IR2161SPBF

IR2161SPBF is a highly optimized, high performance, non-isolated linear mode power factor correction (PFC) controller, with integrated high and low-side FET Driver and one feedback/sample unit. It has a wide variety of applications in low-end off-line AC/DC power converters, especially in electronic lighting, ballast controllers and related products. The IC has very low parts count and an integrated PFC first and boost stages. This makes it an ideal choice for compact and cost effective power supply designs.

The working principle of the IR2161SPBF is that it integrates several low voltage CMOS devices and a high voltage pulsed power MOSFET driver with a wide input voltage range. The MOSFET driver is turned on and off by the enable/disable input, which controls the PFC stage power. When the enable/disable input is set to low (shutdown state), the PFC device is disabled and the internal start up timer is activated. When the enable/disable is set to high (operating state), steady state control of the PFC converter is achieved using a negative current/voltage feedback loop.

In the steady state PFC control, all the power regulation is achieved by continuously adjusting the power switch’s on-time and the amount of energy fed back to the power MOSFET. The PFC’s power is adjusted depending on the load demand and the input voltage level. The IR2161SPBF has several additional built-in features that help optimize the system’s design and performance. These features include fast startup/shutdown times, undervoltage control, soft-start, pre-bias UV protection, over current and short-circuit protection, etc.

The IR2161SPBF is a highly capable and reliable power supply design for electronic lighting, ballast controllers, and other low-end applications. Its integrated features and simplicity make it an ideal choice for economical system design. It is easy to use, cost efficient and can work with a wide range of input voltages, load levels, and topology requirements.