BD9137MUV-E2 Integrated Circuits (ICs)

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Buck converters, Boost converters, and SEPIC converters have emergesd as the prominent DC/DC converters because of their simple structure, light weight, and high efficiency. Among them, Buck converters have attracted attention due to their low cost and easy implementation. Taking advantage of these features, the BD9137MUV-E2 low voltage DC/DC Buck converter works efficiently for a range of applications.

The BD9137MUV-E2 is a two-phase Buck converter that can process output voltages from 0.8V to 3.2V at output currents up to 2A. It is based on control architecture with a smart power technology (SPT) that utilizes the current mode control scheme with a hysteresis band current sensing designed to improve ripple performance and stability. The integrated SCHOTTKY barrier diodes eliminate the need for external diodes which reduces component count.

The BD9137MUV-E2 operates with a wide operating voltage range of 3.0V to 8.5V and a wide temperature range of -40°C to 125°C. It also supports PWM and linear mode control of the switching frequency up to 2MHz. The device also features adjustable slew rate control and an adjustable soft-start function to minimize inrush current. It also includes over-current protection (OCP), over-voltage protection (OVP), and thermal shutdown (TSD) to ensure safe operation.

Application field

The BD9137MUV-E2 is ideal for a wide range of applications. It is suitable for a variety of power supply designs such as notebook PCs, tablet PCs, and mobile communication base station. It is also suitable for LED lighting and DC motor control applications. The device can be used to provide the regulated power needed by various peripherals such as CPUs, ASICs, DACs, LDOs and power amplifiers.

Working principle

The BD9137MUV-E2 utilizes a two-phase converter topology with one phase being used for the high-side switch and the other for the low-side switch. The operating principle is based on pulse width modulation (PWM) to turn the converter on and off, controlling the output voltage. The internal power MOSFETs are driven with a voltage higher than the output voltage. When the low side switch is turned on, the output voltage is discharged and when the high side switch is turned on, the output voltage is charged.

The feedback circuit measures the output voltage and compares it to a reference voltage. Depending on the difference between these two voltages, the device adjusts the duty cycle of the PWM signal to allow more current to pass so that the output voltage is regulated. The PWM signal also controls the current regulation. When the current exceeds the reference current value, the PWM signal is reduced, thus controlling the current.

The BD9137MUV-E2 is a simple and efficient DC/DC Buck converter designed for a wide range of applications. Its high efficiency and flexibiltiy make it an ideal solution for various power supply designs. The device provides a wide range of operating voltages and current, with integrated protection features ensuring system safety.

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