The new MCP19114 and MCP19115 from Microchip are analogue-based controllers with a digital interface, offering a combination of adjustability and low cost in a high-performance power-conversion solution.
The new devices feature a step-up PWM controller and a low-side MOSFET driver, with a mid-voltage LDO and a fully functional microcontroller integrated into a small package.
The microcontroller is a standard PIC® MCU similar to the PIC12F617. As hybrid digital/analogue control solutions, the MCP19114 and MCP19115 offer the speed and responsiveness expected of a high performance analogue control loop, while also providing the flexibility expected of an MCU.
They can be configured to implement multiple topologies including flyback, boost, and Single-Ended Primary-Inductor Converter (SEPIC).
Complete customisation of operating parameters, start-up or shut-down profiles, protection levels and fault-handling procedures may be accomplished by setting digital registers with Microchip’s development software.
Both the MCP19114 and the MCP19115 support operation up to 42V, making them suitable for use in automotive applications, while also supporting conventional 5V, 12V and 24V rails.
The devices’ loop implements peak current mode control. They can operate in quasi-resonant current mode or at a fixed frequency in a range from 31.25kHz to 2MHz.
The MCP19114 is available in a 24-lead QFN 4mm x 4mm package, and the MCP19115 in a 24-lead 5mm x 5mm QFN.
- Consumer electronics
- Automotive systems
- 5mA quiescent current
- 30μA sleep current
- Differential remote output sense
- Integrated low-side differential current sense amplifier
- Current regulation accurate to ±5%
- Thermal shut-down protection