Single PWM input brushless DC motor control TI reference design

This design is a sensored three-phase brushless DC motor controller that uses a single PWM input to control speed and three active-high Hall sensors to detect rotor position. The DRV8305's integrated communication table simplifies the microcontroller firmware required for correct commutation. The DRV8305 automatically handles dead time insertion and gate drive current control, both of which are adjustable through the driver SPI interface.

Schematic PCB

syzygy-pmod: SYZYGY to PMOD adapter

SYZYGY is an FPGA extension standard for medium to high speed interfaces. This design is a splitter for 4x PMOD connectors. All 32 I/O signals from the SYZYGY connector are brought out. 8 on each PMOD.

Schematic PCB

MAXREFDES1150: Smart medicine bottle

The MAXREFDES1150 is Maxim's smart pill bottle design for medical and broad IoT applications.

Schematic PCB

MAXREFDES1180: -124V/100mA, negative output supply, using MAX17501

The MAXREFDES1180 is centered around the MAX17501 ultra small, high-efficiency, high-voltage, synchronous stepdown DC-DC converter with integrated MOSFETs. This design provides a -12V output and up to 150mA of load current with an input voltage range of 4.5V to 5.5V. Unlike a traditional design, this reference design is configured to work in an inverting buck-boost topology to produce negative output voltage from positive input voltage.

Battery tester reference design for high current applications

Li-Ion battery formation and electrical testing require accurate voltage and current control, usually to better than ±0.05% over the specified temperature range.  This reference design proposes a solution for high-current (up to 50 A) battery tester applications supporting input (bus) voltages from 8 V–16 V and output load (battery) voltages from 0V–5V. The design utilizes an integrated multi-phase bidirectional controller, LM5170, combined with a high precisiondata converters and instrumentation amplifiers to achieve charge and discharge accuracies of 0.01% full scale. To maximize battery capacity and minimize battery formation time, the design uses highly-accurate constant current (CC) and constant voltage (CV) calibration loops with a simplified interface. All key design theories are described guiding users through the part selection process and optimization. Finally, schematic, board layout, hardware testing, and results are also presented.

Schematic PCB

USB Type-C Plug to USB Type-A Socket SS (SuperSpeed) MUX Reference Design with UFP Controller

TIDA-00891 is designed to evaluate the HD3SS3220 device for UFP implementation. This reference design also serves as a hardware reference design for any implementation using the HD3SS3220 with a USB-C™ connector. Reference design files are available upon request to assist in PCB design using the HD3SS3220. This design provides layout files to guide you through the routing/location rules schematic to implement the TUSB321A. This reference design provides an onboard USB Type-A plug to connect to legacy USB systems. Please note that this reference design may contain test components that are intended for evaluation and are not suitable for production.

Schematic PCB

MAXREFDES89#: MAX14871 full-bridge DC motor driver MBED platform

MAXREFDES89# is an mbed®-compatible shield for the rapid development of brushed DC motor applications. The shield contains four MAX14871 full-bridge DC motor drivers for driving up to 4 motors. A MAX17501 DC-DC converter allows the system to operate from a single 7 to 36VDC power supply. Four MAX4704 4:1 multiplexers permit setting the current regulation mode of the MAX14871, while two MAX5387 digital potentiometers provide the ability to set the motor current limit. A MAX7300 GPIO expander supports interfacing each motor driver circuit to the mbed enabled microcontroller platform.

Schematic PCB

LED driver with phase-cut dimming, 8.6 W

8-Channel Isolated High-Voltage Analog Input Module Reference Design Using ISOW7841

The TIDA-01333 Isolated High Voltage Analog Input Module Reference Design has eight channels, each supporting voltage and current measurements. In addition, 4 of the channels support common-mode voltages up to ±160V. The device provides isolation of the +5V line and serial peripheral interface (SPI) communications within a single chip via the ISOW7841. The design uses the ADS8681, a 16-bit analog-to-digital converter (ADC) that can handle input voltages up to ±12.288V. This eliminates the need for any preprocessing of standard input voltages found in industry.

Schematic PCB

RDR-641 - 40 W variable output (3 V to 8 V, 5 A; 8 V - 20 V constant supply) power supply for PIC16F18325 microcontroller using InnoSwitch3-Pro and Microchip

This document is an engineering report describing a 5 A CV/CC charger (3 V to 8 V range), which switches to constant power in the 8 V to 20 V range using the InnoSwitch3-Pro and Microchip’s PIC16F18325 microcontroller. PIC16F18325 controls the InnoSwitch3-Pro via an I2C interface, programming its COMMAND and telemetry registers. This design shows the high power density and efficiency that is possible from the high level of integration in the InnoSwitch3-Pro controller. The report contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data.

Schematic PCB

DER-338 - 23 W, isolated, power factor corrected (PF >0.98), LED driver for T8 lamps

Low Line Only Low Profile T8, Isolated 23 W, Power Factor Corrected (PF >0.98), LED Driver Using LYTSwitchTM LYT4215E

Schematic PCB

Portable devices require high-performance battery chargers

Three techniques for charging lithium-ion (Li+) batteries are described. Linear, switch-mode, and constant-current pulse circuits are shown for each charging method.

TEA1936XDBSZ02: QC4.0/4.0 + 18W mobile charger

The QC4.0/4.0+ 18W Mobile Charger enables the design of power supplies featuring low standby power with the output voltage in full regulation, very high-efficiency and high-reliability. The NXP® chipset used is targeting mobile and notebook power supplies with power requirements up to 100W. Supplies can be designed easily and with a minimum number of external components.

Schematic PCB

High-fidelity headphone amplifier reference design for current-output audio DAC

This TI precision verification design circuit converts the differential current output of an audio DAC into a single-ended voltage that can drive low-impedance headphones. This design achieves the high-fidelity performance levels currently being promoted in cell phones and mobile audio players.

Schematic PCB

FRDM33772BTPLEVB: MC33772 evaluation board with isolated daisy chain communication

6-Channel Li-Ion Battery Controller MC33772 Evaluation Board Targets Automotive and Industrial Applications with Isolated Daisy-Chain Communication

CN0285

Wideband Low Error Vector Magnitude (EVM) Direct Conversion Transmitter

Schematic PCB

MAXREFDES1043: SpO2 monitoring solution based on MAX30102

The MAXREFDES1043 is designed for SpO₂ measurements based on Maxim’s new-generation biosensor—the MAX30102.

Schematic PCB

CN0175

Low-cost, 8-channel, simultaneous sampling data acquisition system with 84 dB SNR and excellent channel-to-channel matching

Schematic PCB

gpdi-serdes: GPDI using serdes

SYZYGY is an FPGA extension standard for medium to high speed interfaces. This design splits the video output to a regular digital display and also supports input from the digital display. It connects to the SERDES via a SYZYGY-TXR connector. Would love to be able to test the 5Gbps output of high resolution GPDI.

Schematic PCB

Avalanche Photodiode (APD) Bias Supply and Current Monitoring

This reference design presents a circuit for addressing the power-supply and current-monitoring requirements of APD biasing applications. Based on the MAX15031 DC-DC converter, the application circuit provides a 70V, 4mA, DC-DC power converter with a 2.7V to 11V input supply-voltage range.