ChipSourceTek is a high-tech enterprise mainly engaged in independent R & D and agent sales of integrated circuits. It is mainly engaged in audio chip, driver chip, MOSFET, charging management chip, lithium battery protection chip, radar chip, small fan chip, TWS chip, charging bin chip, special chip for electronic cigarette, MOSFET, wireless charging chip, special chip for humidifier, touch chip, DC-DC, AC-DC, PD protocol, MCU single chip, 5g RF chip, WiFi chip, wireless chip, special chip, voice chip, step-up chip, step-down chip, regulator LDO and other consumer electronic components. Tel: 0755-27595155, wechat official account: ChipSourceTek -Audio Power Amplifier, Motor Driver, Mosfet, Charging Management, Lithium Battery Protection, Microwave Radar Chip, Small Fan Chip, TWS Chip, Charging Bin Chip,Wireless Charging Chip, Humidifier Dedicated Chip, Touch Chip, DC-D Rss Powered By //www.althebull.com/en/our-advantage/perfect-service.html 2018-03-30 10:55:06 Yiles not only offers high quality products, but also provides professional technical solution (ODM service) to research & design new products. With sales rapid development, Yiles invested and built its own factoryYiles not only offers high quality products, but also provides professional technical solution (ODM service) to research & design new products. With sales rapid development Technology //www.althebull.com/en/problem/tactile-and-self-healing-robot-is-becoming-a-reality.html 2018-01-06 05:23:34 Recently, researchers at the University of Glasgow in the United Kingdom used graphene to develop an electronic robot skin that is more tactile than human hands. It is reported that the newly developed skin of the robot is essentially a tactile sensor, scientists will use it to create more lightweight prostheses, and the surface of the skin feels softer, more natural robot. Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek-technology)-for-obtaining-the-authorization-letter-from-af-technology-（2015.-2016.8.30）.html 2021-08-20 08:59:18 Congratulations to our company (ChipSourceTek Technology) for obtaining the authorization letter from AF Technology （2015.-2016.8.30） Technology //www.althebull.com/en/problem/28-nm-beidou-multi-mode-chip-supports-the-global-signal.html 2018-01-06 05:42:17 May 24, 2017 From the 8th annual academic conference on satellite navigation held in Shanghai, China‘s first "Firebird", the 28nm Beidou multimode chip that supports global signals, was unveiled at the conference. The chip supports four major global navigation satellite systems, the size of the equivalent of a pencil tip. Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek-technology)-for-obtaining-the-authorization-letter-from-xinyong-technology-2017.7.1-2018.6.30.html 2021-08-20 08:53:50 Congratulations to our company (ChipSourceTek Technology) for obtaining the authorization letter from XinYong Technology 2017.7.1-2018.6.30 Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek-technology)-for-obtaining-the-authorization-letter-from-taixi-technology-2017-2018.html 2021-08-20 08:30:34 Congratulations to our company (ChipSourceTek Technology) for obtaining the authorization letter from TAIXI Technology 2017-2018 Office scene //www.althebull.com/en/office-scene/elevator-entrance.html 2021-08-20 05:05:30 Elevator entrance,chipsourcetek Office scene //www.althebull.com/en/office-scene/the-corridor.html 2021-08-20 05:04:46 走廊 Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek-technology)-for-obtaining-the-authorization-letter-from-ltk-technology-20160-2017.html 2021-08-20 08:47:39 Congratulations to our company (ChipSourceTek Technology) for obtaining the authorization letter from LTK Technology 20160-2017 Technology //www.althebull.com/en/technology/take-you-to-know-the-precautions-for-using-tc118ss-chip.html 2021-09-01 03:43:25 Take you to know the precautions for using TC118SS chip Office scene //www.althebull.com/en/office-scene/leisure-room.html 2021-08-20 04:48:16 Leisure room, ChipSourceTek Office scene //www.althebull.com/en/office-scene/development-engineering-department.html 