Overview:
The LTC3883 / LTC3883-1 is a general purpose, single channel, polyPhase®, step-down controller with digital power system management, high performance analog control loop, built-in drivers, remote output voltage sensing and inductor temperature Detection function. To minimize solution size and cost, the LTC3883 / LTC3883-1 employs Linear Technology's patent-pending auto-calibration program to measure the inductor DC resistance, measuring current on a cycle-by-period basis across the inductor ( Lossless DCR detection) Get accurate output current measurements. The LTC3883/-1 is based on the popular dual channel LTC3880/-1.
Digital power management
The challenge for today's data center systems is to maximize efficiency at all levels of the system, including point of load, board, rack, and even installation, to become more environmentally friendly. For example, sending workflows to as few servers as possible, shutting down servers that are not currently needed, etc., can reduce overall system power consumption. The only way to do this and achieve system performance goals (calculation speed, data transfer rate, etc.) is to use a comprehensive digital power management system to monitor all levels of power consumption data in real time.
In the past, designers used a bunch of mixed ICs to piece together digital power management solutions, including supervisors, sequencers, DACs, and ADCs. In addition to the inherent complexity, such solutions are not easily scalable and require extensive upfront planning for future system upgrades. The LTC3883 / LTC3883-1 DC/DC controller combines all of the digital power management features to eliminate this complexity, resulting in an easy-to-use, rugged and flexible point-of-load (POL) power management solution.
The LTC3883 / LTC3883-1 can operate autonomously or through an industry-standard I2C serial bus to communicate with the system's main processor to obtain commands, implement control, and report telemetry data. This allows critical operational information such as real-time voltage, current and temperature to be monitored directly from the LTC3883 / LTC3883-1, which can be used to dynamically optimize system performance and reliability. By accessing this information, you can predict power system failures and take preventive or mediating actions.
Important regulator parameters such as output voltage and current limit, margin control voltage, overvoltage and undervoltage monitoring limits, startup characteristics and timing, and fault response can be set directly through the serial bus without the need for External components such as resistors, sequencers, and monitoring ICs.
Thanks to digital power system management, complex multi-track systems can be developed quickly and efficiently. LTpowerPlayTM software further simplifies design and monitors boards and adjusts parameters via a PC. This allows designers to debug and test online (ICT) without having to reroute or replace components.
Figure 2: High efficiency 500kHz 1.8V step-down converter with DCR detection (please read the PDF for details)
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Pure sine wave output
The electrical waveform output of PH1800 is pure sine wave, which has the same quality as practical power supply or household power supply. This waveform is suitable for most electrical equipment, appliances and tools. This pure sine wave unit provides more functions than an improved sine wave inverter because it has a cleaner form of power. Pure sine wave can also reduce the noise generated when applying electrical appliances to a limited extent.
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