DP12688TGY

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DP12688TGY is a widely used, high-performance, off-line led driver integrated circuit, specially designed for the rapidly expanding led lighting market.It integrates a 700V power switch MOSFET, and power supplying system driving, and built-in over-current, over-voltage and short circuit protection functions, etc. It supports wide input voltage range and integrates optocoupler with peak voltage of 5.5V. Its high integration and high power density let it widely applied in 10W~20W, etc. LED driving lights.

The working principle of the DP12688TGY is shown as follows: First, the input voltage passes through the secondary side PFC power factor correction circuit to keep the input PFC constant at 0.98. Then the rectified voltage is reduced and filtered to provide a stable voltage for the steady power supply of the device. After entering the internal switch, the input is one-way rectified voltage, providing the load with the necessary DC voltage.

In addition, the DP12688TGY also has built-in over-current protection, over-voltage protection and output short circuit protection.The over-current protection uses an internal P-type MOSFET sensing resistor to get voltage signal after the current flowing through the sensing resistor. When the sensed voltage surpasses a certain threshold, the internal flip-flop will be reset, thus breaking the power loop.

The over-voltage protection uses a voltage sensing control terminal to sample the voltage of the output terminal, and when the voltage exceeds a certain value, the internal flip-flop will also be reset, cutting off the output circuit of the working loop.Finally, when the output is in a short-circuit state, the power switch will be switched off within 0.2μs, so that the load can be effectively protected.

The DP12688TGY is a highly integrated and cost-effective solution for providing high quality LED lighting with consistent performance and high reliability. It is widely used in LED lighting, LED tube light, High power LED and LED strip light, etc. With its high-performance, wide voltage range and convenient input and output terminals, the DP12688TGY is ideal for a variety of applications.

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