V72C15E150BF2

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DC-DC converters convert a source of direct current (DC) from one voltage level to another; they are used in a variety of applications. The V72C15E150BF2 DC-DC converter is specifically designed to convert up to 150V DC into a lower voltage for use in automotive, industrial, telecom and medical applications.

Understanding the working principles of the V72C15E150BF2 will assist with design, troubleshooting and repairs.

Power Modules

The V72C15E150BF2 is a high performance DC-DC converter with a power module design that enables it to support up to 150Vdc input. It features an IC controller and gate drivers with power MOSFETs on an insulated metal substrate, which provides both lower on-state resistance and stronger voltage isolation compared to conventional DC-DC converter designs. The V72C15E150BF2 operates from an input voltage range of 9-65Vdc and provides a regulated output of 8.5Vdc for loads up to 10A. Its low profile surface mount package with full load efficiency up to 89%.

Topology

On-board protection and a variety of control functions are provided by the chip and gate driver circuits, such as under-voltage lockout (UVLO), over-voltage (OVP), over-temperature (OTP), and over-current protection (OCP). It uses a buck topology, also called Step-Down, to regulate the output voltage to levels lower than the input voltage. In the buck topology, the power is transferred from the input to the output through a power switch and a current-sensing circuit. When the switch is closed, the current builds up from the input voltage and produces an output voltage that is lower than the input voltage. The output voltage is regulated by controlling the on-time of the switch.

Modes of Operation

The V72C15E150BF2 can be configured for either continuous conduction mode (CCM) or discontinuous conduction mode (DCM) operation. In CCM, the inductor current never drops to zero, allowing the converter to achieve higher efficiency while providing a more regulated output. In DCM, the inductor current drops to zero, allowing the converter to handle higher output currents while still delivering a regulated output.

Control Loop

The main control loop is Vout/Iout control, which is used to regulate the output voltage. It compares the target output voltage to the actual output voltage and adjusts the on-time of the switch accordingly. The second loop is current control, which is used to regulate the output current. It measures the output current and limits it to the set current limit. The control loops are optimized for fast Transient Response and minimum output ripple.

Application Field

The V72C15E150BF2 is primarily used to convert a DC voltage of up to 150V to a lower voltage for use in automotive, industrial, telecom and medical applications. Typical applications include adjustable voltage and current applications, such as battery chargers, LED lighting, power supplies, motor control and power conditioning for switched mode power supplies (SMPS). It is also suitable for automotive applications such as automotive CPUs, RF transceivers and audio systems.

Conclusion

The V72C15E150BF2 DC/DC converter utilizes a power module design and delivers high performance in a low profile package. It operates from an input voltage range of 9-65Vdc and provides a regulated output up to 8.5Vdc for loads up to 10A. It features an IC controller and gate drivers, and provides protection, along with a variety of control functions such as under-voltage lockout, over-voltage, over-temperature and over-current protection. The V72C15E150BF2 is suitable for a variety of applications, including adjustable voltage and current applications, such as battery chargers, LED lighting, power supplies, motor control and power conditioning for SMPS.

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