Many devices with rechargeable batteries use USB power to recharge the batteries while they are connected. This application note describes the power available from USB and how it can be used to charge batteries, including circuits and some hints.
A high-voltage (30 V) DAC powered by a low-voltage (3 V) supply generates the tuning signal for the antenna and filter
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-medium isolated DC-DC power-conversion applications. However, the use of an optocoupler or an auxiliary winding on the flyback transformer for voltage feedback across the isolation barrier increases the number of components and design complexity. The MAX17690 eliminates the need for an optocoupler or auxiliary transformer winding and achieves ±5% output voltage regulation over line, load, and temperature variations.
The MAX17681/MAX17681A is a high-voltage, highefficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage .
The Palo Verde reference design (MAXREFDES33#) is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over a 4.5V to 60V input voltage range and delivering output current up to 300mA at 3.3V . Test results and hardware files provide complete documentation for designs. The board is also available for purchase.
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-medium isolated DC-DC power-conversion applications. However, the use of an optocoupler or an auxiliary winding on the flyback transformer for voltage feedback across the isolation barrier increases the number of components and design complexity.
7 W Wide-Range Input, Dual Output, Non-Isolated Flyback Converter Using LinkSwitch-XT2 900 V (LNK3696P)
Power over Ethernet (PoE) is a technology that allows network cables to deliver power to a powered device (PD) through power-sourcing equipment (PSE) or midspan, and has many advantages over traditional methods of delivering power.
This display reference design is created for a variety of ultra-portable display applications in the consumer, wearables, industrial, medical and Internet of Things (IoT) markets. This design includes the DLP2000 chipset, which consists of the DLP2000 .2 nHD DMD, DLPC2607 display controller, and DLPA1000 PMIC/LED driver. This small form factor reference design works with production-ready optical engines and low-cost applications processors supporting 8/16/24-bit RGB parallel video interfaces.
To provide system designers with a new cost-effective and simple alternative solution for high-precision temperature measurement, this reference design introduces a new ultra-small 2-pin digital output IC temperature sensor with a single line pulse counting interface that improves reliability and greatly simplifies the design of electrically isolated architectures to send power and unidirectional data through the same low-profile transformer and remote operation. Additionally, error budget calculations are simpler because there are fewer error sources. Cost budget, accuracy, size, and simplicity of connection to other circuit components are major factors to consider when selecting a sensor to perform the job, and this reference design system can be of great assistance in meeting these requirements. This design has a maximum measurement error of less than 0.25°C over the -50°C to 150°C temperature range, provides 400VRMS of functional isolation, and is pre-certified to IEC61000-4-4 to significantly reduce the cost of high-accuracy temperature measurement systems Development design time.
TIDA-00556 is a low-power, space-saving "transport mode" solution targeted at wearable devices and other small portable electronics that can be implemented using simple, low-cost load switches.
Two outputs: 1: 0-30V/4A 2: 5V/1.5A (fixed output) Voltage resolution 0.458mV, current resolution 0.076mA Voltage step 0.0073V, the actual 0.1V step adjustment reset circuit is Both 51 and AVR are compatible. You can't solder all four original components. You can solder the reset circuit according to which chip you use!
DI-198 - Wide Range DVD Player Multiple Output Power Supply Without Need for Optocoupler
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