2021-08-20 05:12:58 开发工程部,矽源特科技 Office scene //www.althebull.com/en/office-scene/administration-department.html 2021-08-21 02:23:08 Administration Department,ChipSourceTek Office scene //www.althebull.com/en/office-scene/saleschipsourcetek.html 2021-08-20 04:33:53 Sales,ChipSourceTek Office scene //www.althebull.com/en/office-scene/front-desk-chipsourcetek.html 2021-08-20 04:30:36 Front desk, chipsourcetek Technology //www.althebull.com/en/problem/by-2020-chinas-biomass-heating-will-replace-about-30-million-tons-of-coal.html 2018-01-08 06:06:03 Recently, the National Development and Reform Commission jointly issued with the National Energy Board, "on the promotion of biomass heat for the development of guidance", "opinions" clearly the biomass heat as an important measure to deal with air pollution and accelerate the biomass heat in the region Civil heating and small and medium-sized industrial park heating in the application of building a distributed green low-carbon clean and environmentally friendly heating system. Technology //www.althebull.com/en/problem/ten-key-words-outline-2017-traffic-signal-control-industry.html 2018-01-08 06:26:03 Traffic signal control plays an important role in organizing, directing and controlling the flow direction, flow rate and flow rate of traffic flow and maintaining the traffic order. Traffic control signals are separated from each other in time and passed at different times to ensure traffic Safety, at the same time forcing the traffic flow through the junctions in an orderly manner, improving the efficiency and capacity through intersection, reducing noise and reducing the environmental pollution caused by vehicle exhaust. Technology //www.althebull.com/en/problem/2017-smart-manufacturing-pilot-demonstration-project-review-and-outlook-2018.html 2018-01-08 06:29:18 In the past three years, with the vigorous promotion by the Ministry of Industry and Information Technology and the Industrial Internet Pilot Demonstration Project including Manufacturing Cloud Platform, which was stripped out by MIIT in 2016, the number of pilot projects for smart manufacturing has reached and exceeded the number of pilot projects conducted by MIIT Huaijin Peng in 2015, To 2018 to cultivate 100 smart manufacturing pilot demonstration enterprise "goal. //www.althebull.com/en/our-advantage/top-ten-quality.html 2018-03-30 10:50:26 Experienced team suggest right item and help for product register //www.althebull.com/en/our-advantage/ten-years-of-accumulation.html 2018-03-30 10:50:44 CE & ISO 13485 approval, some products obtain FDA 510K. //www.althebull.com/en/customer-testimonials/mr-chen.html 2018-03-30 10:55:18 Yiles not only offers high quality products, but also provides professional technical solution (ODM service) to research & design new products. With sales rapid development, Yiles invested and built its own factoryYiles not only offers high quality products, but also provides professional technical solution (ODM service) to research & design new products. With sales rapid development //www.althebull.com/en/our-core-values/creative-solutions.html 2018-04-13 10:44:53 More than 10 years experience professional installation and commissioning //www.althebull.com/en/our-core-values/professional-team.html 2018-04-13 10:47:41 More than 30 sets of CNC, grinding machines and other equipment, to provide you with a shorter product delivery //www.althebull.com/en/our-core-values/highest-standards.html 2018-04-13 10:49:33 TESA three-by-one inspections from Switzerland to ensure high standards of product quality //www.althebull.com/en/our-core-values/great-services.html 2018-04-13 10:52:29 Use anti-corrosion materials to extend product life Industry News //www.althebull.com/en/industry-news/smic-made-in-china-has-made-significant-progress-in-the-localization-of-integrated-circuit-equipment-in-china.html 2021-11-11 08:38:00 The localization of China‘s IC core equipment has made significant progress in Beijing. The reporter recently learned from the Beijing Economic and Technological