PoE is a technology that transmits power through the network. It provides data transmission and power supply for the connected equipment through the network cable, thus simplifying the power supply and system maintenance.Tengda launched a Gigabit AT standard EthernetPoE power supply unitThis power supply device can convert the network cable that does not support PoE power supply to support PoE power supply output through AC power supply.
The output power of this power supply is 53.5V 0.6A, and the power supply standard is IEEE 802.3 AT, which is the packaged AT suffix. It supports power supply for equipment below 30W, and supports gigabit rate.The following charging head network brings this Tengda Gigabit EthernetPoE power supply unitTake a look at the internal materials.
The product is packed in a kraft paper box, with a product information sticker on the top, printed with the brand, name, model, selling points and relevant description of this power supply.
The package contains power cord, power supply unit and operation instructions.
Both ends of the power line are three pin plug and pin plug, and the cable specification is 10A 250V~.
Tenda Gigabit AT standard EthernetPoE power supply unitIt is a rectangular shape, and the main body adopts white frosted shell, with obvious edge transition.
PoE Injector is printed on the top of the fuselage.
There is a nameplate sticker on the bottom of the power supply unit. It can be seen from the sticker that the power supply unit has passed CCC, CE, FCC and other certifications.
Tenda Gigabit AT standard EthernetPoE power supply unitThe model is PoE30G-AT, and the rated input is 100-240V~50/60Hz 0.8A.The rated output is 53.5V 0.6A, and the power is 32.1W.
The input terminal adopts black letter base and independent module design.
The other end is equipped with two RJ45 network cable sockets, and is equipped with corresponding indicator lights. The input and output identification mark is printed beside the interface.
The measured length of the power cord is about 52.5cm.
The measured length of the power supply unit is 132.46mm.
The width is 60.44mm.
The thickness is 33.03mm.
The size of the power supply unit in the hand is intuitive.
In addition, the measured net weight of the power supply is about 178g.
When the power is on, the PWR indicator lights green.
Disassembly of Tenda Gigabit AT standard Ethernet PoE power supply unit
After seeing the unpacking of this Ethernet PoE power supply, we will take a look at the internal material usage.
The shell of the power supply unit is welded by ultrasonic wave, and the shell is pried off through the shell seam.
The front of PCBA module is at a glance, and the right side is the AC input terminal, welding power input socket, fuse, NTC surge suppression resistance, safety gauge X2 capacitor, common mode inductance.Solder the high-voltage filter capacitor, switch tube and transformer to the left.The left side is welded with network interface, LED indicator, network transformer and PoE power supply chip.
The back of PCBA module is welded with rectifier bridge, primary master chip, feedback optocoupler and rectifier tube.
Welding power socket at input end.
The input fuse specification is 3.15A 250V.
The specification of NTC surge suppression resistor is 5D-11.
The capacitance specification of safety gauge X2 is 0.47μF。
Close up of discharge resistance of safety gauge X2 capacitor.
Common mode inductance is wound with insulating frame.
Rectifier bridge is from PY Pingwei, model TMBF310, specification 3A 1000V.
High voltage filter capacitor from Fengbin, specification 68μF400V。
The power supply master chip is screen printed 5G0AL and sealed with SOT23-6.
The specification of the filter capacitor powered by the main control chip is 4.7μF 50V。
The primary switch tube is from Jilin Huawei, the model is JCS7HN65C, which is a 650V withstand NMOS with a conductivity of 1.05 Ω. It is packaged with TO220F and sealed to enhance heat dissipation.
Four sampling resistors are connected in parallel to detect the switch tube current.
The transformer core is marked with the words POE30G-T1.
The blue Y capacitor is from JEC Zhixu Electronics.
Yiguang EL1013 optocoupler is used for output voltage feedback.
431 voltage reference and optocoupler are used for output voltage stabilization.
The rectifier tube model is ES2JG, and the specification is 2A 600V.
Close up of RC absorption circuit in parallel with rectifier tube.
The output filter capacitor is from KYS Kangchengda, a SG series high-frequency low resistance product.
Specification: 330μF 63V。
The PoE power supply control chip, MK3614, is a highly integrated single-chip Ethernet power supply controller from Maorui Core, which is used for power supply of IEEE802.3 AF/AT equipment.The chip is integrated with electric equipment detection, current limit, load disconnection detection and working current level.
The MK3614 is internally integrated with 80V/0.3 Ω power MOS tube, current detection resistor and intelligent protection circuit, supporting 30W output power.It has LED indicator light to indicate the working status, and supports multiple working modes.MK3614 adopts ESOP8 package with enhanced heat dissipation, and the external components are simplified.
Material information of Maoruixin MK3614.
Close up of network isolation transformer, used to isolate power supply and communication signal.
The output end is welded with two indicators and network interface.
Close up of output indicator.
Close up of power indicator.
The network interface is from HAXN Huaxin Electronics.
Take a look at all of them and have a family photo.
Disassembly summary of charging head network
Tengda's Gigabit Ethernet PoE power supply is designed with a white strip shell. One end is equipped with an AC power socket, and the other end is equipped with two network cable interfaces.By using this power supply, the network cable that does not support PoE power supply can be converted to support PoE power supply output.The output power of this power supply is 53.5V 0.6A, and the power supply standard is IEEE 802.3 AT. It supports power supply for equipment below 30W and gigabit rate.
The charging head network learned through disassembly that this power supply has a built-in flyback switching power supply and a fixed voltage output.The primary switch tube is from Jilin Huawei and is rectified by fast recovery diode.PoE power supply control chip adopts Maorui core MK3614, which is a single chip solution. The internal integrated switch tube and current detection resistor have comprehensive protection functions, greatly simplifying the internal design of PoE power supply.