LM10520 Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – 20A Adaptive Voltage Scaling (AVS) Evaluation Board

LM10520 20A Adaptive
Voltage Scaling (AVS)
Evaluation Board
National Semiconductor
Application Note 2058
Mark Hartman
November 2, 2010
General Description
The LM10520 is a single-phase Energy Management Unit
(EMU) that actively reduces system-level power consumption
by utilizing a continuous, real-time, closed-loop Adaptive Volt-
age Scaling (AVS) scheme. The AVS technology enables
optimum energy management delivery to the load in order to
maximize system-level energy savings.
The LM10520 evaluation board is capable of delivering up to
20A with an output voltage range of 0.6V - 1.2 V. It includes
a DOSA compatible edge connector to enable convenient
evaluation of AVS on a high performance ASIC or FPGA
which typically require between 10A - 20A. Most of the fea-
tures of the device can be accessed through jumper settings
and the PWI interface.
The LM10520 evaluation kit ships with 2 adaptor boards. The
PWI2USB board allows connection to a PC for GUI control of
the device. The AVS adaptor board stacks on top of the US-
B2PWI board and provides a header to connect to the
LM10520. The AVS adaptor board also provides power con-
nectors to conveniently apply high current loads and high
voltage inputs that USB can not provide.
Operation Range
Parameter
Min
Max
PVIN
∼5
14
IPVIN
∼3
AVIN*
4.75
5.25
IAVIN
100
VOUT
0.72
1.2
IOUT
0
20
* AVIN improves efficiency, but is not required.
Units
V
A
V
mA
V
A
Features
• Closed-loop/Adaptive Voltage Scaling (AVS)
• PWI 1.0/PWI 2.0 compatible
• Startup with a pre-biased output load
• Adjustable soft-start/tracking support
• PGOOD flag and shutdown
• Under Voltage Lock Out (UVLO)
• Over Voltage Protection (OVP)
• Ability to synchronize switching frequency
• Cycle-by-cycle current limiting
• Thermal Shutdown
Applications
• Point of Load regulation
• Servers and networking cards
• Set-top-box processors
• Video processors and graphic cards
• Medical and industrial processors
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