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PMIC - LED Drivers

Energy efficient, reliable, and long-life LED lighting, for both indoor and outdoor lighting applications, have now become commonplace, due to advances in LED technology. To effectively control and power LED lights in these applications, efficient LED drivers are required. The LV5212VH-MPB-H LED driver from Toshiba is a Constant On-Time (COT) primary side Feedback circuit IC designed for buck or buck-boost topologies that operate from a wide input voltage range.

Application Field

The LV5212VH-MPB-H LED driver is suitable for isolated, non-dimmable LED drivers in applications such as Architectural lighting, Street and tunnel lighting, Automotive lighting, Outdoors lighting, Flood lighting and other general lighting.

Working Principle

The LV5212VH-MPB-H LED driver is designed to offer a simple, cost effective and reliable solution for driving LED’s from a wide range of input voltage sources (<150V). The driver is based on a Constant On-Time (COT) primary side Feedback circuit, where the average output current is sensed across the LED string without the need for any optocouplers. This COT architecture is combined with a quasi-resonant topology, offering a high level of efficiency when operating at light or medium loads. The innovative control loop employed in the LV5212VH-MPB-H LED driver offers a smooth transition between the discontinuous conduction mode (DCM) and the critical conduction mode (CRM). This ensures better regulation, while reducing the peak stress on the components and improving power density.

Current and temperature protection features include Over Current Protection (OCP), Over Temperature Protection (OTP) and open circuit protection. This ensures that the driver can safely operate with a wide range of ambient temperatures, while protecting it from any mishandling. The driver can be easily controlled via the Enable pin on the IC and can be used with a wide range of external components, even those of lower cost, for a 3.3V / 5V control voltage operation.

Conclusion

The LV5212VH-MPB-H LED driver from Toshiba is a highly efficient, reliable and cost effective solution for driving LEDs from a wide range of input voltages. With its impressive features and innovative control loop, the LV5212VH-MPB-H is ideal for a variety of applications in automotive, street lighting, flood lighting and other general lighting systems.

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