Microchip announces its latest Digitally Enhanced Power Analogue (DEPA) controllers: the MCP19118 and MCP19119. They provide simple, effective analogue PWM control for DCDC synchronous buck converters up to 40V, while also offering the configurability of a digital microcontroller.
The MCP19118 and MCP19119 are also the industry’s first devices to combine 40V operation and PMBus™ communication interfaces.
These features enable designers to quickly develop power-conversion circuits with an analogue control loop which is programmable in the firmware of the integrated 8-bit PIC® MCU.
Important system settings, such as switching frequency, current limits and voltage set points, can be adjusted on-the-fly by issuing write commands to the registers in the device. This means that a single hardware design can be re-used in multiple end-products, using firmware updates to change the configuration. This minimises the design, production and inventory requirements across multiple product platforms. Additionally, the integrated PIC® MCU core can be used to monitor other parts of the application to:
- sequence start-up operations
- intelligently manage faults, under-voltage or brown-out conditions
- perform housekeeping functions
- adjust power outputs in response to load requirements, such as battery charging or USB port power
- assist the module’s external interfaces by monitoring or delivering signals to the user or system
Featuring integrated linear regulators, PWM generators, ADCs, MOSFET drivers, analogue error amplifiers and control-loop compensation, the MCP19118/9 devices provide a compact circuit solution. Properly implemented, a system based on the MCP19118 or MCP19119 is capable of high conversion efficiency and excellent transient response, resulting in reduced system power losses, the use of smaller heat-sinks and longer battery life in portable applications.
Programming tools available for the MCP19118/9 include the MCP19111 Design Analyzer and Graphical User Interface Plug-in for the MPLAB® X integrated development environment.
- Battery charging circuits
- LED drivers
- USB power delivery
- Point-of-load power supplies
- Automotive power supplies
- Switching frequency range: 100kHz to 1.6MHz
- Input voltage range: 4.5 to 40V
- Output voltage range: 0.5 to 3.6V
- 5mA quiescent current
- 10-bit ADC