Development Zone that the processing of 12 inch formal product wafers processed by SMIC Beijing factory using domestic equipment has exceeded 10 million times, marking that the domestic equipment of integrated circuits has been fully verified in the market-oriented production, and the technology and market competitiveness of domestic equipment have reached a new level. Industry News //www.althebull.com/en/industry-news/the-pam8904e-enhanced-sounder-driver-enables-small-smart-sensors-and-wearable-devices-to-have-an-audio-user-interface.html 2021-10-31 02:56:24 Diodes (NASDAQ: diod) today announced the launch of an enhanced version of the popular sounder driver to meet the needs of small and portable devices. The pam8904e is packaged in a lightweight package that provides higher performance at lower voltages. Micro piezoelectric and ceramic sounders can now be widely used in product applications such as trackers, alarms, health monitors, safety devices and intelligent sensors in the form of audio user interface. The sounder is small in size, can be installed on portable and wearable devices such as trackers with Internet of things function, and can also support micro smart sensors for monitoring the environment, including safety detectors, water leakage alarms, smoke alarms and carbon dioxide alarms. The pam8904e sounder driver is carefully designed to meet the needs of the smallest applications operating at very low voltage. //www.althebull.com/en/our-advantage/independent-research-and-development.html 2018-08-08 08:46:25 Provides video, pictures, equipment parameters and quotes and other information. Application //www.althebull.com/en/application/knowledge-popularization-of-bluetooth-and-bluetooth-speaker.html 2018-11-17 02:45:54 When it comes to wireless audio devices, the first thing that comes to mind must be wireless speakers and wireless headphones, which are becoming a fashion trend in addition to the ease of connection. On wireless transmission, in addition to the traditional FM and the common 2.4G radio frequency protocol, there is a more mature technology-Bluetooth. Next we will introduce you one-one. Application //www.althebull.com/en/application/what-are-the-types-of-bluetooth-headsets.html 2018-11-20 02:23:46 Bluetooth headset is the use of Bluetooth technology in headphones, so that users can avoid annoying wires and talk easily in a variety of ways Industry News //www.althebull.com/en/industry-news/mix3906-is-a-high-efficiency-filterless-dual-channel-class-f-audio-power-amplifier-with-anti-noise-function-and-built-in-boost-function..html 2019-01-14 04:45:50 2X5W dual-channel boost anti-noise class f amplifier, MIX3906 Industry News //www.althebull.com/en/industry-news/smart-watch-market-alive-again.html 2020-12-08 03:32:31 Is the smart watch market alive again? Honorary Qualification //www.althebull.com/en/certification/motor-drive-control-software-v1.0.html 2021-08-18 06:12:50 马达驱动控制软件 Honorary Qualification //www.althebull.com/en/certification/remote-control-aircraft-app-control-software-v1.0.html 2021-08-20 10:42:40 Good news: Congratulations to our company for obtaining the copyright of the remote control aircraft APP control software v1.0 Honorary Qualification //www.althebull.com/en/certification/speaker-system-control-software-v1.0.html 2021-08-20 10:44:01 Good news: Congratulations to our company for obtaining the copyright of the speaker system control software v1.0 Honorary Qualification //www.althebull.com/en/certification/wireless-camera-monitoring-software-v1.0-.html 2021-08-20 10:44:35 Good news: Congratulations to our company for obtaining the copyright of the wireless camera monitoring software v1.0 Honorary Qualification //www.althebull.com/en/certification/switching-circuit-feasibility-test-software-v1.0-.html 2021-08-20 10:46:47 Good news: Congratulations to our company for obtaining the copyright of Switching circuit feasibility test software v1.0 Wireless camera monitoring software v1.0 Honorary Qualification //www.althebull.com/en/certification/luminescence-control-test-software-v1.0-.html 