The 15-watt single-coil fixed-frequency wireless charging transmitter reference design features the WCT10xx transmit controller IC and integrates all the features required for a Wireless Power Consortium (WPC) Qi-compliant wireless power transmitter design.
Supercapacitors are increasingly being used in a number of applications in electric vehicles, transportation equipment, industrial machinery and utility grids. In the MAXREFDES1215, a supercapacitor-based energy harvester is demonstrated using the MAX17220. The circuit uses a supercapacitor to provide backup energy. The first stage of the circuit charges a supercapacitor, and the second stage of the circuit regulates the voltage from the supercapacitor to supply various sensors with a steady output voltage. In this system, the MAX17220 is used for regulating the output voltage from the supercapacitor.
The TIDEP0066 reference design uses TI's Embedded Speech Recognition (TIesr) library to highlight the speech recognition capabilities of the C5535 and C5545 DSP devices; and based on successful keyword collection, indicates how to run speech to print pre-programmed keywords on the C5535eZdsp OLED screen Trigger example. This design also describes the steps to customize trigger words.
The MAXREFDES1123 is a compact boost power-supply design for high-voltage applications with low current requirements where extremely low cost and small size are top priorities.
This document details the MAXREFDES113# subsystem reference design, a 17V to 36V input, 12V output, flyback isolated power supply capable of 20W. Design files and test results are included. Hardware is 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. The MAX17690 eliminates the need for an optocoupler or auxiliary transformer winding and achieves ±5% output voltage regulation over line, load, and temperature variations.
This development platform targets Ethernet/IP slave device communications, enabling designers to implement the Ethernet/IP communications standard in multiple industrial automation devices. It enables low-footprint designs with minimal external components and best-in-class low-power performance.
1.44 W Non-Isolated Buck Converter Using LinkSwitch-TN2 900 V (LNK3294G/P)
This application note presents a reference design for a nonisolated LED driver intended to operate directly from a 400V DC input. The design drives a string of 27 WLEDs (white LEDs) or, optionally, 6 amber LEDs at 400mA. The topology is a discontinuous flyback with a transformer. The MAX16801 HB (high brightness) LED controller is featured.
The TIDA-00786 is a small size brushed DC motor controller with fixed 100% duty cycle speed input and variable current regulation. The DRV8871's integrated current sensing capability enables the design to utilize standard potentiometers, allowing the user to quickly change current limit levels in motors powered by 12 to 24V inputs.
Maxim's Power Amplifier Biasing (MAXREFDES39#) features a PA Bias circuit with the flexible Programmable Mixed Signal I/O (PIXI™) product, the MAX11300. The 2-stage amplifier design biases a 15W, LDMOS PA implemented with unprecedented simplicity, and is capable of biasing many existing PAs. Design files are available and boards are available for purchase.
The evaluation board supports the MC33810EK automotive engine control IC for injectors, solenoids, lights, and relays.
The FRDM-HB2001-EVM evaluation kit allows users to practice using all features of the MC33HB2001 H-bridge device with FRDM-KL25z and SPIGen software.
The FDC2214 proximity and capacitive sensing design demonstrates how to use TI's capacitive sensing technology to sense and detect the presence of various objects. This design is a complete hardware and firmware solution. The firmware processes data from a proximity sensor and two capacitive touch buttons via the FDC2214 to determine whether an object is within the target sensing area. A dedicated colored LED lights up whenever the device detects an object in close proximity to the board or detects a button press. This design is powered by one AA battery.
The PMP5242 reference design uses the UCC28810 in a single-stage, PFC-SEPIC configuration to drive a 22W LED load. This supply can operate from an input ranging from 85VAC up to 265VAC. It is capable of driving LED strings from 156V up to 208V at a fixed current of 110mA with efficiency over 89%.
The MAXREFDES1227 is a miniature 12V output isolated power supply that can deliver up to 2A load current. The design employs the MAX17596 peak-current-mode controller in discontinuous-conduction mode (DCM) flyback topology running at 125kHz. The input voltage range of MAX17596 is 4.5V to 36V; however, an extra bias winding from the transformer is used to power the controller. This allows an input operating voltage of up to 60V for this design.
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