BD3507HFV-TR

BD3507HFV-TR Application Field And Working Principle

Introduction

The BD3507HFV-TR is a high efficiency linear voltage regulator and active PFC controller from ROHM Semiconductor. The device incorporates external power MOSFET and resistive divider management to provide a total solution for flyback-type AC-DC converters.

Application Field

The BD3507HFV-TR offers an optimal solution for AC/DC, battery-powered, and PoE (Power over Ethernet) applications for DC output voltages from 5V to 24V. It is an ideal choice for applications such as:

• Server power supplies
• Desktop PCs
• Battery-powered devices
• Computer peripherals
• Home appliances

Features And Benefits

The BD3507HFV-TR offers a range of features and benefits:

• High Efficiency − Low power dissipation is achieved with a high efficiency of 95.5% at an output voltage of 5V and 75mV output ripple.
• Built-in Active PFC Control − The device provides active PFC control without the need for additional components or circuitry.
• Input Voltage Range − The device operates off a wide input voltage range from 4.75V to 28.0V.
• Output Voltage Range − The BD3507HFV-TR is suitable for a wide output voltage range from 5V to 24V.
• Thermal Shutdown − The device has a thermal shutdown circuit which protects the system from thermal runaway.
• Current Limiting Protection − The device incorporates a comprehensive range of current limiting protections.

Working Principle

The BD3507HFV-TR is a linear voltage regulator which uses an external power MOSFET and a resistive divider to control the output voltage. The device incorporates a voltage reference (Uref) and current sense amplifier to provide active PFC control. The BD3507HFV-TR measures the input voltage (Vin), and adjusts the duty cycle of the power MOSFET switch to deliver the required output voltage.

The device provides soft start, overcurrent protection, thermal shutdown and latch protection to ensure reliable operation. The device is easy to use and requires only a few external components such as an external power MOSFET, resistors and output filter capacitor.

Conclusion

The BD3507HFV-TR from ROHM Semiconductor is a high efficiency linear voltage regulator and active PFC controller, designed for AC/DC, battery-powered, and PoE (Power over Ethernet) applications. The device provides a comprehensive range of features, including high efficiency, input voltage range, output voltage range, thermal shutdown and current limiting protection. The device is easy to use, and requires only a few external components.