2021-08-20 10:48:05 Good news: Congratulations to our company for obtaining the copyright of Luminescence control test software v1.0 Honorary Qualification //www.althebull.com/en/certification/human-health-detection-software-v1.0-.html 2021-08-20 10:49:07 Good news: Congratulations to our company for obtaining the copyright of Human health detection software v1.0 Honorary Qualification //www.althebull.com/en/certification/patent-certificate-for-film-horn-.html 2021-08-20 10:51:32 Good news: Congratulations to our company for obtaining a utility model patent certificate for a membrane speaker Honorary Qualification //www.althebull.com/en/certification/patent-certificate-for-new-wall-mounted-speakers-.html 2021-08-20 10:53:20 Good news: Congratulations to our company for obtaining a new type of wall-mounted speaker utility model patent certificate Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek)-for-obtaining-the-agent-authorization-letter-from-shenzhen-nsiway-technology-co.-ltd.-(2017.1.1-2018.1.1).html 2021-08-20 11:29:42 Congratulations to our company (ChipSourceTek) for obtaining the agent authorization letter from Shenzhen Nsiway Technology Co., Ltd. (2017.1.1-2018.1.1) Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek)-for-obtaining-the-authorization-letter-from-nsiway-technology.html 2021-08-20 11:56:27 Congratulations to our company (ChipSourceTek) for obtaining the authorization letter from Nsiway Technology JOB //www.althebull.com/en/job/electronic-hardware-engineer.html 2021-08-20 12:42:48 Electronic hardware engineer,ChipSourceTek JOB //www.althebull.com/en/job/analog-ic-design-engineer.html 2021-08-20 12:44:44 Analog IC Design Engineer ,ChipSourceTek JOB //www.althebull.com/en/job/market-sales.html 2021-08-20 12:47:44 Market sales,ChipSourceTek JOB //www.althebull.com/en/job/marketing-assistant.html 2021-08-20 12:48:59 Marketing Assistant,CST JOB //www.althebull.com/en/job/marketing-engineer.html 2021-08-20 12:50:22 Marketing Engineer,ChipSourceTek Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek-technology)-for-obtaining-the-authorization-letter-from-nsiway-technology--(2020.1.1-2021.12.31)-.html 2021-08-20 08:22:29 Congratulations to our company (ChipSourceTek Technology) for obtaining the authorization letter from Nsiway Technology (2020.1.1-2021.12.31) Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek-technology)-for-obtaining-the-authorization-letter-from-nsiway-technology--(2021.1.1-2021.12.31)-.html 2021-08-20 08:37:46 Congratulations to our company (ChipSourceTek Technology) for obtaining the authorization letter from Nsiway Technology (2021.1.1-2021.12.31) Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek-technology)-for-obtaining-the-authorization-letter-from-imosemi-technology-2020-2021.html 2021-08-20 08:43:21 Congratulations to our company (ChipSourceTek Technology) for obtaining the authorization letter from Imosemi Technology 2020-2021 Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek-technology)-for-obtaining-the-authorization-letter-from-imosemi-technology-2022-2023.html 2022-05-23 12:40:21 Congratulations to our company (ChipSourceTek Technology) for obtaining the authorization letter from Imosemi Technology 2022-2023 Technology //www.althebull.com/en/technology/what-are-the-misunderstandings-when-choosing-the-speaker-of-the-audio-system.html 2021-08-29 01:53:03 What are the misunderstandings when choosing the speaker of the audio system Industry News //www.althebull.com/en/industry-news/launch-a-new-type-of-pd-fast-charging-chip-streamlined-and-extreme-fully-integrated-on-the-secondary-side.html 2021-08-29 02:03:26 Xpd818 and xpd819 realize the full integration of the secondary side, and integrate the constant voltage loop control, synchronous rectifier controller, high voltage synchronous rectifier MOS tube, PD full fast charging protocol controller and VBUS path switch MOS tube, so as to minimize the area of the secondary side PCB and provide the best scheme for compact and small-size