Winchen WC PD25C012A 12V 2A PoE Module IEEE802.3af/at Standard Power Module 1500V High Voltage Isolation PoE Board

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Product Overview

Description



Products Description


● Product Features
* Compliance with IEEE802.3af/at standard.
* 42V~57V wide operating voltage range.
* Maximum output power up to 24W; Rated output: 12V/2A
* The output ripple is less than 200 mV.
*Conversion efficiency can be as high as 87% (input: 48V output:12V@2A).
* It has excellent reliability and circuit protection such as over current, short circuit, under voltage and surge.
* PCBA standard size: 53.5*14*16.7mm.
* Input/Output: isolate 1500Vdc.
* Class 4 IEEE802.3 PD.
* High reliability: The design meets the 5 million hour average failure interval.

● Mechanical Dimensions




● Pin Definition


Pin
Name
Description
1
Vin+
This pin is connected to the input negative (+) power supply using the "middle overlap method", so it needs to be connected to the center tap of the 4/5 network transformer to connect this pin. If the power supply adopts the "end crossing method", it is necessary to connect the center tap of the 1/2 network transformer to this pin
2
Vin-
This pin is connected to the input negative (-) power supply using the "middle overlap method", so it needs to be connected to the center tap of the 7/8 network transformer to connect this pin. If the power supply adopts the "end crossing method", it is necessary to connect the center tap of the 3/6 network transformer to this pin
3
NC
Reserve fixed pin
4
Vout-
This pin is the module output negative pole
5
Vout+
This pin is the module output positive pole
6,7
NC
Reserve fixed pin


Electrical characteristics

1. Absolute maximum rating parameter


No
Parameter
Symbol
Min
Max
Unit
1
Input DC voltage
VCC
42
57
V
2
DC Voltage Surge 1ms
VSURGE
-0.6
80
V
3
Ambient temperature
TS
-40
80
* Exceeding the above rating may cause permanent damage to the product. Functional operations under these conditions are not recommended.

● Recommended working conditions


No
Parameter
Symbol
Min
Typ
Max
Unit
1
Input DC voltage
VIN
42
48
57
V
2
Low pressure input threshold
VLOCK
37
-
-
V
3
Ambient Temperature
TOP
-40
25
80
* Applicable only to WC-PD25C012A maximum operating temperature.

● DC Characteristic


No
Parameter
Symbol
Min
Typ
Max
Unit
Test conditions
1
Standard Output Voltage
VDC
11.75
12
12.2
V
VIN=48V      Tc:25℃
2
Output Current(VIN=48V)
PWR
-
2
-
A
Wide voltage input 42-57V
3
Power adjustment rate
VLINE
-
0.1
-
%
@50% Load
4
Load Adjustment Rate
VLOAD
-
1
-
%
@VIN=48V
5
Ripple Output Noise
VRN
-
200
250
mVp-p
@Maximum Load
6
Minimum Load
RLOAD
10
-
-
mA
7
Short circuit duration
TSC
-
-
sec
8
Efficiency (load 80%)
EFF
82
87
-
%
9
Isolation Voltage (I/O)
VISO
-
-
1500
VPK
10
Temperature Coefficient
Tc
-
0.02
%
Per ℃
11
Transient Rresponse
Ts
-
100
250
ms
VIN=48V   VOUT=max
* Typical number is 25℃, nominal voltage is 48V, for auxiliary design only;
* Output ripple and noise can be reduced by an external filter, see the application instructions;
* If operated under the specified minimum load, the module will emit sound noise, which may cause repeated hiccups in the PSE.



● Functional Description

1. Input:
* The input terminal of WC-PD25C012A is not preset with "bridge reactor", so it is necessary to pay attention to the polarity of power supply core.




2. PD Power Supply Agreement
* When the module is connected to the cable, it will automatically provide the Power Device (PD) signature to the PSE when needed. The PSE recognizes that the PD is connected to that line and provides power.




3. Power Classification:
* WC-PD25C012A uses IEEE802.3at(backward compatible with AF) standard and runs with Class 4 (24W) power rating by default.


Define criteria
Cable requirements
Grading parameters
Power Supply Characteristics


IEEE802.3at
(PoE Plus)


CAT5 cable or CAT6
cable

Maximum power required for Class4 devices is 13W~25.5W
1. The DC voltage ranges from 42 to 57V, with a typical value of 48V.
2. Typical operating current is 10~600mA; typical output power: 25.5W.
3. Class4 rating supported by electrical equipment.







IEEE802.3af
(PoE)







CAT5 cable
Maximum power required for Class0 devices is
0~12.95W




1. The DC voltage ranges from 38 to 57V, with a typical value of 48V.
2. Typical operating current is 10~350mA; typical output power: 15.4W;
3. The overload detection current is 350~500mA.
4. Provide 4 Class Power Requests for PD Devices ranging from 3.84 to 12.95W
The maximum power required for Class1 devices
is 0~3.84W
The maximum power required for Class2 devices
is 3.85W~6.49W
The maximum power required for Class3 devices
is 6.5W~12.95W


● Typical Connection Diagram






Welcome to customize POE modules with various sizes and appearance functions.
According to the requirements of the drawing board, research and development fees will be charged in the early stage. After ordering a certain number of modules (usually 1000 pieces), the research and development fees can be deducted from the payment. Wait until the samples are qualified before mass production.














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