Intelligent lighting, it was only after entering the Mi family that it could be so magical, so it was always wondering what it was. Let intelligent lighting become a reality. Only after entering the component industry did it know that such a complicated program is all in one piece. Small chip.
Smart lighting is a fashionable term, but only design engineers are aware of the challenges behind this. For smart lighting power supply systems, with ultra-low standby power consumption, to be able to adapt to a wide variety of loads, and to be incapable of distortion, the output Power supply needs to work all the time, right, but also support dimming.
This is a seemingly impossible task, but PI's new LYTSwitch-6 chip is very easy to get in. The IC provides 65W flicker-free output with up to 94% efficiency while providing support for two levels or a single Level PFC configuration option. Designed for residential and commercial lighting and thin ceiling recessed lamp applications, its fast dynamic response provides excellent cross-regulation for parallel LED string applications, eliminating the need for additional secondary regulation Circuit. In addition, it is easy to connect pulse width modulation (PWM) dimming interface.
The LYTSwitch-6 supports both constant voltage (CV) and constant current (CC) control. The advanced thermal turn-back protection prevents over-temperature conditions in the IC and maintains thermal stability under any elevated temperature and operating conditions Provide lighting in case.
To sum up, LYTSwitch-6 has six major characteristics:
± 3% constant voltage and constant current accuracy
Low no-load power consumption less than 15 mW (without PF correction circuit) - Meets North American DOE-6 and Energy Star requirements
Support analog and PWM dimming
Efficient
Response to fast control reduces output ripple
Excellent load regulation and excellent transient response
The following figure is a full-scale anatomy of LYTSwitch-6, from which you can see where these outstanding qualities come from.
In-depth interpretation of intelligent lighting LYTSwitch-6 chip
Among them, the most important is FluxLink technology, which is a kind of magneto-inductive coupling technology that crosses the isolation band to eliminate the disadvantages of the optocoupler, so that the LYTSwitch-6 can take advantages of the primary side control and the secondary side control Its unique control method can greatly reduce the ripple, synchronous rectifier allows the efficiency of the converter reached 94%, there are a variety of perfect protection mechanism to the system on a multi-layer insurance.
LYTSwitch-6 has a variety of innovative features, such as the use of semi-active PFC correction, to achieve a high efficiency and low ripple characteristics, so that the secondary regulator circuit can not show any output changes; using advanced frequency conversion switch The control mode makes the control loop response extremely fast and reduces the output ripple; it integrates 650V or 725V MOSFETs, supports 308VAC industrial voltage, and provides additional safety margin in unstable areas of the power grid. Currently the most popular DALI dimming, LYTSwitch-6 is also supported, can directly read out DALI output.
The LYTSwitch-6 is also available in two reference designs: the ER-657 and the DER-660. The DER-657 is a high PF and low output ripple with single LED and multi-string LED illumination. 80V, 580mA output, 45W open 85-264 VAC input range, up to 90% efficiency at 230VAC, saves heatsinks due to its high efficiency and uses only the PCB heatsink. The precise no-load voltage is suitable for the stable supply of wireless control modules in smart lighting The DER-660 supports digital addressable lighting interface (DALI) dimming, high voltage input range of 180-264 VAC, PF greater than 0.9 at 230VAC input with less than 20% total harmonic distortion, 36V 800mA, 29W output power, With a full load efficiency of up to 86%, the DER-660 achieves a 0.6% ripple ratio, with output current ripple of only 47mA vs. 800mA, achieving a flicker of less than 3%.
LYTSwitch-6 products are available in a variety of models to meet different application scenarios. LYTSwitch-6 LED driver ICs are available now and are priced at $0.84 each based on 10,000-unit order quantities.
In-depth interpretation of intelligent lighting LYTSwitch-6 chip