Digitally controlled power management examples

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Digitally controlled power management examples [Copy link]

At present, the more common functions of PMP include: MPEG4 playback, TV program recording, MP3/WMA audio playback, recording, picture display, games and storage functions (HDD/CF/SD), etc. Power supply is the root of the stability of the entire system, and power consumption is a sensitive issue for PMP , so this should be considered when selecting chips. In the past few years, power management device suppliers have been developing single-chip solutions that can meet multiple needs. This not only reduces the number of ICs, but also eliminates the discrete devices that support these ICs, reduces product costs, and reduces product size.

The LP5550 chip , the industry's first digitally controlled PowerWise power management unit (EMU) chip launched by National Semiconductor, not only supports adaptive voltage regulation to help extend battery life, but also supports more new features. Battery-powered portable products can reduce the power consumption of digital processors by using this highly integrated power management chip. The chip can be used with National Semiconductor's advanced power controller and ARM's intelligent power management (IEM) technology to reduce the power consumption of digital processor cores by 70%. Its advanced power controller can also support the open PowerWise Interface (PWI) standard established by the two companies for the industry.

In addition to considering power consumption in hardware design, it is also necessary to consider it in software design. After the hardware design is completed, the power consumption is generally determined, but the programmability of the chip can be used to reduce the system power consumption as much as possible. While providing the best effect, the software adjustment can be used to obtain the longest standby and playback time. One method is to put the chip into low power mode when in standby mode.