Chip static parameters:
Bluetooth chip DA14580:
MCU Xintang N76E003AQ20
The MCU ST (ST) STM8S003
MCU TI STM32F103RBT6
Human body model, referred to as HBM (Human Body the Model), according to the operator's contact with the outer pins of the charging device, by means of the discharge, resulting in device failure established. Specification, a 100pF capacitor in series with a resistor 1.5KΩ human ESD as a standard model.
HBM ESD sensitive components static sensitivity levels, a total of eight levels. If you see the words on the device information 3A, it shows ESD resistance value of this device is greater than or equal 4000V, less than 8000V. EPA corresponding to the level of protection required control in accordance with the standard of less than 4000V.
Machine model, referred to as MM (the Model Machine), originally proposed by Japanese machine circuit model configured in the same human body model, except that the MM comprises a 200pF capacitive discharge, as well as a low resistance discharge resistor. Since the circuit resistance of nearly zero, the energy coupling device is large, the MM model is considered the most severe. Machine model is used to simulate the charged conductor on an electronic device an electrostatic discharge event occurs. Specification, the basic plant model circuit model is 200pF capacitance, without resistance, the device for direct electrostatic discharge. Equivalent circuit shown below.
Charged Device Model, referred to as CDM (Charged Device Model), because the event itself quickly accumulate static electricity discharge, resulting in damage to components of the model.
Specification, charged device model using the RLC circuit configuration, wherein the capacitance values typical value of 6.8 pF, the resistance generally take a few ohms to several tens ohms, an inductance of 1 ~ 20nH. The equivalent circuit can be seen in FIG.
参考：1，http://www.esd0.com/esd/2337.html,
2，https://wenku.baidu.com/view/c4eb5ce377eeaeaad1f34693daef5ef7ba0d1217.html
Laboratory electrostatic generator model : 150pF 330Ω
Electrostatic generator contact discharge current specification GB / T 17626.2-2018:
Static test GB / T 17626.2-2018:
reference:
GB / T 17626.2-2018 Electromagnetic compatibility testing and measurement techniques electrostatic discharge immunity test: https://download.csdn.net/download/jiangchao3392/11655309
