Do you ever find yourself frustrated while designing the power supply for your end application? Designing for power-supply loop compensation and calculating the poles and zeros can be difficult, especially for inexperienced power-supply designers. Loop-compensation design can also be very time-consuming, thus adding more pressure if you only have a short amount of time to complete your designs.
Despite complicated calculations and deadline stresses, you still have to maintain high power density and efficiency. Yet programming soft-start times and undervoltage lockout (UVLO) and setting current limits can be another painful task. Luckily, there are several point-of-load (POL) DC/DC solutions to make your power-supply design process easier and faster.
TI’s direct connect to the output capacitor (D-CAP™) is an adaptive on-time control technology that requires no phase compensation. Compared to voltage and current mode, D-CAP solutions deliver faster load-transient responses, resulting in fewer output capacitors, lower bill-of-materials (BOM) costs and higher power density. Many of our D-CAP solutions include a power management bus, or PMBus. Through TI’s PMBus power solutions, you can easily program and adjust soft start, UVLO, current limit and other parameter values with a few simple clicks using TI’s Fusion Digital Power Designer graphical user interface (GUI). Programming and customizing a PMBus power supply does not require software knowledge; you’ll program via straightforward PMBus commands and their values, which occupy a dedicated set of registers on the I2C bus. Along with D-CAP control mode, PMBus enables ease of use, reduced design time and component count.
The TI Designs Complete PMBus Power System for Enterprise Ethernet Switches Reference Design is a PMBus power system for application-specific integrated circuit (ASIC)/field-programmable gate array (FPGA) cores; DDR4 core memory; and auxiliary voltages found in high-performance power supplies such as Ethernet switches, storage, servers, and test and measurement applications. TI will be demonstrating this buck power supply at the 2016 Applied Power Electronics Conference (APEC).
The reference design features:
Figure 1: Complete PMBus Power System for Enterprise Ethernet Switches Reference Design block diagram
The reference design includes:
The reference design offers multiple benefits:
Don’t sweat over how to design your buck power supply. With TI’s D-CAP technology and PMBus solutions, you will have your buck power supply up and running in no time.
See a live demonstration of the PMBus power system in TI’s booth (No. 1617) at the Applied Power Electronics Conference (APEC), March 21-23 in Long Beach, California. Follow TI at www.ti.com/apec2016. Attend the “Next Gen PMBus Point-of-Load Solution” presentation, presented by TI in the Wurth booth (No. 1933) on Monday, March 21 at 7p.m. and Wednesday, March 23 at 1p.m.
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