CoolMOS™ CE 16W single-ended cap T8 lighting demonstration board in SOT-223 package

A SOT-223 packaged CoolMOS™ CE superjunction MOSFET (IPN60R3K4CE) (600V, 3.4Ω) is used as the main switch for this single-ended cap T8 LED lamp driver board with high line output and 16W/66V output converter. The converter uses ICL8201 (SOT23-6-1) to achieve average current controlled non-isolated single-stage buck topology in a cascade structure LED driver. Unique features of this reference design include single-stage design for high efficiency and power factor, single choke (no auxiliary winding) critical conduction operation, true regulated output current over a wide output voltage range, and excellent EMI performance and various protection modes for high reliability and small size that easily fits into a standard T8 LED lamp single-ended cap.

XDPL8105 40W Reference Design

The XDPL8105 40W reference design is a digital ground configured LED driver with a universal input of 90-305 V AC, a wide output load range of 16-45VDC and isolated 0-10V dimming based on a CDM10V dimming IC. The power stage uses IPD80R1K4CE, a 900mOhm CoolMOS™ CE power MOSFET. 

42 W high power factor constant voltage output flyback converter based on ICL8810

REF_ICL8810_LED_42W_PSR This 42 W reference design uses Infineon's high power factor flyback controller ICL8810. The evaluation board is a constant voltage (CV) secondary side regulation (SSR) system designed for use with a constant current (CC) converter for LED lighting applications.

43 W high power factor constant voltage output flyback converter based on ICL8820

REF_ICL8820_LED_43W_JT This 43 W reference design uses Infineon's high power factor flyback controller ICL8820. The evaluation board is a constant voltage (CV) secondary side regulation (SSR) system designed for use with a constant current (CC) converter for LED lighting applications.

15W 5 V USB Adapter Reference Design Board Using Quasi-Resonant PWM IC ICE2QS03G and CoolMOS IPS65R 1 K5CE

This is a 15W 5V USB adapter reference design board using quasi-resonant PWM IC ICE2QS03G (DSO-8) with CoolMOS™ IPS65R1K5CE (IPAK SL) and secondary side synchronous rectification with OptiMOS™ BSZ100N06LS3G (S3O8, 3x3 mm style SuperSO8) IR1161 (5-pin SOT-23). Designed for high-reliability systems, this reference USB adapter board features a compact form factor, high efficiency, low standby power, various protection methods, and passes conductive electromagnetic interference, ESD, and lightning shock wave testing. Customers only need to make slight changes to this board, and it can be used for production after final confirmation.

43 W high power factor constant voltage output flyback converter based on ICL8810

REF_ICL8810_LED_43W_BM This 43 W reference design uses Infineon's high power factor flyback controller ICL8810. The evaluation board is a constant voltage (CV) secondary side regulation (SSR) system designed for use with a constant current (CC) converter for LED lighting applications. Two-stage topologies are becoming increasingly popular due to the easy scalability of primary-side power and secondary-side characteristics. The REF_ICL8810_LED_43W_BM solution features a plug-and-play design and can be used with the secondary-side DC/DC evaluation board. As a default, the reference design board is equipped with a depletion mode MOSFET BSS126I based startup circuit on a small adapter board. This setup will significantly reduce standby losses. If low standby power consumption is not required, the startup circuit can be changed to a resistive startup design. This reference design comes with two conditioning circuits. Both are plug-and-play solutions, but at least one circuit must be connected to the motherboard. There is a cost trade-off between the two evaluation boards; the TL431 evaluation board is lower cost and has good standby performance, while the op amp board exhibits excellent overall performance at the 30 mW power level. With its benchmark power factor correction and total harmonic distortion performance at full and light load conditions, the ICL8800 supports window driver and platform designs. In addition, the IC combines excellent efficiency with low EMI characteristics without compromising light quality.

43 W high power factor constant voltage output flyback converter based on ICL8800

REF_ICL8800_LED_43W This 43 W reference design uses Infineon's high power factor flyback controller ICL8800. The evaluation board is a constant voltage (CV) secondary side regulation (SSR) system designed for use with a constant current (CC) converter for LED lighting applications. Two-stage topologies are becoming increasingly popular due to the easy scalability of primary-side power and secondary-side characteristics. The REF_ICL8800_LED_43W solution features a plug-and-play design and can be used with the secondary-side DC/DC evaluation board. As a default, the reference design board is equipped with a depletion mode MOSFET BSS126I based startup circuit on a small adapter board. This setup will significantly reduce standby losses. If low standby power consumption is not required, the startup circuit can be changed to a resistive startup design. This reference design comes with two conditioning circuits. Both are plug-and-play solutions, but at least one circuit must be connected to the motherboard. There is a cost trade-off between the two evaluation boards; the TL431 evaluation board is lower cost and has good standby performance, while the op amp board exhibits excellent overall performance at the 30 mW power level.

8W 12V reference design using ICE5AR4770BZS

This 8W auxiliary SMPS reference design operates over a wide input range and is considered for indoor residential air conditioning applications. It uses the new ICE5AR4770BZSPWM fixed frequency CoolSET™ with a 700V integrated MOSFET in a DIP-7 package.

