150V synchronous step-down DC/DC includes surge protection

Features Wide VIN Range: 4V to 140V (150V Abs Max) Wide Output Voltage Range: 0.8V to 60V Adjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE) Low Operating IQ: 40μA (Shutdown = 10μA) 100% Duty Cycle Operation No External Bootstrap Diode Required Selectable Gate Drive UVLO Thresholds Onboard LDO or External NMOS LDO for DRVCC EXTVCC LDO Powers Drivers from VOUT Phase-Lockable Frequency (75kHz to 850kHz) Prog ...

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Microchip’s first ARM processor with cryptographic engine

In Production The CEC1302 incorporates a high-performance 32-bit ARM® Cortex®-M4 embedded microcontroller with 128 Kilobytes of SRAM and 32 Kilobytes of Boot ROM. It communicates with the system host using the I2C bus. The CEC1302 has two SPI memory interfaces that allow the EC to read its code from external SPI flash memory: private SPI and/or shared SPI. The Shared SPI interface allows for EC code to be s ...

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Using USB Type-C on hobbyist projects

The new Type-C USB connector is the latest addition to the USB connector standards. It offers reversible plugs, direction independent cables, USB3.1 speeds, and 3A charging in a connector only a little bigger than the USB 2.0 MicroB connector. In order to add these capabilities the plugs and connectors have additional configuration pins to allow devices to negotiate their state. Supporting the configuration ...

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Getting Started with OPENOCD Using FT2232H Adapter for SWD Debugging

Old MCUs from vendors like ATMEL and MICROCHIP, like the PIC16F and Atmega family, tend to have a special programming interface to program internal flash. For example, Atmega used SPI pins (MISO, MOSI, SCK) and PIC used two pins (PGC, PGD)— one as a clock and another as a bi-directional data line. New MCUs, especially with an ARM core, use JTAG/SWD as a programming/debugging interface. What is the differenc ...

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A Smart Night Lamp for Kids

Few weeks ago I heard my nephew (aged 7) complaining of the dark at night. Basically he was afraid So I decided to put knowledge into practice and build a night lamp for kids. Since the project was intended for kids, I thought of making the lamp change color every now and then. It should also be sensitive to light so that if the room is well lit, the lamp would remain off. For this project Arduino Uno was u ...

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Building a PIN Diode Geiger Counter

Exactly 30 years ago a great disaster struck the region of Chernobyl: a nuclear accident occurred that released a large quantity of radioactive particles into the atmosphere. And it is only five years ago that, with the Fukushima Daiichi nuclear disaster, a second similar catastrophic event has taken place. These anniversaries did not directly let me build a PIN Photodiode based Geiger Counter, it is more o ...

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Researchers develop LED covering full visible light spectrum

LED and OLED lighting, which is generally called solid-state lighting (SSL), is becoming more common as the next generation lighting. Evaluations of total luminous flux (a performance index for lighting) and color are important for SSL, and to evaluate those values, it is indispensable to measure the light intensity of each wavelength accurately based on spectral measurement. For accurate spectral measureme ...

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Latching power switch uses momentary-action pushbutton

Most inexpensive pushbutton switches, particularly pc-board-mounting and membrane types, have momentary action. Latching types are often larger and relatively expensive, and they frequently are unavailable in the style you'd like to use. You can thus have a problem if you need a small, inexpensive on/off switch for latching power to a load. The circuit in Figure 1 shows how you can use a simple, momentary-a ...

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Single transistor provides short-circuit protection

In certain dc/dc-converter applications, on-chip, cycle-by-cycle current limit may be insufficient protection to prevent a failure during a short circuit. A nonsynchronous boost converter provides a direct path from the input to the short circuit through the inductor and the catch diode. Regardless of current-limit protection in the IC, when a short circuit exists in the load, extremely high currents that f ...

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Sensing current on the high side

As EDN's Design Ideas editor, I see a range of design submissions, from good, to not so good. A recent DI I turned down for several reasons included a high-side current sense circuit with implementation problems. This got me thinking about the different ways to accomplish current sensing on a voltage rail. At their heart, the majority of DC current sense circuits start with a resistance in a supply line (th ...

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