adapters Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek-technology)-for-obtaining-the-patent-certificate-of---new-wall-mounted-speaker.html 2021-08-30 02:06:53 Congratulations to our company (ChipSourceTek Technology) for obtaining the patent certificate of - new wall mounted speaker Company News //www.althebull.com/en/cst-news/congratulations-to-our-company--(chipsourcetek)-for-obtaining-the---thin-film-horn-patent-certificate.html 2021-08-30 02:10:54 Congratulations to our company (ChipSourceTek) for obtaining the - thin film horn patent certificate Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek)-for-obtaining-human-health-detection-software-v1.0.html 2021-08-30 02:15:40 Congratulations to our company (ChipSourceTek) for obtaining human health Detection Software v1.0 Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek)--for-obtaining---luminescence-control-test-software-v1.0.html 2021-08-30 02:22:01 Congratulations to our company (ChipSourceTek) for obtaining - luminescence Control Test Software v1.0 Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek)-for-obtaining---switch-circuit-feasibility-test-software-v1.0.html 2021-08-30 02:23:59 Congratulations to our company (ChipSourceTek) for obtaining - switch circuit Feasibility Test Software v1.0 Company News //www.althebull.com/en/cst-news/congratulations-to-our-company(chipsourcetek)for-obtaining---speaker-system-control-software-v1.0.html 2021-08-30 02:28:10 Congratulations to our company(ChipSourceTek)for obtaining - Speaker System Control Software v1.0 Company News //www.althebull.com/en/cst-news/congratulations-to-our-company(chipsourcetek)-for-obtaining---remote-control-aircraft-app-control-software-v1.0.html 2021-08-30 02:30:00 Congratulations to our company ((ChipSourceTek) for obtaining - remote control aircraft app Control Software v1.0 Company News //www.althebull.com/en/cst-news/congratulations-to-our-company-(chipsourcetek)-for-obtaining---motor-drive-control-software-v1.0.html 2021-08-30 02:31:24 Congratulations to our company (ChipSourceTek) for obtaining - Motor Drive Control Software v1.0 Technology //www.althebull.com/en/technology/cst6118-overview.html 2021-12-04 01:18:34 CST6118 overview: Cst6118 is a single channel brushless DC motor driver chip. The maximum continuous output current can reach 1.8A and the peak value can reach 2.5A. CST6118 has built-in power MOS full bridge drive, which can drive forward, backward, stop and brake. At the same time, it has built-in over temperature protection circuit to ensure the safety of chip operation. The full bridge driving architecture and driving mode can save the peripheral filter circuit, save the cost and facilitate the application. The minimal static power consumption (less than 1uA) of the circuit can make the application range of CSTt6118 more extensive. Cst6118 provides sop8 package. Cst6118 product features: Single channel full bridge power drive structure is adopted Operating voltage range (1.5V ~ 7V) The maximum continuous output current can reach 1.8A The maximum peak output current can reach 2.5A Including forward / reverse / stop / brake and other functions Very low quiescent current (typ. 0.1ua) Built in thermal protection function (TSD) with hysteresis effect Cst6118 provides sop8 package Technology //www.althebull.com/en/technology/cst118s-summary.html 2021-08-31 11:50:04 CST118S single channel DC positive and reverse motor driver is a single channel built in power MOS full bridge driver chip, which is suitable for electric toothbrushes, toys, adult supplies, vehicle support. CST118S is a single channel built-in power MOS full bridge drive chip, which has driving forward, backward, stop and braking power, built-in hysteresis thermal effect overcurrent protection power, low on resistance (1.6 Ω), maximum continuous output current up to 1.8A, peak value 2.5A, and no external filter capacitor, CST118S provides SOP8 encapsulation CST118S is widely used in a wireless charging toothbrush scheme. Technology //www.althebull.com/en/technology/haa6801-summary.html 2021-08-31 01:12:34 HAA6801 summary