Summary of PIC10 TB085 Sample using PIC10F206 with Proteus Simulation
This project implements a compact DC/DC pulse generator using a PIC10F206 simulated in Proteus. It produces a 250 kHz pulse to drive an MCP1630 controller and provides firmware-based soft start, undervoltage lockout, over-temperature shutdown, external shutdown, and automatic fault recovery. The design demonstrates minimal-pin embedded power control and is fully testable within Proteus for educational and practical applications.
Parts used in the PIC10 TB085 Sample using PIC10F206 with Proteus Simulation:
- PIC10F206 microcontroller
- MCP1630 DC/DC controller (external driver)
- External digital temperature sensor (digital output)
- Resistors (passive components)
- Capacitors (passive components)
- Inductor (power stage)
- Diode (power stage)
- MOSFET (power stage)
- Linear regulated supply (2.5V – 5.5V)
- Proteus VSM simulation environment
Introduction
This microcontroller project demonstrates a compact DC/DC power supply pulse generator built around the PIC10F206, simulated entirely in Proteus.
The design focuses on generating a controlled high-frequency pulse signal for a switching regulator while adding intelligent protection features.
Using a simple PIC10 device, the project implements soft start, undervoltage lockout, over-temperature shutdown, and external shutdown control.
It is a strong example of how embedded systems and practical electronics can be combined in a minimal-pin microcontroller project.
This Proteus simulation helps learners understand real-world firmware-driven power control without additional hardware.
How the Project Works (Overview)
The PIC10F206 generates a 250 kHz pulse signal used to drive an external DC/DC controller (MCP1630).
At power-up, the firmware performs a soft-start routine, gradually increasing the pulse output from 0% to full operation over approximately 5 ms.
The system continuously monitors supply voltage and temperature conditions.
If an undervoltage or over-temperature condition is detected, pulse generation is immediately stopped and safely restarted once conditions return to normal.
All logic is handled directly through firmware using GPIO pins and the internal comparator.
Block Diagram / Workflow Explanation
Power-Up Initialization
GPIO direction, comparator configuration, and watchdog timer are initialized.Voltage Check (Comparator Input – GP0)
The internal comparator verifies the scaled supply voltage before allowing startup.Soft Start Pulse Generation
A pulse table gradually increases the number of output pulses, ensuring controlled startup.Normal Operation Loop
Continuous 250 kHz pulses are generated for the MCP1630 controller.Fault Monitoring
Undervoltage detected via comparator output
Over-temperature detected through a digital temperature sensor input (GP1)
Fault Recovery
When faults clear, the firmware restarts the soft-start sequence automatically.
Key Features
Firmware-based soft start control
250 kHz pulse generator using GPIO
Undervoltage lockout using internal comparator
Over-temperature shutdown via external temperature sensor
Automatic restart after fault conditions
Minimal-pin PIC10F206 implementation
Fully testable Proteus simulation
Components Used
PIC10F206 Microcontroller
MCP1630 DC/DC controller (external driver)
External temperature sensor (digital output)
Passive components (resistors, capacitors, inductor)
Diode and MOSFET for power stage
Linear regulated supply (2.5V – 5.5V)
Proteus VSM simulation environment
Applications
DC/DC converter control circuits
Embedded power management systems
Educational microcontroller project for power electronics
Proteus-based embedded systems training
Low-cost firmware-controlled switching regulators
Explanation of the Code (High-Level)
The firmware is written in MPASM for the PIC10F206.
At startup, GPIO pins and the comparator are configured, and the watchdog timer is enabled.
A pulse table controls the soft-start process by gradually increasing the number of output pulses sent to the MCP1630.
During normal operation, the firmware continuously generates pulses while checking for undervoltage and over-temperature conditions.
If a fault is detected, pulse output stops, and the system enters a delay-and-monitor loop.
Once safe conditions return, the firmware automatically restarts the soft-start sequence.
Source Code
* # Name Function *
;* 1 GP0 externally scaled supply voltage *
;* 2 Vss Ground *
;* 3 GP1 digital output of temperature sensor *
;* 4 GP2 250 kHz output for MCP1630 *
;* 5 Vdd +2.5 to 5.5 Volts Power Supply (linear regulator) *
;* 6 GP3 MCLR input for !Shutdown control Proteus Simulation
In Proteus, the PIC10F206 generates a clean 250 kHz pulse output visible at the PWM pin.
During startup, the pulse density increases smoothly due to the firmware-based soft-start table.
When undervoltage or over-temperature conditions are introduced, the pulse output halts immediately and resumes only after safe recovery.
This behavior closely mirrors real-world switching power supply control.
(FAQs)
Conclusion
This PIC10 TB085 sample project demonstrates how a tiny PIC10F206 can reliably control a DC/DC power stage using pure firmware logic.
It highlights essential embedded systems concepts, including soft start, fault protection, and pulse generation.
The Proteus simulation makes it an excellent learning platform for DIY electronics, firmware design, and power control applications.
- Why use a PIC10F206 for this project?
Because it provides a minimal pin count while offering an internal comparator and GPIOs needed for pulse generation and protection features. - Can this project run entirely in Proteus?
Yes, the project is fully simulated in Proteus VSM and demonstrates pulse output, soft-start behavior, and fault responses. - How is soft start implemented without PWM hardware?
Soft start is implemented in firmware via a pulse table that gradually increases the number of output pulses over about 5 ms. - What happens during undervoltage?
The internal comparator detects undervoltage and pulse generation is stopped until the comparator indicates a safe voltage. - How is over-temperature detected?
Over-temperature is detected using an external digital temperature sensor connected to GP1. - Can the pulse frequency be changed?
Yes, the frequency can be adjusted by changing delay loops and pulse timing in the firmware. - Is external shutdown supported?
Yes, external shutdown is supported via the MCLR input configured for active-low shutdown. - Can this design be adapted to other PIC10 devices?
Yes, it can be adapted with minor pin and configuration adjustments to other PIC10 devices.
