Preface
Isolation circuits are an important electronic technique that ensures signal integrity and system protection. Through the isolation circuit, it can effectively prevent electrical interference and magnetic signal interference, reduce the influence of the external environment on the signal, and protect the electronic equipment from the interference and damage of the external environment. In the fields of consumer electronics and medical care, industrial control, and communications, isolation circuits play an irreplaceable role, providing an important guarantee for the stable operation of electronic equipment and systems.
Optocoupler isolation is the most widely used in switching power supplies, but optocoupler isolation has the shortcomings of poor common-mode interference suppression ability, insufficient isolation performance and reliability, long transmission delay, and high driver loss, which is difficult to meet the needs of today's switching power supply with increasing power. Therefore, the introduction of digital isolation chips can build efficient isolation circuits with low losses.
The application of digital isolation chip in outdoor power supply
In order to help readers and friends understand the application of digital isolation chips, Charging Head Network has sorted out the recent disassembly cases of built-in digital isolation chips for your reference. Some of the parameters of several chips appearing in the article are shown in the figure, and the following editor will give you a detailed introduction.
Anker PowerHouse 767 - 2048Wh | 2300W氮化镓户外电源
Anker's power station is designed with a trolley case and is equipped with silent wheels and carry handles for easy daily handling. The outdoor power station has a built-in 2048Wh lithium iron phosphate battery, which supports 2300W inverter output and 2200W charging input, and supports solar panel charging input at the same time, and is equipped with an extended battery interface, which can additionally expand the capacity of 2048Wh to meet the needs of long-term use.
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拆解报告：Anker PowerHouse 767 - 2048Wh | 2300W氮化镓户外电源
Built-in digital isolation chip case
Rongpai π122U31
Rongpai Semiconductor π122U31 is a 3.0kVrms isolation voltage 150kbps dual-channel digital isolator, while built-in 2 reverse channels, with high anti-interference ability to radiated and conducted noise, the chip supports 3.0V-5.5V working voltage, surge withstand voltage 5000Vpk, and supports 3.0V-5.5V signal level translation, providing SOIC-8, SOI-16 package form.
Aopeng 600W portable power station R600
This outdoor power station has a built-in 299Wh lithium iron phosphate battery with a built-in bidirectional inverter, supports 600W output power, and supports 1200W peak output power. The power station supports UPS function, which can be switched to power supply within 15ms. The power station supports AC input charging and solar charging, and is equipped with two USB-A and two USB-C ports, the USB-C port supports 100W fast charging output, and the USB-A port supports 18W fast charging output.
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Teardown report: Aopeng 600W portable outdoor power station R600
Built-in digital isolation chip case
川土微CA-IS3721HS
Chuantu CA-IS3721HS is a low-loss bidirectional single-channel digital isolation chip, providing SOIC8, SOIC16 and other packaging forms, supporting up to 150Mbps transmission rate. When isolating CMOS digital I/O, CA-IS3721HS devices provide high electromagnetic immunity and low emissions. And it has a Schmitt trigger input for high noise immunity. The logic input and output buffers for each isolated channel are isolated by a silica (SiO2) insulated gate.
Storage Bit 1200W Portable Power Station A1000
The A1000 power station has a built-in 1021Wh blade power battery, and the built-in inverter supports 1200W output power, with a peak output power of 2400W. The power station supports solar panel charging, USB-C charging and adapter charging. The USB-C port supports 100W bidirectional charging, and the USB-A port supports 18W fast charging, which can be used for charging mobile phones and laptops.
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Teardown Report: Stored Bit 1200W Portable Power Station A1000
Built-in digital isolation chip case
Rongpai π121U31
Rongpai Semiconductor π121U31 is also a 3.0kVrms isolation voltage 150kbps dual-channel digital isolator, while building 1 reverse channel, with high anti-interference ability to radiated and conducted noise, the chip supports 3.0V-5.5V working voltage, and supports 3.0V-5.5V signal level translation, providing SOIC-8, SOI-16 package form.
Electric Xiaoer 1000W outdoor power supply 1000Pro
The 1000Pro has a built-in 1002Wh battery, a built-in bidirectional inverter that supports 1000W output power, and supports 2000W peak output power. And with AC direct input charging and solar charging, it can fully charge the outdoor power station in 1.8 hours. The 1000Pro outdoor power station also has USB-C and USB-A fast charging, USB-C supports 100W fast charging output, USB-A supports 18W fast charging output, and DC car charging interface supports 12V10A output to meet the outdoor power needs of a variety of devices.
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Dismantling report: electric small two 1000W outdoor power supply 1000Pro
Built-in digital isolation chip case
Rongpai π131S61R
Rongpai Semiconductor π131S61R is a 5.0kVrms isolation voltage 2Mbps three-channel digital isolator, while a built-in reverse channel, with high anti-interference ability to radiated and conducted noise, the chip supports 2.5V~5.5V working voltage, surge withstand voltage 8000Vpk, operating temperature range of -40°C~125°C, providing SSOW-10 package form.
