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DC-DC Converters and Power Supplies

Digital power supplies are becoming more common as developers look for ways to simplify their power-supply design, increase overall efficiency, easily make modifications and meet power-quality standards and regulatory requirements. Digital Switch-Mode Power Supplies (SMPS) meet these complex design requirements and enable system miniaturization in telecom, networking, server, automotive Electric Vehicle (EV) and a variety of other applications.

dsPIC® Digital Signal Controllers (DSCs) are designed to support power flow control of advanced topologies and Implementation of adaptive nonlinear algorithms for front-end power factor control converters and isolated DC-DC converters. You can use the same dsPIC DSC to implement power management, system monitoring and protection, and communication functions.

DIAG-AC-DC-ConversionCompleteDigitalControl

Phase-Shifted Full-Bridge DC-DC Converter

DC-DC Reference Designs

EPC9143 300W 1/16th Brick Power Module Reference Design

Brick DC-DC converters are widely used in data center, telecommunication and automotive applications to convert a nominal 48V to different output nominal voltages such as 5V, 9V or 12V. The standard dimension of a 1/16th brick converter is 33 × 22.9 mm (1.3 × 0.9 inches). The EPC9143 300W 1/16th Brick Power Module Reference Design, developed in collaboration with Efficient Power Conversion Corporation (EPC), is designed for 48V to 12V DC-DC applications. It features an EPC2053 enhancement mode (eGaN®) Field Effect Transistor (FET) and a Microchip dsPIC33CK32MP102 16-bit Digital Signal Controller (DSC).

EPC9148 48V Three-Level Synchronous Buck Converter Reference Design

This reference design is an ultra-thin, three-level DC-DC synchronous buck converter for high-performance computing systems with 60V maximum input voltage, 12.5A maximum output current and 19V output voltage. It measures only 3.5 mm component height (5 mm height total including the printed circuit board), achieving a power density of 400 W/in³. Developed in collaboration with Efficient Power Conversion Corporation (EPC), it features the high-performance dsPIC33CK Digital Signal Controller (DSC), the 40V EPC2055 and the 100V EPC2053 and EPC2038 GaN FETs.

EPC9153 250W, 48V High-Efficiency Thin Power Module Reference Design

This 6.5 mm thin power module is a 250W high-efficiency, high-performance synchronous buck converter with 60V maximum input voltage, 12.5A maximum output current, and programmable 12–20V (default set to 20V) regulated output voltage. This synchronous buck converter is ideal for high-performance computing and thin consumer electronics. Developed in collaboration with Efficient Power Conversion Corporation (EPC), it features the high-performance dsPIC33CK Digital Signal Controller (DSC) and EPC2218 and EPC2038 eGaN FETs

EPC9151 300W Bidirectional 1/16th Brick Power Module Reference Design

This reference design is a 300W bidirectional 1/16th brick DC-DC 48V to/from 12V converter. Measuring only 33 mm × 22.9 mm × 9 mm, the power module is ideal for applications data center, server power supply, computing, PCle® cards and storage applications. Developed in collaboration with Efficient Power Conversion Corp. (EPC), this reference design features the dsPIC33CK32MP102 Digital Signal Controller (DSC) and an EPC2152 12.5A ePower™ Stage device , which is a monolithic eGaN® FET half-bridge power stage.

Microchip’s 200W DC-DC LLC Resonant Converter Reference Design

Microchip’s 200W DC/DC LLC Resonant Converter Reference Design operates over a wide input voltage range (350–420 Vdc) with a nominal input of 400V, providing a 12V DC output, while maintaining high-voltage isolation between the primary and secondary. High efficiency is achieved through Zero Voltage Switching (ZVS) on the half-bridge converter and Zero Current Switching (ZCS) on the synchronous rectifier.

Quarter Brick DC-DC Converter Reference Design

This reference design provides an easy method to evaluate the power and features of SMPS dsPIC Digital Signal Controllers in high-density quarter brick DC-DC converters for Intermediate Bus Architectures (IBAs). This reference design is implemented using a single dsPIC33F “GS” digital power DSC from Microchip that provides the full digital control of the power conversion and system management functions.

Would you like to learn more about the advantages of switching to digital power supplies? Click on the link below to download our Features, Value and Benefits of Digital Control for Power Supplies white paper.

Recommended Products

dsPIC Digital Signal Controllers

Product Core Number of Pins Program Flash (KB) RAM (KB) IC/OC/
MCCP/SCCP
SMPS PWM ADCs Number of Op Amps/ PGAs Number of Analog Comparators Number of UART/I2C/
SPI Interfaces
dsPIC33EP 'GS' Family 70 MIPS Single Core Up to 80 Up to 128 Up to 8 4/4 16 Channels 1 nS 22 × 12-bit, 5x S/H 2 4x
2/2/3
dsPIC33CK 'MP' Family 100 MIPS Single Core Up to 80 Up to 256 Up to 24 9 16 Channels 250 pS 24 × 12-bit,
3x S/H
3 3 3/3/3
dsPIC33CH 'MP' Family 100 MIPS Dual Core Up to 80 Up to 512/72 Up to 48 + 16 8 + 4 8+4 Channels 250 pS 18 × 12-bit, 4x S/H 3 3 3/3/3
Legend:
IC = Input Capture
OC = Output Compare
MCCP = Multiple Capture/Compare/PWM
SCCP = Single Capture/Compare/PWM
SMPS PWM = Power Supply Pulse Width Modulation

Operational Amplifier

  • MCP6021 – 10 MHz, 1 mA  low-power dual op amplifier

Temperature Sensors

  • MCP9700A – Low-power linear active thermistor IC, analog output
  • TC624 - Low-cost single trip point temperature sensor

MOSFET Drivers

  • MCP1404 – 4.5A dual high-speed power MOSFET driver
  • MCP1403 – 4.5A dual high-speed power MOSFET driver