I2C-bus utilized on several meters of nodes describe and applied in this app note from NXP Semiconductors. Link here (PDF) The availability of powerful I2C-bus buffers that drive their I/Os on both sides to a nominal ground or ‘zero offset’ logic level allows the removal of noise introduced into one section of a very large […]
Tag Archives: NXP Semiconductors
App note: Opto-electrical isolation of the I2C-bus (operating the bus between points with different local ground potential)
App note from NXP Semiconductors shows I2C-bus galvanic isolation solution by splitting the bi-directional bus to unidirectional logic signals and passing them through opto-isolator couplers. Link here (PDF) Many systems that can benefit from the advantages of I2C-bus control are not allowed to share any common reference signal (ground) potential. To prevent any chance of […]
App note: Smart battery charger by LPC865 with SMBus interface
App note from NXP Semiconductors on their Arm Cortex-M0+ based low cost MCU LPC865 smart battery charger. Link here (PDF) The application of batteries is everywhere: smartphones, notebook computers, wearable devices, handheld electronic products, smart small appliances, and so on. Information about the state of batteries is important for the user, for example, the battery […]
App note: NVT4557/NVT4558/NVT4858 voltage-level translator layout guideline
App note from NXP Semiconductors on proper board layout guideline for NVT4557/NVT4558/NVT4858 voltage-level translators for optimal operation. Link here (PDF) High performance digital signals on modern microprocessors are designed using advanced CMOS process to take advantage of its low power consumption. However, CMOS logic has very fast edge rates in the range of 1 ns […]
App note: How to Port U8g2 to LPC55(S)6x and support a mono OLED display
App note from NXP Semiconductors helping you to use cheap OLED panels found on Taobao or Amazon to interface with their LPC5500 series micro using U8g2 graphics library. Link here (PDF) The LPC5500 is an Arm® Cortex®-M33 based microcontroller for embedded applications. There are many 128 × 64 resolution OLED panel modules on the market […]
App note: Smart battery charger by LPC845 with SMBus interface
Battery charger using NXP’s LPC845 through SMBus communication. Link here (PDF) Batteries are used everywhere, such as smart phones, notebook computers, wearable devices, handheld electronic products, smart small appliances, etc. Users always want to know the battery temperature, voltage, current, capacity, how long it can be fully charged, and how long the battery will be […]
App note: Low-Power Real-Time algorithm for metering applications
Tested algorithm library from NXP Semiconductors on power metering. Link here (PDF) High accuracy metering is an essential feature of an electronic power meter application because inaccurate metering can result in substantial amounts of lost revenue. Moreover, inaccurate metering can also undesirably result in overcharging to customers. The common sources of metering inaccuracies, or error […]
App note: PN7150 hardware design guide
A hardware design guide using NXP’s PN7150 full featured NFC controller. Link here (PDF) This document is intended to provide an overview on how to integrate the NFC Controller PN7150 from hardware perspective. It presents the different hardware design options offered by the IC and provides guidelines on how to select the most appropriate ones […]
App note: Tire pressure monitor system
NXP Semiconductor’s implementation of Tire pressure monitor (TPM) system. Link here (PDF) The Tire Pressure Monitoring System Reference Design consists of five modules: four tire modules and a receiver module. The tire modules consist of the MPXY80xx, the RF2, a battery, several discrete components, and a printed antenna. The receiver module has the MC33954, the […]
App note: Crystal oscillator troubleshooting guide
App note from NXP Semiconductors dealing with oscillators in microcontrollers. Link here (PDF) Most microcontrollers can use a crystal oscillator as their clock source. Other options include external canned oscillators, resonators, RC oscillators, and internal clocks. The main advantages of a crystal oscillator are frequency accuracy, stability, and low power consumption. However, high reliability is […]
App note: Active cell balancing in battery packs
Cell balancing implementation from NXP Semiconductors. Link here (PDF) Batteries made of multiple cells connected in series are often used as a power source for common electronic devices. In multicell battery chains, small differences between the cells (due to production tolerances or operating conditions) tend to be magnified with each charge or discharge cycle. In […]
App note: How to measure the power consumption of a peripheral
Application note from NXP Semiconductors on MCU peripheral power consumption measurement. Link here (PDF) This Application Note outlines the steps to measure the power consumption of a peripheral and figure out some key points in the measurement. The document takes low-power timer (LPTMR) and LPUART as examples to introduce the method to measure the power […]
App note: TEA1938T GreenChip SMPS control IC
TEA1938T SMPS control IC application note from NXP Semiconductors. Link here (PDF) The TEA1938T is a high-featured low-cost DCM and QR mode flyback converter controller. It provides high efficiency at all power levels and very low no-load power consumption at nominal output voltage in burst mode operation. To minimize ripple, the burst mode uses a […]