SAWX4A0X SEOUL | Alldatasheet
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Technical content
Features
Applications
The Acriche series of devices are designed for ease of implementation and readily connect to AC sources emitting very high flux while minimizing driver requirements. Acriche products are long-lasting, environmentally friendly semiconductor light sources that can be attached either directly to AC voltages, or as with the A4, to a simple diode bridge (see Fig 6). Acriche’s thermal management exceeds other power LED solutions incorporating state-of-the-art SMD technology, thermal path design, and low thermal resistant materials. Whether designing a spot light or tiled array, the Acriche A4 isan ideal light source for general purpose illumination applications. This application note provides assembly and handling informationof the A4 series. Introduction SAWX4A0X Application Note: Designing with Acriche A4
APCPCWM_4828539:WP_0000001WP_0000001 APCPCWM_4828539:WP_0000001WP_0000001 Z-Power LED X10490Z-Power LED X10490 Technical Data Sheet 서식번호 : SSC-QP-7-07-25 (Rev.00) Rev. 00 Rev. 00 SeptemberSeptember 20112011 www.acriche.com www.acriche.com
Contents
- Component 2. Driver Configurations 3. Protection
1.1 Description
covering the LED chip helps to extract the light and provide environmental protection.
1.2 Mechanical Dimensions
As seen in Fig 2 below, the theoretical optical center is located at the center of the A4 package. safety considerations should be taken into account by following UL Recommendations. The A4 has been UL recognized. Figure 1. ACRICHE A4 (left) and bottom of A4 (right) Figure 2. ACRICHE A4 mechanical dimensions(mm)
1.3 PCB solder pad layout
1.4 Junction Temperature
theoretically calculated by using the thermal resistance betweenthe LED junction and the board. The equation for Tj is: Tj[℃] = Tb[℃] + RΘ j-b[℃/W] x emitter power[W]. P[W] = Input Vrms[V] X Input Irms[A] X Power Factor – Irms2[A] X Resistor Value[Ω]. Figure 3. Recommended PCB solder pad layout Figure 4. Incorrect soldering of the ACRICHE A4 emitter Solder balls if excess solder paste is used. Figure 5. Thermal modeling of the ACRICHE A4 emitter
APCPCWM_4828539:WP_0000001WP_0000001 APCPCWM_4828539:WP_0000001WP_0000001 Z-Power LED X10490Z-Power LED X10490 Technical Data Sheet 서식번호 : SSC-QP-7-07-25 (Rev.00) Rev. 00 Rev. 00 SeptemberSeptember 20112011 www.acriche.com www.acriche.com
1.5 Lens handling
Improper handling of the LED packages can damage the silicone lens. Avoid touching the silicone dome of the LED especially with sharp tools. Pick up the LED onthe sides of the package. Any physical force to the silicone lens in excess of 3000gf will permanently and fatally damage the part. The silicone dome is sensitive to dust and debris and can cause an optical output decrease. If dust or debris accumulates on the lens, isopropyl alcohol (IPA) can be used to remove dust from the lens. 2. Driver Configurations
2.1 Description
The ACRICHE A4 emitter is designed to operate directly off of ACline power(e.g 120Vac, 230Vac) with a rectifier, resistors or optional capacitor(s). This compact circuit can minimize the lighting product size, help simplify thermal design, and increase overall product reliability. It is also an economical solution because you do not need to have all the extra components. Typical low voltage DC circuits require a transformer, regulator and multiple discrete components such as capacitors, inductors, resistors.
2.2 Proper resistor selection
Operating the ACRICHE A4 emitter requires a bridge rectifier andresistors at a minimum, since the architecture of the A4 has been modified from the earlier versions of the Acriche family(A2, A3), which did not need a bridge. This architecture has a string of LEDs in one direction only, compared to the previous version which has strings in both directions, thereby not requiring the diode bridge previously. Utilizing the new architecture, we areable to reduce the number of LEDs needed, thereby reducing package size and price. It is better to use higher than rated power resistors for reliability. The rated power of the resistor should be chosen based on the equation Irms(A)*Irms(A)*Resistor value(ohms). The normal power rating of a 3216 size resistor is 0.25W. If the power consumption in one resistor exceeds the rated power of the resistor it is suggested to use multiple resistors in parallel.
