18.104.22.168. PPMC Example Design
A single channel of the PPMC typically provides the following features:
- Differential sense line inputs to remotely monitor the load voltage.
- Digital-to-Analog Converter (DAC) outputs to trim the regulator output voltages. The DAC outputs drive the regulator's feedback input (fb) and control the regulator's output voltage.
- Enable Outputs (EN1, EN2, ...ENn) that drive the voltage regulator's Enable Inputs (en). The regulator's enable inputs control the desired power-up/down sequence.
Typically, PPMC devices have multiple channels so that a single controller can sequence multiple regulators. If more channels are required than what is offered by a single device, then multiple devices can be cascaded. A separate host interface (PMBus or I2C) is used to connect the system processor and the PPMC to manage the controller software and programming.
Consult your power module vendor for more information about PPMC.
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