Schematic PCB

OpenHeat: open source intelligent heating platform

A practical heating table for PCB reflow soldering. It is quite cool. It may be the most beautiful and functional heating table on the market. Parameters: The hardware is based on the ESP32PICO-D4 chip, the input power is 24V/10A, the maximum power is 200W, and the heating temperature is up to 300°C. It has Bluetooth function. If I have time later, I will develop a mobile APP to set the temperature rise curve.

Schematic PCB

DIY Tactile Input Knob: BLDC Motor + Round LCD

SmartKnob is an open source input device with software-configurable stops and virtual locators. The brushless gimbal motor is paired with a magnetic encoder to provide closed-loop torque feedback control, allowing the feel of the detent and stop to be dynamically created and adjusted.

Schematic PCB

Super mini & low-cost Linux development board based on Allwinner F1C200s (produced by Zhihuijun)

The cost of the board should be less than 50RMB, and it provides a lot of information, which is very suitable for novices to use as a development board to learn Linux.

Schematic PCB

GPSMUX: GPS Multiplexer

This board and associated firmware can be used to switch between two serial NMEA GPS feeds based on repair status. The resulting feed is transmitted over a third serial line with RS232 levels. This board is designed around the Cypress PSoC CY8C27143. The PCB is designed using KiCAD.

Schematic PCB

Arduino dual combination: based on iMX8 and STM32H747 development boards

Portenta X8 is a powerful industrial-grade SOM with a pre-installed Linux operating system onboard and can run device-independent software thanks to its modular container architecture. Securely perform OS/application OTA updates with onboard Wi-Fi/Bluetooth® Low Energy connectivity. It is basically two industrial products combined into one, with a power of no less than 9 cores. Utilize the Arduino environment to perform real-time tasks, while Linux handles high-performance processing. Portenta X8 features NXP® i.MX 8M Mini Cortex®-A53 quad-core up to 1.8GHz per core + 1x Cortex®-M4 up to 400MHz, and STMicroelectronics STM32H747 dual-core Cortex®-M7 up to 480Mhz +M4 32-bit Arm® MCU, up to 240MHz.

Schematic PCB

Simple 78K/V850/LPC programmer

In early 2005, NEC Electronics launched small-pin-count microcontrollers such as PIC/AVR based on the 78K0S architecture. The 78K architecture has a register set similar to the i8085 and additional bit manipulation instructions. It is said to be a classic architecture, but the memory organization is simpler than PIC/AVR. There are various devices with dedicated peripherals, and the 78K series occupies a considerable share of industrial equipment. In the early days, only OTP/Mask products were available, so they were not popular among electronic crafts. However, the small pin count 78K series with flash memory is getting some attention from Japanese microcontroller geeks. Powerful IDEs (compilers, assemblers, simulators, etc.) are also provided for free. I built a very simple 78K0S flash programming adapter for these devices. Additionally, I built a universal programming adapter for V850ES, LPCxxxx, STM32F, etc.

Schematic PCB

Line voltage frequency monitor

The author noticed that the AC line frequency changes in spans of 0.4 Hz and periods of several minutes, so I wanted to examine long-term changes in AC line frequency and voltage. This is a project to build a line voltage frequency monitor. It is not a complete instrument but a simple measurement adapter designed to be embedded in some measurement system with a PC or microcontroller.

Schematic PCB

Surface potentiometer: detects how much static electricity the human body carries

During the dry season we often get electrocuted by metal objects, especially door handles. This is due to the charged static electricity in the human body. Any object can be charged, and often objects have electrical potentials of several thousand volts or more. Static electricity often causes malfunction or damage to electronic equipment. I've always wanted to know how much static electricity is carried in an object or human body, so I made a surface potentiometer to measure the potential of a charged object.

Schematic PCB

Distributed greenhouse management system based on stm32

This design mainly explains the circuit and software design of the node equipment, coordinator equipment and gateway equipment in the greenhouse, completes the front-end and back-end interaction between the web page and the WeChat applet, and completes the data transmission test and communication distance test.

Schematic PCB

Flipper Zero: an open source geek multi-function tool based on STM32W55B

Flipper Zero is a portable multi-tool designed for developers and geeks with a toy-like body. It enjoys exploring digital content such as radio protocols, access control systems, hardware, and more. It's completely open source and customizable, so you can extend it in any way you like.

Schematic PCB

syzygy-txr-breakout: SYZYGY TXR4 to SMA connector

All 12 I/O pins of this design are broken out to 0.1" headers. All 4 TX/RX channels and the reference clock are broken out to SMA connections.

Schematic PCB

syzygy-sgmii: Breakout board for SGMII Gigabit Ethernet PHY DP83867C

This design is a breakout board for SGMII Gigabit Ethernet PHY DP83867C. It connects to SERDES via a SYZYGY-TXR connector to test and evaluate Ethernet over 1.25Gbps serial channels. 2 channels are used and CDR is required on the RX path. Compared to RGMII, SGMII significantly reduces the number of signals required for routing.

Schematic PCB