Diodes Incorporated launched the single-phase brushless DC motor pre-driver ZXBM1021, which provides multi-functional and compact variable speed control for cooling fans, exhaust fans, extractors, motors and pumps in a variety of consumer and industrial products solution. This flexible pre-driver integrates common external components such as PWM signal integrators and MOSFET buffers, allowing designers to greatly simplify the system structure and reduce the number of components on the overall circuit board.
This pre-driver can directly control the motor speed by directly using external PWM signal, DC voltage signal or thermistor network input. It integrates Hall bias and amplifier circuits to ensure compatibility with various Hall effect sensors. The open collector frequency generator pin provides a speed output, which can monitor rotation and speed externally. In order to prevent the motor from stalling or the speed is lower than the minimum value when the control signal disappears, ZXBM1021 is available for users to set the minimum speed.
ZXBM1021 provides high-side and low-side drive output, plus 50mA source current and 100mA source / sink current capability, which can properly meet the needs of external H-bridge switches and motor power without additional buffering. A separate low-side drive power pin provides the ability to adjust the turn-on speed of the low-side MOSFET without affecting the turn-off speed, which helps reduce electromagnetic interference noise and shoot-through.
This pre-driver has an operating voltage range of 6.8V to 18V and can directly support 12V motors, as well as 24V and 48V motors through external voltage regulators. This device has a programmable overcurrent limit function, which effectively detects the rotor stall status, avoids overheating or burning of the H-bridge and motor windings, and performs a soft start after the rotor is unlocked to minimize the inrush current of the motor.
The ZXBM1021 uses a small footprint and heat-strengthened ultra-thin U-QFN4040-20 chip package, plus a wide working range from -40oC to + 110oC, which is ideal for applications that are space constrained and have high thermal requirements. The QSOP20 package version will be available later this year.
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Diodes Introduction
Diodes Incorporated is a S & P SmallCap 600 Index and Russell 3000 index company. It is a leading global manufacturer and supplier of discrete, logic and analog semiconductor products, serving consumer electronics and computers. , Communications, industrial and automotive markets. Diodes products include diodes, rectifiers, transistors, MOSFETs, protection devices, special function arrays, single-gate logic, amplifiers and comparators, Hall effect and temperature sensors, covering LED drivers, AC-DC converters and controllers, DC- Power management devices including DC switches and linear regulators, voltage references, and special function devices such as USB power switches, load switches, voltage monitors, and motor controllers.
Diodes' headquarters, logistics center and US sales office are located in Plano, Texas, USA, and are located in Plano, San Jose, California, Taipei, Manchester, United Kingdom and Neuhaus, Germany Design, marketing and engineering centers; wafer manufacturing plants in Kansas City and Manchester, Missouri, and two in Shanghai; two assembly and test facilities in Shanghai and Chengdu; and Neue in Germany One each in House and Taipei; engineering, sales, warehousing and logistics offices in Fort Worth, Taipei, Hong Kong, Manchester, Shanghai, Shenzhen, Seongnam and Suwon in South Korea, Tokyo and Munich; and With sales and support offices around the world.
Take a deep breath, close your eyes, the world has the freshest oxygen ... Yu Quan's "Deep Breath" is well known to us, but as the environmental problems become more and more serious, the haze sky also increases, PM2.5 PM10 and so on Vocabulary has also been mentioned more and more, and air purifiers have quickly become popular on the market with this "air quality" trend. Along with this, the air-clean brand has sprung up, and various technologies are dazzling. Which ones are indeed effective and which are just tasteless propaganda? How does the Air Purifier bother us to get rid of pollution? And look at the editors for you.
Analysis of air purifier
The critical value of PM2.5 content is 75 μg / m3
The pollutants in the air mainly include soot, total suspended particulates, inhalable particulates (PM2.5) and fine particulates (PM10). The smaller the diameter of the particulates, the deeper the part that can enter the respiratory tract. 10 micron diameter particles It is deposited in the upper respiratory tract, and particles below 2 microns can penetrate 100% into the bronchiole and alveoli.
Air purifier Air Cleaner Home air purifeir sales increased by 90.5% compared with last year
According to a report recently released by the China Electronics and Information Industry Development Institute, due to the haze weather, air purifiers have become the most concerned home appliance products, with sales of nearly 2.4 million units nationwide last year, a year-on-year increase of 90.5%; retail The amount reached 5.6 billion yuan, a year-on-year increase of 105.9%.
HEPA filter needs to be replaced
The filter of the air purifier is the same as the filter of the water purifier, and it is not effective for a long time. After long-term use, the accumulation of dust on the surface of the filter will also cause the filter to gradually fail. Therefore, when the haze is more serious, the non-washable HEPA filter needs to be replaced every three months.
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