Microchip announces its latest Digitally Enhanced Power Analogue (DEPA) controllers—the MCP19118 and MCP19119 (MCP19118/9). They provide simple
yet effective analogue PWM control for DC-DC synchronous buck converters up to 40V, with the configurability of a digital MCU. They are also the industry’s first devices to combine 40V operation and PMBus™ communication interfaces.
These features enable quick power-conversion circuit development with an analogue control loop that is programmable in the integrated 8-bit PIC® MCU core’s firmware. This integration and flexibility is ideal for power-conversion applications, such as battery-charging, LED-driving, USB Power Delivery, point-of-load and automotive power supplies.
In addition to the rapidly growing popularity of digitally-controlled power supplies, due to their configurability for a variety of operating conditions and topologies, power system designers also have an increasing need for the ability to report telemetry and conduct two-way communication, typically for monitoring and fault reporting, via standard communication interfaces such as PMBus. Additionally, the recently released USB charging specifications, USB Power Delivery and the USB type C connector, include variable charging voltages which allow for rapid device charging, but add potentially difficult hardware requirements.
By integrating a supervisory microcontroller, the MCP19118/9 devices can create programmable power supplies. Key system settings, such as switching frequency from100 kHz to 1.6 MHz, current limits and voltage setpoints, can be adjusted on-the-fly during operation by issuing write commands to the registers in the device. One design can then be reused for additional applications, using firmware updates to change the configuration, which minimises design, production and inventory requirements across multiple platforms.