Rui core technology released SMD802 first 500V high voltage process LED driver IC

Taiwan Rui Rui Polytron Technologies Inc draw lessons from the former Soviet Union high pressure process technology, combined with the current LED advanced control design, in the recent launch of the city TV power LED drive IC SMD802. The product can directly replace the existing market products.

SMD802 is a highly efficient PWM LED constant current driver application design using IC, the input voltage can power directly rectifier power supply, the highest 450V DC; up to 300KHz programmable frequency drive external high voltage MOSFET; external load current sampling resistor set from 10mA to 1A; SMD802 can also provide low frequency gray PWM dimming function. The proposed design 200Hz-1KHz.

SMD802 is a low cost buck, boost, lift pressure control chip, especially for the design of multi drive LED or LED array. This chip is suitable for universal AC AC input and DC input is also applicable to the 8450V. AC input, in order to improve the power factor, can refer to the current energy-saving lamp circuit, the input power is less than 25W, can be easily added to the passive power factor correction circuit in the circuit to achieve.

SMD802 can drive hundreds of high brightness LED series or the number of strings of high brightness LED, these LED can be designed into a string or a series parallel combination of SMD802 by adjusting the value of the constant current can ensure the LED brightness and spectral and the extension of life. SMD802 is characterized by the enable pin PWM_D can be used pulse width modulation (PWM) method to adjust the brightness of the LED, but also to enable the end, when the end of the chip suspended without output control. SMD802 can also adjust the output current of LED to control the brightness (also known as linear dimming) by the way of LD terminal voltage regulation.

SMD802 can control all the converters including isolation / non isolation, continuous / discontinuous, etc.. When the power of MOSFET GATE output high level external drive, LED drive will be stored in the energy input inductor or transformer primary inductance converter, rely on different types of energy storage and energy will be transmitted directly to the LED on MOSFET, when the power is turned off, stored in a magnetic element on the energy conversion LED on the current drive. (working in Flybac mode). SO8 and DIP8 to provide two forms of packaging.

Source: International Electronic Business