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Chapter 1: ML628 Board Features and Operation
The ML628 board uses power regulators and PMBus compliant digital PWM system
controllers from Texas Instruments to supply the core and auxiliary voltages listed in
Table 1-1 . The board can also be configured to use external bench power supply for each
voltage. See Using External Power Sources .
Table 1-1:
Onboard Power System Devices
Device
Reference
Designator
Description
Power Rail
Net Name
Typical
Voltage
Power
Regulation
Jumper
External
Supply
Jack
Core voltage controller and regulators
UCD9240PFC
U8
PMBus compliant digital PWM
system controller (address = 52)
PTD08A020W
U10
Adjustable switching regulator
VCCINT 1
1.0V
J102
J223
20A, 0.6V to 3.6V
PTD08A020W
U41
Adjustable switching regulator
VCCINT
1.0V
J61
J440
20A, 0.6V to 3.6V
(VCCINT_B)
PTD08A020W
U12
Adjustable switching regulator
VCCAUX
2.5V
J104
J227
20A, 0.6Vto 3.6V
PTD08A020W
U13
Adjustable switching regulator
VCCO
2.5V
J105
J98
20A, 0.6V to 3.6V
Auxiliary voltage controller and regulators
UCD9240PFC
U19
PMBus compliant digital PWM
system controller (address = 53)
PTD08A020W
U23
Adjustable switching regulator
VCC2V5
2.5V
J31
J175
20A, 0.6V to 3.6V
PTD08A020W
U22
Adjustable switching regulator
VCC3V3
3.3V
J30
J174
20A, 0.6V to 3.6V
5V auxiliary power
PTV12020WAH
U31
Switching regulator
VCC5
5.0V
J129
J173
13A, 5.0V
Notes:
1. The UCD9240PCF (U8) synchronizes the PTD power stages (U10 and U41) so that a maximum of 40A can be supplied to the
VCCINT rail
Using External Power Sources
The maximum output current rating for each power regulator is listed in Table 1-1 . If a
design exceeds this value on any power rail, power for that rail must be supplied through
the external power jack using a supply capable of providing the required current.
Each power rail has a corresponding jack and jumper that is used to supply voltage to the
rail using an external power supply. The jack, jumper, and regulator for each power rail is
listed in Table 1-1 .
Caution! The power regulation jumper (see Power Regulation Jumper column in Table 1-1 )
must be removed before applying external power to the power rail through its corresponding
supply jack.
Caution! The external power supply jacks have a maximum current rating of 15A.
12
www.xilinx.com
ML628 Board User Guide
UG771 (v1.1) February 19, 2014
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