What happens when the capacity of the external capacitor of DH321 becomes smaller

The smaller capacitance of the DH321 external capacitor will increase the ripple of the 2 pins.

Capacitor: Capacitor, often referred to as capacitor, is represented by the letter C. Definition 1:

A capacitor, as the name suggests, is a 'container for electricity' and is a device that holds an electric charge. Product Name: capacitor.

Capacitors are one of the electronic components widely used in electronic devices, which are widely used in circuits in terms of DC blocking, coupling, bypass, filtering, tuning loop, energy conversion, control, etc. Definition 2: A capacitor, any two conductors (including wires) that are insulated from each other and in close proximity to each other form a capacitor.

Capacitors are not the same as capacitors. Capacitance is a fundamental physical quantity, symbol c, and the unit is f (farad).

The general formula c=q u parallel plate capacitor is the special formula: the inter-plate electric field strength e=u d, and the capacitance determination of the capacitor c= s 4 kd

With the rapid development of electronic information technology, the upgrading speed of digital electronic products is getting faster and faster, and the production and sales of consumer electronic products based on flat-panel TVs (LCD and PDP), notebook computers, digital cameras and other products continue to grow, driving the growth of the capacitor industry.

The decrease in capacitance has an impact on the capacitor itself, which damages the life of the capacitor.

There are two main reasons for the capacitance to become smaller:

1) The medium is dry.

2) The capacitor is discharged slowly in some places.

Specific analysis: 1) The drying of the medium indicates that the capacitance has been aged, the capacitance has decreased, and the discharge capacity has decreased, which means that it has deteriorated and gone wrong.

2) The slow discharge of the capacitor is due to mildew or soft breakdown in a small area inside the capacitor, and it is also a fault with the capacitor.

IC3212 is actually an IC that integrates an oscillation circuit and a drive circuit and a feedback (voltage stabilization) circuit, and the drawings indicate that its 2 pins are the power supply end of the VCC power supply, and the current comes from the D103 diode half-wave rectification into DC, and the C103 is an electrolytic capacitor, and the filtering effect is mainly to filter out the low-frequency ripple, and the small capacity will increase the ripple of the 2 pins.

The voltage doubling circuit is generally only used in the case of high voltage and low current, such as electronic ignition, electric mosquito swatter, etc., like you want to output thousands of watts of impossible, that is because it is completed by the charge and discharge superposition of the capacitor, the current is only a few mA levels, you 12600V to 2kw, the current is 160mA, and to 1W more volts, how big is the capacitance? It is estimated that the single volume is larger than the bedside table, and you can figure it out, but I forgot the specific formula algorithm, sorry.

Different circuits lead to different results,+

For example, the decrease of capacitance capacity in LC resonant circuits will increase the resonant frequency; The decrease in capacitance capacity in the filter circuit will reduce the filtering effect and the voltage drop will be unstable (the voltage will go up and down). Decreasing or increasing capacitance in a coupling circuit can distort the signal, and so on. It should be treated on a case-by-case basis.

If a current loop cannot be formed, the voltage at both ends of the capacitor will increase. If a current loop can be formed, the capacitor will be discharged through an external circuit.

q=cu

When the voltage at both ends of the capacitor is constant, the larger the capacitor capacity, the more charge is stored.

u=q cWhen the stored charge q is constant, the larger the capacitance, the smaller the voltage at both ends of the capacitor.

The decrease in capacity leads to a decrease in capacitive reactance and a decrease in load current.

When the capacitance of the capacitor in the filter circuit decreases, the output ripple increases and the voltage decreases.

This capacitor is an AC rectifier output DC filter capacitor, when the capacitor capacity decreases more, the output DC pulsation fluctuates more violently, the output power decreases, and the power tube is also easy to damage.

The circuit is not the same, and the resulting result is not the same, + such as LC resonant electricity

A decrease in the capacitance capacity in the road will lead to dao

increase the resonant frequency; The decrease in the capacitance capacity of the back filter circuit will reduce the filtering effect and the voltage drop will be unstable (the voltage will be high and low). Decreasing or increasing capacitance in a coupling circuit can distort the signal, and so on. It should be treated on a case-by-case basis.