CY3272 Cypress Semiconductor Corp, CY3272 Datasheet - Page 14

• Manufacturer Part Number: CY3272
• Description: KIT EVAL POWERLINE HIGH VOLT
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY3272

• Main Purpose: Interface, Transceiver, Powerline Communication
• Embedded: No
• Utilized Ic / Part: CY8CPLC10
• Primary Attributes: 2400bps Data Transfer Over High Voltage Power Lines
• Secondary Attributes: LED Status Indicators
• Silicon Manufacturer: Cypress
• Silicon Core Number: CY8CPLC10
• Kit Application Type: Communication & Networking
• Application Sub Type: High Voltage Powerline Communication
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 428-3008

PLC HV Evaluation Board
2.3.3
14
Table 2-2. Transmit Amplifier and Filtering
The key components are circled in the following schematic.
Figure 2-3. Coupling Circuit Schematic
Transmit and Receive Coupling Circuit
This circuit couples the signal from the board on to the powerline. On the receive side, the same cir-
cuit couples the carrier on the powerline in to the board, while filtering out the actual 50 Hz or 60 Hz
power. The isolation transformer is required for safety.
The key components in this section are as follows:
Table 2-3. Transmit and Receive Coupling Circuit
The key components are circled in the following figure.
U2, U3
U4, Q1, Q2
T1
C9
Component
Component
CY3272 Cypress High Voltage Powerline Communication Evaluation Kit Guide, Doc. # 001-55381 Rev. *C
These opamps filter the signal from the CY8CPLC10, removing the harmonics. The filter
stages are only required to meet the European CENELEC EN50065-1:2001 signaling speci-
fication. They are not required to achieve robust PLC communication
This opamp and high gain transistors are used in the power amplification stage.
This is the isolation transformer that isolates the HV and LV sections of the board. It has
a 1:1 turns ratio.
This is the coupling capacitor which couples the communication signal and filters out the
low frequency noise. The voltage and X1/X2 safety ratings of this component are impor-
tant parameters.
Description/Comment
Description
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