Company News //www.althebull.com/en/cst-news/2021-mid-autumn-festival-and-national-day-holiday-notice.html 2021-08-31 08:28:45 2021 Mid Autumn Festival and National Day holiday notice Industry News //www.althebull.com/en/industry-news/cst118s-is-widely-used-in-a-wireless-charging-mobile-toothbrush-scheme.html 2021-09-01 04:02:50 CST118S is widely used in a wireless charging mobile toothbrush scheme Technology //www.althebull.com/en/problem/understand-the-difference-between-pd-protocol-and-type-c.html 2021-09-01 04:17:51 Understand the difference between PD protocol and type-c Industry News //www.althebull.com/en/industry-news/the-latest-development-trend-of-audio-power-amplifier-ic-in-2021-and-its-difficulties-in-application.html 2021-09-01 04:23:12 The latest development trend of audio power amplifier IC in 2021 and its difficulties in application Technology //www.althebull.com/en/problem/one-minute-to-understand-what-is-usb-pd-fast-charging-protocol-ic.html 2021-09-01 05:17:44 One minute to understand what is USB PD fast charging protocol IC Technology //www.althebull.com/en/problem/understand-the-difference-between-pd-protocol-and-qc-protocol.html 2021-09-01 05:35:35 Understand the difference between PD protocol and QC protocol Technology //www.althebull.com/en/technology/principle-and-characteristics-of-class-d-audio-power-amplifier-ic.html 2021-09-01 05:42:41 Principle and characteristics of class D audio power amplifier IC Technology //www.althebull.com/en/technology/structure-of-speaker-and-function-of-its-components.html 2021-09-01 05:52:51 Structure of speaker and function of its components Technology //www.althebull.com/en/problem/single-charge-pump-boost-mono-power-amplifier-ht8310-/-ant8811b-/-ltk5311-test.html 2021-09-01 05:59:33 Single charge pump boost mono power amplifier ht8310 / ant8811b / ltk5311 test Technology //www.althebull.com/en/technology/5v-input-class-ab-/-class-d-can-be-switched-to-chips-of-the-same-type-without-boost.html 2021-09-03 12:27:00 5V input class AB / class D can be switched to chips of the same type without boost Company News //www.althebull.com/en/cst-news/i-wish-you-all-a-happy-mid-autumn-festival..html 2021-09-06 12:37:29 ChipSourceTek I wish you all a happy mid autumn festival. Industry News //www.althebull.com/en/industry-news/working-principle-of-smart-bracelet.html 2021-09-06 01:40:58 Working principle of smart Bracelet Industry News //www.althebull.com/en/industry-news/different-battlefields-the-same-hynitron.html 2021-09-06 01:48:21 Different battlefields, the same Hynitron Industry News //www.althebull.com/en/industry-news/bluetooth-speaker-purchase-guide-from-hundreds-to-thousands.html 2021-09-06 03:50:29 Bluetooth speaker purchase guide: from hundreds to thousands Industry News //www.althebull.com/en/industry-news/electric-toys.html 2021-09-06 04:01:41 Electric toys Company News //www.althebull.com/en/cst-news/chipsourcetek-i-wish-all-partners-a-happy-national-day.html 2021-09-11 03:47:59 ChipSourceTek I wish all partners a happy National Day Application //www.althebull.com/en/application/types-of-intelligent-toys.html 2021-09-14 12:19:58 What kinds of smart toys are there? Application //www.althebull.com/en/application/sweeping-robot.html 2021-09-23 11:36:38 Floor sweeping robot, also known as automatic cleaner, intelligent dust collector, robot vacuum cleaner, etc., is a kind of intelligent household appliances. It can automatically clean the floor in the room with a certain amount of artificial intelligence. Brush sweeping and vacuum are generally used to absorb the ground sundries into their own garbage storage box, so as to complete the function of ground cleaning. Generally speaking, robots that complete cleaning, dust collection and floor cleaning are also uniformly classified as floor sweeping robots. Sweeping robots were first sold in European and American markets, and gradually entered China with the improvement of domestic living standards. Application //www.althebull.com/en/application/detailed-classification-of-intelligent-wearable-products.html 2021-09-24 04:40:30 Detailed classification of intelligent wearable products Technology //www.althebull.com/en/technology/application-of-mcu-touch-key.html 2021-09-24 04:51:14 Application of MCU touch key Application //www.althebull.com/en/application/who-will-dominate-the-competition-for-vehicle-support-style.html 2021-09-25 12:06:00 Who will dominate the competition for vehicle support style Industry News //www.althebull.com/en/industry-news/the-world-factory-is-on-strike!