SUS3243R3B

DC/DC converters enable the transfer of energy between two direct current (DC) electric circuits. They are frequently used to convert one voltage level to another, such as converting the battery voltage in a portable product to the higher voltages required by integrated circuits. The SUS3243R3B is a medium power, single-output step-down DC/DC converter designed to meet the needs of a wide variety of applications.

Application Field

The SUS3243R3B is ideally suited for cost-sensitive applications that require a highly integrated and reliable point of load solution such as telecom equipment, networking and industrial automation systems. It can operate from input voltage sources ranging from 6V up to 42V. With a high-efficiency 94 percent and a maximum load current of 3 A, the device can meet power requirements up to 12W.

The SUS3243R3B offers four operating modes to improve the system performance: pulse-frequency modulation (PFM), pulse-width modulation (PWM), burst mode, and default mode. The default mode provides the lowest power consumption when no load current is required. It is well-suited for low-power-consumption, space-constrained products which require a high level of efficiency.

Working Principle

The working principle of a DC/DC converter is simple. An input voltage is applied to a power switch, which is then connected to the primary winding of a transformer. The input voltage creates a current in the primary winding, which in turn induces a current in the secondary winding. The secondary winding is connected to an output filter, which converts the alternating current output from the secondary winding into a direct current output. The output voltage can be adjusted by changing the ratio of the number of turns of the primary and secondary windings.

The SUS3243R3B is equipped with advanced features to ensure excellent performance and to reduce external system components. These include output voltage tracking, input overvoltage protection, overcurrent protection, short circuit protection, hiccup mode, and over temperature protection. The SUS3243R3B also includes features such as high-frequency switching, fixed operating frequency, and soft start for improved system performance. The device is qualified to RoHS standard, ensuring compatibility with lead-free products.

The SUS3243R3B is an integrated DC/DC converter solution that offers superior performance and reliability. With its wide input voltage range, high efficiency, protection features, and low external component count, it is well-suited for a wide range of products.