BD90620HFP-CTR

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PMIC (Power Management Integrated Circuits) can be broadly classified into Voltage Regulators, DC-DC Switching Regulators and Accessories. DC-DC Switching Regulators route power to the system, maintains supply voltage and protects a device from damage if it is overloaded or over charged due to a voltage spike or surge. A DC-DC switching regulator is a power conversion circuit comprised of several stages used to provide a stable and constant output voltage from an input voltage source. The BD90620HFP-CTR belongs to this category of power conversion platforms. This article discusses its application field as well as its working principle.

The BD90620HFP-CTR is a high switching frequency step-down DC-DC switching regulator, capable of supplying a maximum output current of 1.5A. It offers very efficient and reliable regulation of the output voltage and is capable of working up to a maximum of 85V (input voltage). The BD90620HFP-CTR is a fixed frequency current mode topology and it uses a constant on-time control method during the PWM cycle.

The BD90620HFP-CTR is ideally suited for power supply applications and mobile devices such as cellular phones, PDAs and laptop computers. It has been integrated into several mobile devices and its performance is highly dependable. The BD90620HFP-CTR has a low EMI, low start-up current, high efficiency and low profile, making it ideal for designs where space is a constraint. The BD90620HFP-CTR also has a wide input voltage operating range, and has been designed to be robust and safe, making it suitable for a wide range of applications.

The power stage of the BD90620HFP-CTR consists of an external MOSFET which is connected to an inductor and capacitor. The MOSFET acts as a switch and allows or prohibits the current flow in the inductor. During the conduction time, the external capacitor is recharged, thus maintaining the output voltage. A resistor is connected to the current sense terminal, and when the current reaches the predetermined level, the MOSFET is automatically turned off.

The BD90620HFP-CTR is designed for use with a synchronous rectifier, which enables more efficient power conversion. The synchronous rectifier is connected to the output of the power stage and functions in place of the diode. As the current decreases in the inductor, the synchronous rectifier turns on and enables current to flow from the output to the input. This results in higher efficiency and reduces the power loss associated with the diode.

The BD90620HFP-CTR is a highly efficient and reliable power conversion platform which is suitable for a wide range of applications. It is ideally suited for use in mobile devices, as it has a low EMI, low start-up current, high efficiency and a low profile. In addition, it has an integrated synchronous rectifier which makes it more efficient compared to other DC-DC switching regulators.

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