-what-happened-behind-the-power-rationing-and-shutdown-sweeping-many-provinces.html 2021-09-26 12:28:09 在全球合作和竞争的时代，大国博弈，不再是“明刀明枪”。而是科技战，金融战，贸易战，今天我限制给你出口，明天给你提高关税，总之，让你付出更多，我就收获更多。 因此，有的时候一个国家的动作，看起来只是本国的需求，但背后却有着不一样的深层意义。 Technology //www.althebull.com/en/problem/typical-example-of-single-chip-microcomputer-how-to-control-led-lamp-with-pwm-program.html 2021-09-26 12:45:03 　我们知道 51单片机本身是没有pwm接口的，这个程序是通过软件模拟pwm.在一定的频率的方波中，调整高电平和低电平的占空比，即可实现LED灯亮度控制。 　　要用51产生PWM去控制LED，首先要确定PWM的周期T和占空比D，确定了这些以后，可以用定时器产生一个时间基准t，比如定时器溢出n次的时间是PWM的高电平的时间，则D*T=n*t，类似的可以求出PWM低电平时间需要多少个时间基准n‘。 Technology //www.althebull.com/en/problem/what-is-the-pd-protocol-fast-charging-one-minute-to-understand.html 2021-09-28 12:53:55 Speaking of the fast charging protocol, you may be familiar with Qualcomm‘s QC fast charging. As for the usb-pd (full name "USB power delivery") fast charging protocol, you may feel strange. Let‘s learn about the usb-pd fast charging protocol today. Xiaobian‘s current sports headphones are bought by mail from tmall‘s six yuan wallet after receiving a voucher from the public number that saves money in China. The original price of sports earphones was more than 40 yuan. After receiving the coupon, it was only 6 yuan. I also bought a dollar data cable, a dollar toughened film, a six dollar E-sports mouse, etc. The quality is good. It is recommended that friends who often visit Taobao tmall pay attention to China to save money. You can save a lot of money. Industry News //www.althebull.com/en/industry-news/will-the-price-of-chips-rise-sun-moonlight-kunshan-plant-was-cut-off.html 2021-09-28 04:51:23 近日，在“能耗双控”政策下，浙江、江苏、云南、广东以及东北等地的高能耗企业陆续开始停产。 据报道，从9月22日起，多家上市公司陆续发布公告称，因供电紧张，为响应当地“能耗双控”的要求，公司或旗下子公司的生产线临时停产。 全球最大的半导体封测厂商日月光集团旗下的日月光半导体（昆山）有限公司近日发出“限电停产通知”。 Technology //www.althebull.com/en/technology/wireless-charging-of-electric-toothbrush-has-six-advantages.html 2021-09-29 12:58:04 The intelligent electric toothbrush has a wireless charging and automatic rotating brush head, which is in line with the overall design of ergonomics. Coupled with the free switching amplitude intensity, it ensures the high efficiency and convenience of brushing teeth. At the same time, the electric toothbrush is also very convenient in the use process, which makes brushing more worry-free, and is also conducive to the formation of good habits in our daily life. Technology //www.althebull.com/en/technology/recommended-selection-of-built-in-boost-audio-power-amplifier-ic.html 2021-09-30 11:27:52 In view of the fact that most Bluetooth portable speakers are powered by a single lithium battery, it is difficult to substantially improve the output power of the speaker due to the limitation of input voltage. The terminal market is eager for the audio power amplifier to break through the limitation of power supply and provide sufficient output power for Bluetooth speakers. Shenzhen siyuante Technology Co., Ltd. launched a series of built-in boost amplifiers, including built-in boost, built-in boost D, AB / D switching, anti broken sound function, etc., providing the ultimate sound quality experience. Technology //www.althebull.com/en/problem/how-to-select-a-cost-effective-motor-drive-ic-chip.html 2021-10-18 11:43:02 如何选型到高性价比的马达驱动IC芯片（Motor drive）？