requirements for drive solutions, and also brings huge opportunities and challenges to the LED drive industry. How do we view the technology trends of LED drivers? How to interpret the current difficulties and hot spots? Where is the market direction? Faced with various questions, Optoelectronics News produced the "LED driver IC driving LED to popularization" news topic, comprehensive analysis of existing technical solutions, interviewing well-known experts in the industry, exploring the development trend of the industry, and striving for the LED industry The status quo and future trends are reported in all directions. The following is the view of Jiang Jialiang, Marketing Manager of Power Management Department of Asia Pacific.
Jiang Jialiang, Marketing Manager, Power Management Department, Asia Pacific, ON Semiconductor
Optoelectronics News: Please briefly introduce the layout of the LED driver series of ON Semiconductor. What are their advantages and characteristics?
Jiang Jialiang: LEDs are essentially low-voltage devices. Depending on the color and current, the forward voltage may vary between 2 V and 4.5 V. LEDs need to be driven with constant current to ensure the required brightness and color. As the world's leading supplier of high performance, energy efficient silicon solutions, ON Semiconductor's power supply is portable battery, AC offline power supply, automotive or low voltage AC or DC power supply, providing a suitable drive solution covering 1 W to Hundreds of watts of power, covering a wide range of applications such as LCD backlighting, building landscape lighting, residential lighting, retail, automotive and street lighting. These LED driver solutions from ON Semiconductor not only meet the needs of related applications, but also provide high energy efficiency, support the latest trends in energy saving and environmental protection, and are highly regarded by customers.
Specifically, ON Semiconductor's LED driver family includes the following products:
1) LED applications powered by AC offline power:
a) G13/GU10/PAR16/PAR20 LED lighting applications in the 1 W to 8 W power range: NCP1015 self-powered monolithic switching regulators;
b) PAR30/PAR38 LED lighting applications with 8 W to 25 W power range without power factor (PF) requirements: NCP1028 Enhanced Monolithic Switching Regulator or NCP1351 Fixed On-Time Variable Off-Time PWM Controller;
c) 8 W to 25 W PAR30/PAR38 LED lighting applications with power factor requirements: NCP1607 or NCP1608 cost-effective critical conduction mode (CrM) PFC controller;
d) LED area lighting applications in the 50 W to 150 W or 100 W to 200 W power range: improved single-stage PFC controller NCP1652, critical conduction mode PFC controller NCP1607/NCP1608 + resonant current mode PWM controller NCP1377, critically conductive Mode PFC controller NCP1607/NCP1608+ high-performance half-bridge dual inductor plus single capacitor (HB LLC) PWM controller NCP1396.
2) LED applications powered by a wide input range DC-DC power supply:
a) 1 W to 3 W MR11/MR16 buck LED bulb application: CAT4201 buck LED driver;
b) 1 W to 20 W boost LED driver: NCP3065/NCP3066 or NCV3065/NCV3066 (automotive application version) multimode LED driver for buck, boost, single-ended primary inductor converter (SEPIC) and inverter;
c) 20 W to 60 W high power DC-DC boost LED driver: NCP1034 high voltage PWM controller
3) Battery-powered portable products LCD backlight and LED flashlight applications:
a) Inductive boost white LED driver for LCD backlight and camera flash (helium and LED) applications: NCP5005, NCP5010, NCP5080, etc.;
b) Charge pump white LED driver and RGB LED driver for LCD backlight and LED flash/flashlight applications: NCP5603, NCP5608, NCP5623, NCP1421, NCP1529, NCP5680, etc.;
c) AMOLED and PMOLED power supply ICs: NCP5810D, NCP1406, etc.
Optoelectronic News Network: What are the difficulties (or hot spots) of current LED lighting drivers?
