02.
PRODUCTS
Product Series
- Non-isolated DC-DC Converters
- Isolated DC-DC Converters
- PoE Power Module
- AC-DC Power Modules
- Low Voltage Brick
-
High Voltage brick
Sales：
+86-21-51095021
online support
Home > Product Series > MQ7804bt
MQ7804bt
MQ7804bt
Isolated 42~57VDC input, single output, 72W DC-DC Converter with PoE bt interface
- Product
- Product Features
- Applications
The POE MQ7804bt/ MQ7814bt series of modules are designed to extract power from a conventional twisted pair Category 5 Ethernet cable, conforming to the IEEE 802.3bt Power-over-Ethernet (PoE) standard but with 72W output power. The MQ7804bt series of modules embedded 2 active rectifier bridges which extremely reduce the power dispassion comparing with the traditional Schottky diodes bridges, have two pairs of power inputs pins: - VA1&2 and VB1&2 to accommodate high power PoE application with 4-pair wire power transfer.
In some applications, the input polarity is certain, or there is an external rectifier bridge, the MQ7814bt series modules are more cost effective options; compare with MQ7804bt series, MQ7814bt series products have exactly the same performance except the embedded 2 active rectifier bridges removed.
The MQ7804bt/ MQ7814bt signature and control circuit provides the PoE bt compatibility signature and power classification required by the Power Sourcing Equipment (PSE) before applying up to power to the port. The MQ7804bt/ MQ7814bt can be set to class4 to class 8 by external one classification resistor to get different power class from PSE.
The high efficiency DC/DC converter operates over a wide input voltage range and provides a regulated low ripple and low noise output. The DC/DC converter also has built-in overload and short-circuit output protection.
