LED driver power chip
LED driver chip, in fact, is a PWM control chip, after the normal operation of the circuit, through the back of the current sense resistor on the detection of LED current and voltage feedback to the chip, control the internal PWM duty cycle, in order to adapt to changes in LED's own characteristics The resulting current, voltage fluctuations, so that the current LED to maintain a constant.
LED driver principle and function
LED driver refers to the power LED that drives LED lighting or LED module components to work properly. Due to the conduction characteristics of the LED PN junction, it can adapt to the power supply voltage and current fluctuations in a very narrow range, a slight deviation may not turn on the LED or a serious reduction in luminous efficiency, or shorten the service life or even burn the chip. The current power frequency power supply and common battery power are not suitable for direct supply LED, LED driver is this kind of LED components can drive the best voltage or current state of the electronic components.
1, LED is a characteristic sensitive semiconductor device, but also has a negative temperature characteristics, LED drive power (also known as the driver) is in the process of its stable state of protection.
2, LED devices on the drive power requirements are almost harsh, unlike LED incandescent light bulbs, you can directly connect the 220V AC mains. LED is a low-voltage driver, you must design a complex conversion circuit, LED lights for different purposes, to be equipped with different power adapter. The design of a good power supply must take into account the efficiency conversion, effective power, constant current accuracy, power life, electromagnetic compatibility of these factors, because the power in the role of the entire lamp is just as important as the human heart.
Shenzhen Teng Huatai Electronics Co., Ltd. Main products for the transient Yang system diodes, rectifier diodes fast recovery series Diode, Schottky diodes, high-voltage series diodes, diode series diode switching regulator, bridge reactor, diode particles, Semiconductor power diodes, semiconductor power thyristors, automotive rectifier diodes and a variety of die-cutting products special viscose products, all kinds of tape. Various printed products and other semiconductor devices, the annual production capacity of 1.5 billion. Teng Huatai Electronics is a diode manufacturer in Shenzhen, Shenzhen bridge pile manufacturer, LED driver IC manufacturers in Shenzhen, welcome to information consultation ...