110 Vac
120 Vac
100 Vac
Figure 6. Compact drive circuit configuration 100~120Vac Table 1. Resistor values in Figure 6. (left) Table 2. Resistor values in Figure 6. (right) [1] SSC recommends that MS6B (Max input voltage: 420Vrms) wou ld be used as a bridge rectifier.
Figure 7. Standard compact drive circuit configuration 220~240Vac
240 Vac 1390 Ω1690 Ω1990 Ω2290 Ω25 mA,rms6 W
230 Vac 1030 Ω1330 Ω1630 Ω1930 Ω25 mA,rms6 W
220 Vac
Table 3. Resistor values in Figure 7.
2.3 Optional Components/Configurations
less flicker is needed. These optional configurations can lowerpower factor as seen in Table 13. The three different component configurations consist of a bridge diode, resistor, and capacitor(s). Figure 8. Current waveforms of different circuit configurations
Figure 9. Optional compact drive circuit configuration#1 Table 4. Resistor and capacitor values in Figure 9
230 Vac
Figure 10. Optional compact drive circuit configuration#2 Table 5. Resistor and capacitor values in Figure 10 (220Vac)
Table 6. Resistor and capacitor values in Figure 10 (230Vac)
Table 7. Resistor and capacitor values in Figure 10 (240Vac)
240 Vac
Table 8. Resistor and capacitor values in Figure 10 (100~120 Vac)
Figure 13. Optional compact drive circuit configuration#3 Table 9. Resistor and capacitor values in Figure 12 (220Vac) #1 & 2, higher efficiency and no flicker issues.
Table 10. Resistor and capacitor values in Figure 12 (230Vac)
Table 11. Resistor and capacitor values in Figure 12 (240Vac)
Table 12. Resistor and capacitor values in Figure 12 (100~120Vac)
2.4 Circuit configuration performance
merit from configuration#1 & 2. It has high efficiency, no flicker, but power factor is a little low. Table 13 shows detail circuit charateristic of four configurations that are operated in 230Vac/50Hz.
230 Vac230 Vac230 VacVin
50 Hz50 Hz50 HzFrequency
Table 13. Circuit characteristic of four configurations with input 230Vac/50Hz Figure 14. Four circuit configurations
2.5 Relative light output between AC and DC
The ACRICHE A4 emitter is binned at rectified AC 20mA,rms, not at constant current 20mA. by modifying the resistor value in the circuit. will have similar luminous flux characteristics. Figure 15. Relative luminous flux between AC and DC driving.
2.6 Vf bin combination
Figure 16. Same effect of Vf bin combination setting for Vf bin A and the resistor setting for Vf bin C, add them together and divide by 2. (1510ohms + 1210ohms) / 2 = 1360ohms, which is the same resistorvalue as Vf bin B. We can further expand this to other combinations of Vf if we modify Rout for setting the current. resistor values together and divide by 4 since we have 4 LEDs inseries. Figure 17. 120Vac resistor settings pulled from page 6
2.7 Color bin selection
have a color shift to the left. Each application is specific and should be verified in application. Figure 18. Color coordinate depends on board temperature for AN4240-03
3.1 Description
should be utilized to protect against over-voltage, over-current and over temperature conditions.
3.2 Lightning surges, Voltage spikes or Ring Wave Protection
tests according to IEEE C.62.41 can be used to simulate these real-life threats in the lab.
3.3 Over-current and Over-temperature Protection
both the light output and lifespan of the LED. LED, yet can automatically reset itself when the fault clears. An example circuit of a MOV and PPTC is shown in figure 19 below. Figure 19. Example protection circuit