Electric Xiaoer Outdoor Power Station 1000 Pro 2
The new generation of electric power station 1000 Pro 2 has made major upgrades in many aspects such as charging speed, output power, safety and durability. The three charging methods of mains, solar power and on-board car charger allow users to recharge with peace of mind wherever they go, and the higher AC inverter output power makes it not a problem to use on-board refrigerators, electric kettles, frying pans and other equipment. In addition, it is equipped with a variety of DC output ports to meet the charging needs of laptops and mobile phones. The new upgrade brings a better experience to users' outdoor recreation, outdoor operation and emergency backup and other power consumption scenarios.
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The new generation of electric Xiaoer outdoor power station 1000 Pro 2 disassembly: new safe fast charging technology, fine workmanship and reliable quality
Built-in digital isolation chip case
NOVOSENSE NIRS21N1D
NIRS21N1D dual-channel digital isolators. The device is UL1577 certified and supports 3kVrms insulation withstand voltage at the same time
High electromagnetic immunity and low power consumption. NIRS21N1D data rates up to 500kbps and common-mode transient immunity (CMTI) up to 100kV/us. The NIRS2x devices provide a digital channel direction configuration and a default output level configuration.
NIRS21N1D wide supply voltage allows for direct connection to most digital interfaces, easy level translation, and is available in an SOP8 package.
High Energy Man 1200W Portable Outdoor Power Station
This AFT1000 outdoor power supply is designed with an aluminum alloy shell, which is beautiful and durable. There are carrying handles on both sides for easy handling, and a wireless charging area on the top for easy mobile phone charging. AC output sockets and input sockets are installed on the side of the fuselage, and there are USB-C and USB-A ports, as well as a ventilation grille for internal heat dissipation.
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Teardown report: High Energy Man 1200W Portable Outdoor Power Station
Built-in digital isolation chip case
NOVOSENSE NSi8242
The NSi8262 is a highly reliable six-channel digital isolator. This series of products has passed UL1577 safety certification, supports a variety of insulation withstand voltages (3kVrms, 5kVrms), and has the characteristics of low power consumption, high electromagnetic immunity and low radiation. The product has data rates up to 150Mbps and common-mode transient immunity (CMTI) up to 200kV/us. The default output level configuration is provided when the input is missing, and the digital channel direction configuration is provided. The wide supply voltage range of these devices allows direct connection to most digital interfaces, is easy to level translate, and is available in SSOP16 and SOW16 packages.
Greenlink Xingchen outdoor power supply GS1200
Greenlink Xingchen outdoor power station has a built-in 1024Wh automotive-grade lithium iron phosphate battery, the built-in inverter adopts pure sine wave output, with 1200W output power, and supports charging and discharging and automatic switching, and the U-Turbo super mode supports 2500W devices. Both USB-C ports support 100W power output, the USB-A port supports fast charging output, and the DC port supports 12V10A output. In addition, it also supports charging with solar panels to meet the power supply of mainstream daily equipment.
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Teardown report: UGREEN Xingchen outdoor power supply GS1200
Built-in digital isolation chip case
NOVOSENSE NSi8263
NOVOSENSE NSi8263 is a high-reliability six-channel digital isolator. This series of products has passed UL1577 safety certification, supports a variety of insulation withstand voltages (3kVrms, 5kVrms), and has the characteristics of low power consumption, high electromagnetic immunity and low radiation. The product has data rates up to 150Mbps and common-mode transient immunity (CMTI) up to 200kV/us. The default output level configuration is provided when the input is missing, and the digital channel direction configuration is provided. The wide supply voltage range of these devices allows direct connection to most digital interfaces, is easy to level translate, and is available in SSOP16, SOW16 packages.
Rongpai π161M30
Rongpai π161M30 is a 3.0kVrms isolation voltage 10Mbps six-channel digital isolator, while a built-in reverse channel, with high anti-interference ability to radiated and conducted noise, the chip supports 3V~5.5V working voltage, surge withstand voltage 5000Vpk, operating temperature range of -40°C~125°C, providing SOIC-16, SOI-16 packaging.
Summary of the charging head network
With the growing demand for portable, efficient, and safe power supplies, traditional optocoupler isolation has been difficult to meet the increasingly complex high-power output application scenarios. The emergence of digital isolation chips has injected new possibilities into the outdoor power supply industry.
Digital isolation technology greatly improves the safety and reliability of outdoor power supplies. It has high anti-interference ability and stable isolation performance, which effectively prevents electrical interference, ensures the stable operation of secondary circuits, and provides users with more reliable power supply guarantee. At the same time, compared with optocoupler isolation, the application of digital isolation chips also greatly improves the efficiency and performance of outdoor power supplies, so as to achieve low-loss and efficient power conversion, improve energy utilization, extend battery life, and provide more durable power support for outdoor activities. The application of digital isolation chips has also promoted the intelligent development of outdoor power supplies. Through the combination of digital isolation technology and intelligent control system, the outdoor power supply can achieve more intelligent power supply management and control, real-time monitoring of power demand, intelligent adjustment of output power, and provide users with a first-hand control and intelligent power supply solution.