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LED Drivers

PLDA25-530-277A is a LED driver developed by Powerlink Technology Inc. It is a current-mode boost LED driver IC supported by auto-frequency scaling for improved LED efficiency and stability. This LED driver utilizes both internal and external components to guarantee up to 95% efficiency in high power LED applications.

Application Field

The major applications for PLDA25-530-277A LED driver includes outdoor lighting, industrial lighting, automotive LED applications, street lights, and several sign applications. Generally, PLDA25-530-277A is a cost-effective solution for medium or high power LED applications with an input voltage from 8V to 55V and an output power up to 530W.

Working Principle

To put it simply, the working principle of a LED driver is to convert AC to DC power with higher voltage and current to suit the LED application. The AC power is typically a household line from a wall socket. The LED driver then stepped-up DC voltage using MOSFETs or transistors and manages the current to produce continuous constant current. That constant and adjustable current will pass through the LED and allow it to illuminate accordingly.

In the case of PLDA25-530-277A, it is a current-mode boost LED driver IC with auto-frequency scaling. This IC employs a constant-current-mode control circuit consisting of a synchronous buckle, a power MOSFET, an error amplifier, and a smart current source. The current source not only helps to face off the switch spread, but also extends the efficiency in near 100% in single-ended topologies. Encouraged by an internal frequency pre-scaling setting resistor, PLDA25-530-277A generates the exact output current upon detecting the voltage between drain and source pins of the power MOSFET.

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