How to design a switching power supply?

Open the AC input power supply

The module is reset.

Output flow: flow characteristics according to Table 1.1 of the given value is shown in Figure 1 flow,constant current to a 60% voltage, and current voltage drop (finally turning residues and short circuit. The same state)

Output reverse: in the input reverse connection, in the external circuit is provided with a fuse (<32A/ 55V)

Overheating: internal detector disable module working in overheating, once the temperature isreduced to below normal, automatic reset.

1.4 display and indication function

Input: input power grid monitoring normal display.

Monitoring the output: output voltage normal display. (overvoltage shutdown).

Limiting instructions: limiting the working state display.

Load instructions: load is larger than the lower limit current display.

Relay: input and output and input the normal and normal display.

Output current monitoring: load from 10% to 100%, indicating the accuracy of 5%.

Remote control: remote control adjusting window provides reduced.

1.5 system functions

Voltage trimming: in order to adapt to the battery temperature characteristics, can output voltage of the module to take the temperature compensation.

Load down: in order to adapt to the parallel flow requirements, should be able to adjust the outercharacteristics. Typical voltage drops 0.5%, so the load increased from zero to 100%, the outputvoltage

Reduction of 250mV.

Remote shutdown: can realize remote shutdown.

1.6 electrical insulation

The following tests on 100% testing finished products.

1 in the L (Network) and N (middle) and between the other terminal test DC voltage of 6kV.

2 in all the outputs and L, insulation between N and 2.5kV. this check test DC output and ground.

3 the following points respectively to all other terminals test DC 100V: