Details determine success or failure of--electronic sphygmomanometer power system design three points

There are a lot of blood products cannot be powered on or panic phenomena are and power system, power system and other core systems have equal importance, its like biological heart, is the power source of the pubs, there is no doubt about it!

　　Electronic sphygmomanometer is a necessary power supply equipment, the power to choose AA-type batteries or rechargeable batteries in General, you can also use adapter's voltage.

These power supplies are very common, as long as selection in accordance with the established specifications to the standard products. But the thing is not so simple, technical characteristics can be cum "Sparrow is small, UCH", it includes general electronics, MCU, and energy-consuming electric devices---motor from electrician knowledge can know that the device when you are working in the moment of its current consumption is much larger than normal working operation of current consumption, can cause a sudden decrease of power supply voltages, and reduce the impact on the MCU voltage will be relatively large, so the power system design must be able to host this voltage reducing impact, can guarantee stable operation of the system.

In electronic sphygmomanometer power system design process, the most important thing to note three things: first, it is necessary to complete a thorough understanding of the characteristics of the load and power requirements; second, it is necessary to understanding of the power system working principle, determining the technical parameters of the device, its advantages and disadvantages; and third, in which completely thorough understanding of the selected parameters of the device, content adaptation and use.

The previously mentioned sphygmomanometer power system is characterized by: start the load is too large, the impact is likely to result in voltage transient lower leading MCU may be unintended adverse reset or reset.

Therefore, for such features, power system design must take into account the two principles: the first is buffered, the second is a carefully designed reset circuit. For the first point that must be taken to select responsive power management chip at the same time increase the output of the capacitor, and reset, depending on the characteristics of the power system using RC reset or choose special reset chip.

Shenzhen is Czech electronic agents United States GAMMA products, receives its usual military quality, meet the demanding requirements of medical industry, in the area of the sphygmomanometer GM6250 series are widely used, its quality tracking data for the following, its technical 30PPM characteristics are as follows:

GM6250 series, voltage 12V, current 250mA, TO-92/SOT-23/SOT-89 packaging

1. low dropout, 380mV, can output currents 200mA.

2. each Item 0.1V, you can ensure a desired voltage values.

3. high-current, you can reach 300mA of current capacity.

Measurement can reach more than 400mA.

4. a variety of packaging, TO-92, SOT-23, SOT-89

5. the output of high precision: the output precision + 2%

6. low power dissipation in 5V output is typical for 1uA

7. working temperature:-30 ~ + 80

8. temperature protection, short circuit protection

9. low price, the price of the product at the price in its class

10. lead-free, green environmental protection.

Basic things are probably the most important thing, many people tend to ignore this basic principle, many high-tech products fail in cutting-edge technology, but in some basic things that fail!