MCP19125T-E/MQ [Microchip]

The MCP19125 is a mid-voltage (4.5-42V) analog-based PWM controller with an integrated 8-bit PIC^TM Microcontroller. This unique product family combines the performance of a high-speed analog solution, including high-efficiency and fast transient response, with the configurability and communication interface of a digital solution. Combining these solution types creates a new family of devices that maximizes the strengths of each technology to create a more cost-effective, configurable, high-performance power conversion solution. These products allow the development of flexible power supplies that can be configured perfectly to the target application with minimal external components. In addition, these devices can be programmed to dynamically respond to measurements or events within the system, dynamically tailoring the operation to the environment, or intelligently responding to faults for robust operation.
This device contains two independent outer control loops, which can be configured with separate feedback networks, and separate references. The analog voltage loop can be set to control a constant voltage, or the analog current loop can be used to set a constant current on the output. Regardless of which outer loop is being used, both outer loops take advantage of a faster, inner current loop for peak current mode control with fast transient response. With this unique architecture, switching between constant-voltage and constant-current operation is smooth and monotonic; it can be done dynamically during operation without glitching or undesirable transient effects.

• Smooth, dynamic transitions from constant-current to constant-voltage operation using the unique control loop architecture
• Dynamically adjustable output current and output voltage over a wide operating range
• Wide operating voltage range: 4.5-42V
• Analog peak-current mode Pulse-Width Modulation (PWM) control
• Integrated 8-Bit PIC® Microcontroller
• Significant configurability: adjustable output voltage, output current, MOSFET deadtime, leading edge blanking time, thermal responses, slope compensation, over-current protection, over and under voltage lockout levels
• Available fixed frequency or quasi-resonant operation, adjustable 31 kHz to 2 MHz
• I2C communication interface
• 13 GPIO
• Integrated synchronous low-side MOSFET drivers
• Integrated high voltage linear regulator, with external output
• Integrated temperatures sense diode
• Integrated 10 bit A/D converter
• Minimal external components needed
• Custom algorithm support
• Topologies supported include Boost, SEPIC, Flyback, and Cuk