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25. Onboard Power Supplies
Power supply circuitry on the board generates 1.2V, 1.25V, 1.2V (MGT), 1.5V, 1.8V, 2.5V,
and 3.3V voltages to power the components on the board. The 1.2V, 1.5V (digital), 2.5V, and
3.3V supplies are driven by switching power regulators. When these switching regulators
report they are running at their nominal voltages, the PWR Good LED turns on.
The diagram in
handling on each supply. The typical operating currents are significantly below the
maximum capacity. The ML405 board normally ships with a 30W power supply that
should be sufficient for most applications.
Special analog voltage regulators on the board produce a clean 1.2V and 1.5V (analog)
supply circuitry for the MGT. A separate 3.3V analog regulator produces a clean analog
3.3V power supply for the video DAC.
26. AC Adapter and Input Power Switch/Jack
The ML405 board ships with a 30W (5V @ 6A) AC adapter. The power connector is a
2.1 mm x 5.5 mm barrel type plug (center positive). For applications requiring additional
power, such as the use of expansion cards drawing significant power, a larger AC adapter
might be required. If a different AC adapter is used, its load regulation should be less than
10% or better than ± 10%. The power switch turns the board on and off by controlling the
supply of 5V to the board.
27. Power Indicator LED
The PWR Good LED lights when the 1.2V, 1.5V, 2.5V, and 3.3V power supplies are all at
their nominal operating conditions. If the PWR Good LED is off, blinking, or glowing
lightly, a fault condition, such as a short or overload condition, might exist.
ML405 Evaluation Platform
UG210 (v1.5.1) March 10, 2008
Figure 1-4
shows the power supply architecture and maximum current
5V to USB and PS/2
TPS54610
6A SWIFT
TPS54610
6A SWIFT
5V Brick
6.5A
TPS54610
6A SWIFT
TPS73118
150 mA LDO
TPS73633
400 mA LDO
TPS54610
6A SWIFT
Figure 1-4: Power Supply Diagram
www.xilinx.com
TPS51100
3A DDR LDO
2.5V
2.5V to DDR SDRAM
UC385
1.5V (Digital)
5A Linear
MAX8556/7
3.3V
4A Linear
to FPGA I/O
1.8V
to PROM
3.3V
to VGA DAC
1.2V
to FPGA Core
Detailed Description
1.25V
to VTT
1.5V (Analog)
to FPGA MGTs
1.2V
to FPGA MGTs
1.5V (Digital)
UG210_04_061406
27
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