PP875 | ABB | Equipped with comprehensive protection functions

Description

PP875 | ABB | Equipped with comprehensive protection functions

1. .Many products are not yet on the shelves please contact us for more products
2. .If there is any inconsistency between the product model and the picture on display, the model shall prevail. Contact us for the specific product picture, and we will arrange to take photos in the warehouse for confirmation
3. .We have 16 shared warehouses around the world, so please understand that it can sometimes take several hours to accurately return to you. Of course, we will respond to your concerns as soon as possible

This PP875 introduces a DC-DC converter switching power supply with model L4960, as shown in the figure. From the figure, it can be seen that the circuit is very simple, and its usage method is very similar to LM317. First, a 50Hz power transformer is used for AC-AC conversion, reducing~220V to~34V. Then, VD1 and C1 are rectified and filtered to a DC voltage of about 46V and input to L4960. PP875 then performs DC-DC conversion. At this time, the range of output voltage can be adjusted to 5V, increased to 40V, and the maximum output current can reach 2.5A (high-power switching tubes can also be connected for current expansion), And it is equipped with comprehensive protection functions, such as overcurrent protection, overheating protection, etc. Although the usage method of L4960 is similar to LM317, the efficiency of L4960 in switch mode power supply is not the same as that of LM317 in linear mode power supply. L4960 can output a maximum power of 100W (Pmax=40V * 2.5A=100W), but it only consumes a maximum of 7W, so the heat sink is small and easy to manufacture. Similar to L4960, there is L296, which has the same basic parameters as PP875 , except that the maximum output current can reach 4A and it has more protection functions, and the packaging form is also different.

The PP875 is the touch delay switch power circuit. When the touch pad is touched by hand, it is equivalent to giving a trigger signal to the base of VT1 to conduct, so VI2 also conducts. The power supply charges the capacitor cz through VT2. When the charging voltage is high enough, VT2 cuts off, VT3 conducts, and VT4 also conducts, causing the bulb to light up and illuminate. When the charge on C2 is slowly released, vr3 cuts off. VT4 also shuts off the light bulb.

Mailbox：sauldcsplc@gmail.com |ABB PP875
www.abbgedcs.com | Qiming Industrial Automation| Simon +86 13822101417