DevinToby's Automatic MCH PD Reflow Hotplate
(tindie, git-imuslab, hackster.io, CH554 SDCC)
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A USB-PD powered metal ceramic heater (MCH) based reflow hotplate.
Key Features:
- USB-PD
- MCH
- Fully automatic (and any changes requires reprogramming the IC)
System Info
| Controller | CH552G (Arduino Programmable) |
| Power Input | USB PD 20V 3A (60W / 65W PD power supply recommended |
| Interface | 1 button Press and hold to start |
| Profile Change | reprogram over USB |
| Cooling | no |
Hotplate
| Hotplate Type | MCH (Metal Ceramic Heater) |
| Hotplate Size | 40mm * 40mm (± 1mm) |
| Hotplate Power Consumption | 30..50W |
Temperature Sensor
| Temperature Sensor | 100k 1% Thermistor (example, datasheet) |
| Temperature Sensor (Controller) | ADC on-board MCU (8bit) |
Components
- CH552G
- 8bit MCU (16pin)
- IP2721
- USB-C/PD physical layer IC (datasheet)
- TPS259261
- 12V eFuse protection switch
- AO3400A
- n-channel MOSFET 30V 5.7A 1.4W
Connectors
- 4p (2x2) 100mil "PROG1"
- 2p 100mil "SENSOR"
- 2p screw terminal 5.00mm
- 3p 100mil
ICs Not Shown
Unlisted part
- 2-wire 100k 1% Thermistor
- with 1k at 240° and a 100k NTC at 25° (utils.ino) --> Beta ~4000
![IP2721 schematic]( "IP2721 schematic")
Toby's Automatic MCH PD Reflow Hotplate IP2721 schematic
Solder-Reflow-Plate by AfterEarth
A 12V barrel jack powered PCB hotplate.
Key Features:
- PCB heater
- OLED display
System Info
| Controller | ATmega4809 (Arduino) |
| Power Input | 12V 5A Barrel jack |
| Interface | 2 pushbuttons and OLED |
| Profile Change | pushbuttons (select Zone temperatures) |
| Cooling | no. Temperature is displayed during cooling |
Hotplate
| Hotplate Type | PCB trace resistors |
| Hotplate Size | 70mm * 50mm (± 1mm) |
| Hotplate Power Consumption | ~30W |
Temperature Sensor
| Temperature Sensor | LMT85LP (datasheet) |
| Temperature Sensor (Controller) | ADC on-board MCU (10bit) |
Note: the temperature range of the LMT85LP is limited to 150°C.
Discussions
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