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for the hb-led applications, hb-led constant current required to work under, buck converter is also considered only in the continuous conduction mode (continuous conduction mode) to run. inductor current has two states: state flow (sw1 closed) and stop status (sw1 open). in a flow state, the inductor current starts saight up, the maximum current change can use the following formula: where is the sw1 closed ton time. rl vout is the voltage on the device. similarly, in the stop state, the inductor current during the decline in the sw1 open, the maximum current change can use the following formula: where is toff sw1 to open. that the diode voltage vd. assuming toff ton and switching time is the sum of the total length of t, then ton also can be calculated as: where d is the closing time of the duty cycle. in the ideal case, the reverse diode voltage drop vd zero, between open and closed and the inductor current is constant. led signage
ic design and system design team, we first of all vendors from the system requirements, the definition of a suitable ic, re-use self-developed technology, the development of mature the ic design system product solutions for customers. the whole process linked together, through the connectivity, performance, cost has a unique advantage for our customers to provide a full range of system optimization program. for example, bcd to lcd tv market development program of high-voltage led driver is designed based on system requirements of the leading products. designed with focus on high-voltage led drivers, focus on optimizing the efficiency of performance, adjust the led current matching increases the required voltage reference accuracy, enhanced pwm dimming linearity, and designed a variety of dimming required protection. in addition, the system needs to provide different product packages, according to the needs of customers to differentiate their system design. advertising signs
to reach 6,000,000 in 2004. production of fluorescent matsushita elecic fluorescent lamps since 2001 the implementation of leasing, and began to establish regeneration device in 2007 after the self-production and post-retirement deal with all fluorescent lamps. 3, solve environmental pollution problems lighting indusy countermeasures to conol and improve the production and use of elecic light during the emergence and spread of harmful substances, the author proposes the following solution. 3.1 sengthening the management of production processes, reduce the mercury from the source from the production processes on the amount of elecical lighting manufacturers to sengthen the management, the main purpose is to reduce the source of production processes the use of mercury, thus reducing the threat of mercury to the environment . banners signs