为了让马达实现正反转，此时需要为马达选择适合的马达驱动芯片，主要需要考虑得关键点有以下几个： 1、产品所用到的马达在正常工作时，输入电压，输出正常工作电流 2、当马达被堵住不动时，所达到的堵转电流，即常说的，峰值电流，卡死电流 3、成品的工作电压 4、马达驱动IC的内阻 Design //www.althebull.com/en/design/an-application-of-touch-mcu.html 2021-10-18 11:48:15 The company has a professional development team to help customers develop solutions free of charge Single key 2 output LED dimming, color matching and temperature touch application The application can realize the effects of LED light touch switch control, brightness adjustment and color temperature adjustment. The peripheral circuit required by the scheme is simple and easy to operate. Low standby power consumption and power saving. It can be used as battery products, and the standby current is less than 10uA Up to 4 key touch Technology //www.althebull.com/en/problem/4890-and-4150，8302-dual-layout-application-reference.html 2021-10-18 01:49:23 4890和4150,8302双layout应用参考 4890产品有NS4890和XS4890，LM4890 4150产品有XS4150，NS4250，XS8302，CS8302 Technology //www.althebull.com/en/problem/class-d-power-amplifier-ic-board-layout-guide.html 2021-10-18 04:59:27 如果没有遵循一些基本的布局指南，PCB设计将会限制D类放大器的性能或降低其可靠性。下面描述了D类放大器一些好的PC板布局实践经验。采用带有两个BTL输出的STA517B(每通道175瓦)数字功率放大器作为范例，但对所有的D类放大器而言，其基本概念是一致的。 　　地平面 　　利用过孔将电路板的顶层器件与电路板底层的地平面连接。但是，过孔仍会堵塞电流回流到地平面，因此须灵活的使用这些过孔。 　　直接在放大器之下的区域须敷铜。如果放大器在其封装的底部有一个裸露的焊盘或插件，那么IC必须焊接到放大器下放的地，如此可以作为放大器的扇热区。在这种情况下，地必须从IC正下方向两边引出，这样可以确保其裸露。放大器下面的地须打上许多过孔，通过过孔向电路板的底层扇热，因此它还可以作为一个扇热区域。 　　放大器的正下方是不建议走信号线的。须打几个过孔和地平面相连以确保所有器件彼此之间的地参考点有一个直接和低阻抗的路径。这对输出滤波器是尤为重要的。所有的滤波地必须有一个直接路径回流到放大器正下方的地平面。 　　电源旁路电容 　　为确保稳定性及抑制噪声和串扰，对电源加旁路电容是非常重要的。放大器的输出级吸收了大量的电流，且开关动作迅速。当输出开关动作时，旁路电容和放大器电源输入引脚之间的寄生电感会产生很大的毛刺，因此寄生电感必须保持尽可能的小。为了能在放大器功率级减小杂散电感和旁路电容之间谐振的影响，须在每个电源输入管脚需使用一个100nF的电容与1uF的电容并联。 　　100nF的电容必须和IC尽可能的靠近(通常不超过2毫米)。而且，如图1所示，旁路电容必须和IC在同一层，以便减小总路径长(和杂散电感)。1uF的电容须依次放置，和100nF电容紧靠在一起。 Technology //www.althebull.com/en/problem/causes-of-emi-in-class-d-audio-power-amplifier-ic-and-pcb-layout-design-reduce-the-impact-of-class-d-amplifier-on-fm-radio-/-analog-tv.html 2021-10-18 06:29:27 由于在效率上相对于AB类放大器的巨大优势，D类放大器的应用越来越广泛。根据市场调研机构 Gartner的报告，D类放大器在2006年至2011年之间的复合年成长率将达15.6%，从3.34亿美元成长至6.88亿美元，主要的成长动力来自于功耗敏感及空间受限的消费类电子产品。但D类放大器开关输出的拓扑结构带来了高频的EMI，如何控制好D类放大器的EMI，是系统工程师必须要考虑的方面。 D类放大器中EMI的产生 变化的电压和电流信号会产生电磁场辐射，形成电磁波干扰（EMI：Electro-Magnetic Interference），这些电磁波信号会影响收音机、电视和手机等产品的正常工作。为了防止电子设备的EMI问题，世界各国都制定了相关的标准规定，如美国的联邦通信委员会（FCC：Federal Communication Commission）的认证，目的都是限制电子产品的电磁波辐射。 EMI测试是在特定的电波暗室中进行的，测量由产品中辐射出来的电磁波强度，与FCC等规范相比较，不得超过规定的最大能量。FCC规范中将产品按用途分为 CLASS A 、 CLASS B 两大类， A 类为用于商务或工业用途的产品， B 类为用于家庭用途的产品， FCC 对 B 类产品法规要求更严格。下表显示的是FCC 规范的CLASS A和CLASS B标准： 传统D类放大器开关输出的拓扑结构是一个很好的EMI发射源：如调制的开关信号，开关信号的边沿变化，电源线上变化的电流信号等都会产生大量的EMI 不同的发射源对应了不同的EMI频谱，由于D类放大器的调制频率一般在250kHz到1.5MHz之间，因此调制的开关信号和电源线上变化的电流信号带来的EMI主要集中在10MHz以下的频段；而方波的边沿变化一般是在纳秒级别的，因此它们所带来的EMI主要集中在几十MHz到几GHz的高频段。 EMI主要通过PCB的走线、通孔和扬声器的连线向外辐射，较大能量的EMI辐射需要一个“高效率”的天线，对不同的频率，一个有效的天线长度是该频率波长的四分之一（λ/4），小于这个长度，就不能形成有效的对外辐射。对30MHz的频率，采用一般的FR4的PCB板，天线长度需要大于114.1cm才能形成有效的辐射。所以在手机上采用D类放大器时，在放大器输出的PCB走线和扬声器连线上的方波边沿变化是EMI的最重要来源。特别是手机应用中所关心的一些频段，如下表所示：基本都在100MHz以上，因此我们需要特别地关注由方波边沿变化所引起的EMI辐射。 Technology //www.althebull.com/en/problem/application-circuit-diagram-and-pin-function-analysis-of-8002b-power-amplifier.html 2021-10-19 12:21:13 本文主要是关于8002b功放的相关介绍，并着重对8002b功放的应用电路图及引脚进行了详尽的阐述。 8002B功放 8002B将会进入关断模式，此时的功耗极低，IQ仅为0.6uA。  8002/8002B是专为大功率、高保真的应用场合所设计的音频功放IC。所需外围元件少且在2.0V～5.5V的输入电压下即可工作。  Technology //www.althebull.com/en/problem/3-types-of-frequently-asked-questions-about-charging-wearable-products.html 2021-10-20 11:26:56 当设计可穿戴式应用时，我们已发现了一些与充电器相关的常见问题。在这里，让我们看一些最常被咨询的问题。 问：哪种线性充电器最适合我的应用？ 答：当为特定应用选择合适的充电器时，您应该考虑多种因素：功率水平、尺寸、电池类型等。 以TI充电器产品组合中不同的充电器为例。bq24232是一种线性充电器，具有500mA的充电电流和电源路径的特性。该解决方案的体积约为3.5mm × 4.5mm2，包括必要的电阻器和电容器。这对需要系统即时开启功能且空间不受限的应用而言是绝佳的选择。 如果电路板空间是受限的，那么bq24040可提供一个2.5mm × 3.5mm2的解决方案。该充电器可支持10mA至1A的充电电流，并具有充电状态指示和可编程的预充电和终止速率。由于其灵活性，该器件成为低功耗应用中最广泛使用的线性充电器之一。但bq24040的最小终止电流为6mA，这对超小型电池而言可能太大了。因此，对于尺寸和电池容量均非常小的应用（如助听器），bq25100是很好的选择。该 （IC）本身的封装尺寸仅为1.6mm × 0.9mm，解决方案总体积也很小，只有2.1mm × 2.2 mm2。此外，该IC可在电流小于1mA时终止充电，并为小型电池延长运行时间。 当挑选充电器时，电池电压是另一个决定因素。bq24232和bq24040产品系列都有4.2V和4.35V的选项。bq25100则多提供了两个选项（4.3V和4.06V的选项），以满足可穿戴式应用的特殊需求。 Design //www.althebull.com/en/design/touch-control-dimming-and-color-matching-temperature-mcu.html 2021-10-20 05:45:59 触摸类产品，单键2输出，LED调光调色温触摸应用，可实现LED灯光触摸开关控制，亮度调节，以及色温调节等效果，外围简单，待机功耗低，省电,适用于化妆镜灯，宿舍灯，小夜灯等一些消费类触摸控制产品。

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