Texas Instruments TIDA-010046, Design Manual

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TIDA-010046
PD Side Board
Clock Source Status LEDs
MSP430
Pin Headers
(MAC)
DP83825
10/100MBPS
ETH PHY
Internal Loop-Back
External Loop-
Back
DP83825
10/100MBPS
ETH PHY
DP83822
10/100MBPS
ETH PHY
RMII
RMII
TIDA-010046
PSE Side Board
Ethernet
Cable
R
J
4
5
x
x
x
x
x
MSP430
x
x
x
x
x
Power + Data Out
ESD
Diode
Array
ESD
Diode
Array
ESD
Diode
Array
ESD
Diode
Array
TVS
Diode
Array
TVS
Diode
Array
R
J
4
5
ESD
Diode
Array
ESD
Diode
Array
Clock Source Status LEDs Status LEDs
TPS23861
PSE
TPS7A4001 LDO
(48 V to 3.3 V)
LP5907 LDO
(5 V to 3.3 V)
LP5907 LDO
(5 V to 3.3 V)
TPS7A26 LDO
(12 V to 3.3 V)
TPS2121
Power MUX
Isolation
Barrier Isolation
Barrier
Isolation Barrier
PRBS ON
48 V RTN
TVS
Diode
Array
MDC
MDIO
MDIO
MDC
0 … F
5 V
LM5160
Iso. Fly- %XFNŒ
(12 V to 3.6 V)
+12V_IN
LM3478
Boost DC/DC
(12 V to 48 V)
+48V
TVS
Diode
Array
TVS
Diode
Array
+48 V
TVS
Diode
Array
RTN
Power
R
J
4
5
TPS23755
Powered Device (PD) with
Integrated DC/DC
12 V_PoE +12V_IN
+12V_OUT
3.3 V for ETH PHY & MSP
MDIO
MDC
3.3 V
for
MSP430
3.3 V
for ETH
PHYs
USB
USB
1 TIDUES1A – October 2019 – Revised February 2020
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Copyright © 2019–2020, Texas Instruments Incorporated
EMC Compliant 10/100-Mbps Ethernet PHY Reference Design With IEEE
802.3at Type-1 ( ≤ 12.95 W) PoE-PD
Design Guide: TIDA-010046
EMC Compliant 10/100-Mbps Ethernet PHY Reference
Design With IEEE 802.3at Type-1 (
≤ 12.95 W) PoE-PD
Description
This reference design provides a cost-optimized
solution for 10 to 100 Mbps using the low-power
Ethernet physical layer (PHY) DP83825I supporting
150-m reach over CAT5e cable which is beyond the
standard Ethernet distance limitation of 100 m (328
feet). Also, demonstrating power delivery over
Ethernet cable along with data communication using
IEEE 802.3at Type-1 (13 W) PoE-PD TPS23755
device with integrated primary side regulated flyback
DC/DC controller. This reference design is pre-
compliance tested for radiated emissions, ESDs and
EFTs.
Resources
TIDA-010046 Design Folder
DP83825I , DP83822I Product Folder
TPS23755 , TPS2121 Product Folder
ESDS312 Product Folder
TPS7A26 , TPS23861 , TPS7A4001 Product Folder
MSP430F5529 Product Folder
TPD2E001 Product Folder
LM3478 , LP5907 , LM5160 Product Folder
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Features
• Based on low-cost, low-power consumption and
small form-factor 10/100 Mbps Ethernet PHY
DP83825I with RMII support and 150-m cable
reach
• Efficient power delivery system via power over
Ethernet (PoE) using IEEE 802.3at Type-1 PoE-
PSE and PoE-PD
• Pre-compliance tested for radiated emission
requirement:
– CISPR 22 (EN 55022): meets Class A and B
limits
– FCC Part 15: meets Class A and B limits
• Pre-compliance tested for conducted immunity
requirements:
– ±12-kV contact discharge and ±15-kV air
discharge ESD IEC 61000-4-2: meets
criterion B
– ±2-kV IO capacitive coupling EFT per IEC
61000-4-4: meets criterion B
• External isolation transformer with common-mode
choke on PHY side for improved EMI and EMC
performance
• Programmable LED support for link and activity
Applications
• Video Surveillance
• Building Security Systems
• Fire Safety Systems
• HVAC (Heating, Ventilation and Air Conditioning)
An IMPORTANT NOTICE at the end of this TI reference design addresses authorized use, intellectual property matters and other
important disclaimers and information.