Jiang Jialiang: In order to protect the advantages of LED lighting, LED drivers must be reliable, efficient, safe (can withstand a variety of fault conditions), low cost, and can be easily implemented. In addition, physical design is also very important in the design of LED luminaires, especially in terms of shape and adaptability. In addition, the heat dissipation capability of LED lamps is also very important, and it is necessary to handle heat dissipation well to ensure high reliability of LEDs and LED drivers. For different LED lighting applications, it is first necessary to select the appropriate drive circuit topology, such as the preferred flyback topology for medium and low power LED lighting applications with power less than 100 W, and to provide higher energy efficiency, resonant half bridge dual inductor plus single Capacitance (HB LLC) is the preferred topology. In addition, pay attention to the energy efficiency specification of the product target market. If necessary, consider power factor correction (PFC) to provide the appropriate LED driver solution. ON Semiconductor offers a variety of energy-efficient solutions to meet the needs of LED luminaire drive designs.
Optoelectronic News Network: What is the current competitive landscape of LED drivers at home and abroad? What is the market position of ON Semiconductor?
Jiang Jialiang: The LED driver market has a huge application space, and it is attracting more and more IC companies to enter the LED driver market. There are many leading suppliers such as ON Semiconductor and many Chinese local suppliers.
As the world's leading supplier of high-performance, energy-efficient silicon solutions, ON Semiconductor has a dominant position in the LED driver market. We use a wide range of technologies to provide solutions for a wide range of LED applications, leveraging the core strengths of energy-efficient power solutions. . At the same time, we also lead the market with innovative technologies and products. Like our recent simple, economical and rugged constant current linear regulator (CCR) NSI45xx series for low current LED driver applications, these devices are a new LED driver solution that is being patented by ON Semiconductor. Self-biased transistor (SBT) technology, combined with ON Semiconductor's superior process control capabilities, provides simpler, more economical than conventional linear regulators, and is much higher than current resistive drivers used in low current applications. Performance, fill the gap in the market, suitable for a variety of low-current applications such as car taillights, billboard text circuits, counter lighting. Another example is ON Semiconductor's NCP5680, the industry's first 10 A supercapacitor LED flash driver that provides excellent LED flash and power management solutions for ultra-thin camera phones and digital cameras. In addition, the newly launched CAT4106 is also a testimony. This device is a 6 W multi-channel step-up LED driver for larger LCD backlights that can drive up to 40 white LEDs - or a total of 4 strings, each with 10 LEDs and a voltage of 36 Volts (V) provides a total of 6 W of LED output power. The device also includes built-in diagnostics that automatically adjust the output voltage to drive the highest forward voltage (Vf) string with the lowest head room voltage, helping designers to maximize backlight efficiency and reduce board space.
Optoelectronic News Network: According to your personal understanding, what is the gap between LED drivers of domestic manufacturers and international companies?
Jiang Jialiang: In the Chinese market, cost guidance is obvious, product quality may be limited, so domestic manufacturers tend to provide low-cost design, even without considering safety standards. As far as international suppliers are concerned, they will be considered as a whole when designing, taking into account performance and safety factors, and their LED driver products provide high performance. But as a leading supplier of LED driver solutions, ON Semiconductor is able to balance in two directions, namely, offering good prices on the one hand and high performance on the other.
In addition, from the perspective of product richness, not many manufacturers can provide LED drivers suitable for different power supply, covering a wide range of power ranges and applications, such as leading suppliers such as ON Semiconductor, to meet different application needs of customers. At the same time, it can provide extremely high energy efficiency, high integration, rich security protection features, high reliability and innovation.
Optoelectronics News Network: There are many market segments in the three fields of LED-driven lighting, backlight, display, etc. Which markets do you prefer? why? What is the future product planning of ON Semiconductor?
Jiang Jialiang: So far, backlighting is still the most important application market for LED drivers, especially in applications such as notebook/netbook, cold cathode fluorescent lamp (CCFL) replacement and LCD display. However, with the emergence of cost-effective, ultra-high brightness, longer-life LEDs, combined with the advantages of providing rich color combination and energy saving, LED has ushered in rapid development in the general lighting market, and its development prospects are highly promising. In the future product planning direction, ON Semiconductor will further enrich our LED driver product lines with different power supply based on a deep understanding of customer applications and close cooperation with customer needs, providing high energy efficiency and supporting energy saving and environmental protection trends.
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