AMD XILINX VEK280 - Monitoring Voltage and Current

3/20/24, 12:51 PM
Unofficial Document
https://docs.amd.com/internal/api/webapp/print/d54fa025-f5b0-4797-be6e-41b3e31f9548
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Rail Name Regulator Type Ref. Des. Vout (V) Iout (A)
VCC12_SW SW13 12 Up to
50A
UTIL_3V3 IR3889 U190 3.3 12
UTIL_5V0 IR3889 U191 5 6
SYS_VCC0V85 TPS62480 U143 0.85 5
SYS_MGTAVCC TPS62097RWKR U146 0.9 1
SYS_VCC1V1 TPS7A8300ARGRR U145 1.1 1
SYS_VCC1V2 TPS62097RWKR U147 1.2 2
SYS_VCC1V8 TPS62097RWKR U144 1.8 1
Note: VCC12_SW is disabled when using ATX 12V (6+2) input. Refer to the
description in the Power On/Off Slide Switch introduction.
More information about the power system regulator components can be found at
the Infineon Integrated Circuits website.
Monitoring Voltage and Current
Nineteen rails have a TI INA226 PMBus power monitor circuit with connections to
the rail series current sense resistor. This arrangement permits the INA226 to report
the sensed parameters separately on the PMBus. The rails equipped with the
INA226 power monitors are shown in the power system table in Board Power
System. As described in PMC MIO[46:47] I2C0 Bus, the I2C0 bus provides access to
the PMBus power controllers and the INA226 power monitors via the U33
TCA9548A bus switch. All PMBus controlled Infineon regulators are tied to the
PMBUS_SDA/SCL PMBus, while the INA226 power monitors are split across
PMBUS1_INA226_SDA/SCL and PMBUS2_INA226_SDA/SCL.
The I2C0 bus topology figure and I2C0 port expander TCA6416A U233 address
0x20 connections table in PMC MIO[46:47] I2C0 Bus document the I2C0 bus
access path to the Infineon PMBus controllers and INA226 power monitor op amps.
For connectivity details, see the schematic, which can be accessed through the
VEK280 Evaluation Board website. These power system components are also
accessible to the ZU4 U125 system controller (bank 501) and the Versal device U1
(bank 501).