Smallest form factor in power design


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Silanna Semiconductor’s new family of high-voltage and high-frequency inverters for USB-PD applications focuses on the latest energy management challenges in terms of energy density and efficiency. Silanna’s SZPL3102A / 3103A family of two DC-DC inverters (buck regulators) operate up to 2MHz. It offers the industry-leading wide I / O range converters that support up to 24VDC in a small QFN 3mm x 3mm form factor. In an interview with Tim Wilhelm, Marketing Manager, he explained that higher switching frequency means smaller and less expensive output filter in transformers, which greatly reduces BOM cost, design cycles and time in the market. However, in the case of DC / DC converters, the decision is often very difficult due to the combination of factors that must be taken into consideration such as size, dissipation, insulation, electromagnetic compatibility and electrical performance. Small Space The design of power systems involves a number of trade-offs between design factors such as size, cost, efficiency, and load transit performance. In general, certain characteristics such as transient tolerance, voltage ripple and load characteristics must be specified for the power phase design. In order to create a system with higher uptime and smaller size, system designers focus on improving power conversion efficiency using advanced circuit topology through better management of battery characteristics. Lower efficiency translates into higher energy dissipation that needs to be managed properly. Lower switching frequencies reduce switching losses, while higher frequencies provide better performance with faster transient response. USB Power Design The electrical characteristics of the SZPL3102A and SZPL3103A improve their performance in USB port power applications. Small power dissipation allows for very low no-load capacity which is an important specification for obtaining regulatory certification. In addition, the SZPL3102A has an internal instantaneous feedback path that enables a well-controlled clean operation at startup so that external USB-PD controllers can bias and control the output voltage. The SZPL3102 includes an internal FB resistor divider allowing some PD controllers to operate and control smoothly. The SZPL3103 allows an external FB resistor splitter for independent operation and collaboration with other USB port controllers that use a network of external splitters, ”said Wilhelm. And added,“ SZPL3102 / 3103 is the latest synchronous buck switch. Well suited for USB port power supply applications. Figure 1: SZPL3102 | SZ3103 Block Diagram. Figure 2: SZPL3102 | Efficiency SZ3103 Figure 3: Two versions Designed for Optimum Power Delivery Performance (PD) DC-DC converters are complex systems. Even when simplified by highly integrated integrated circuits, it still requires component intensive calculations and weighted ICU selection. Moreover, it is sensitive to the layout of the board and parasitic components (i.e. non-ideal component properties, such as resistance in the capacitor or capacitance in a MOSFET switch). USB PD allows devices to act as a power source or user through a USB connection. USB PD enables faster charging of peripheral devices and allows devices such as smartphones, tablets, and laptops to operate over a USB connection, reducing the need for main power adapters. The network display can power the laptop via the USB-C port, it can act as a hub for peripheral devices such as external hard drives, and it can also receive and display video information from the laptop. In addition to the devices for efficient power transmission solutions, power lines also require protection. .


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