Download The LIN (Local Interconnect Network) is a cost-effective

Point Of Load Module
Larger system distributed systems for telecommunications and computer networks typically
employ a distributed power system which consists of an intermediate bus voltage, between 24
and 48 volts, which is then translated into the lower supply voltages where they are needed.
This is typically done to reduce I2R losses in the distribution system. POL converters are also
typically isolated to prevent grounding problems as well. Microchip offers a selection of switch
mode converters chips that can be implemented in a typical POL configuration, there are also
a selection of microcontrollers with peripherals which can be used in POL designs.
Refer to the applications notes and Controls section below to learn more.
Application Notes
AN258 Building the PICkit™ 1 Flash Developers Kit
This application note includes a digital switching power supply built around a
software PID feedback loop
AN1025 Converting a 5.0V Supply Rail to a Regulated 3.0V
This application note is intended to provide the system designer with an
overview of different options that could be used to down convert an existing
5.0V system rail to a regulated 3.0V.
TB053 Generating High Voltages with the PIC16C782
This technical brief demonstrates a simple 300VDC+ switching power supply
based on the all-in-one microcontroller, PIC16C782.
TB085 Simple Circuit to Drive PWM Generators
This technical brief discusses the use of simple microcontrollers as pulse
generators and controls for PWM pulse generator chips.
TB081 Soft Start Microcontroller for SMPS
This technical brief discusses the use of a simple microcontroller as a Softstart
circuit for switch mode regulators.
AN874 - Buck Configuration High LED Driver
This application note demonstrates a high current drive built out of a simple
voltage comparator using switch mode techniques.
AN216 - DC/DC Converter Controller Using a PICmicro® Microcontroller
This application note demonstrates the design of a pulse skipping switch mode
power supply design based on a simple microcontroller with hardware PWM
and 2 voltage comparators.
Development Tools
Mindi™ Microchip Analog Simulation tool
Web based Battery and Power simulation tool.
PICDEM MSC1 demo board, based on the PIC16C781/782
This is a general purpose demo board for the PIC16C781/782 which contains a
2-channel analog feedback PWM, voltage comparators, op amps, and an 8-bit
DAC
PICDEM MSC1 Switch Mode Power Supply daughter board for
demonstrating Level 2 and 3 microcontroller integration
This daughter board for board above, implements boost, buck, buck-boost,
and inverting buck-boost topology power supplies using the peripherals within
the PIC16C781/782
Future developments
A 50W 1/8th brick Reference design using the PIC16F684 and MCP1630
This reference design demonstrates how a simple 14pin microcontroller with a
PWM module can be used to control a traditional switch mode power supply
design.
A 75W 1/8th brick Reference design using the PIC16F785
This reference design demonstrates a simple control of a switch mode power
supply design, using a microcontroller with multiple built-in mixed signal
peripherals.
A Low Cost AC-DC switcher design using the PIC16F684
This reference design demonstrates a simple AC to DC design with active
power factor correction.