DC2022A - Demo Manual

DEMO MANUAL DC2022A
LTC2975
4-Channel Power Supply System Featuring the Power
System Manager with Input Energy Accumulation
Description
The DC2022A is a demonstration system that showcases
the LTC®2975, a 4-channel I2C/SMBus/PMBus power
system manager with EEPROM. The LTC2975 monitors
and controls four power supply rails. The LTC2975 also
monitors input current and input voltage, which are used
to calculate input power and accumulate energy. The
DC2022A demonstrates the ability of the LTC2975 to sequence, trim, margin, supervise, monitor, and log faults
for four power supplies. Each power supply channel’s
output voltage is monitored and the LTC2975 monitors
its own internal die temperature.
The DC2022A is a single circuit board that contains four
independent power supply rails. The board employs four
LTC3405A 300mA switch-mode regulators, which are
configured to be controlled by the LTC2975. The DC2022A
demo board provides a sophisticated 4-channel digitally
programmable power supply system. The rail voltages
are programmable within the trim range shown in the
Performance Summary table.
This demonstration system is supported by the LTpowerPlay™ graphical user interface (GUI) which enables
complete control of all the features of the device. Together,
the LTpowerPlay software and DC2022A hardware system
create a powerful development environment for designing
and testing configuration settings of the LTC2975. These
settings can be stored in the device’s internal EEPROM or in
a file. This file can later be used to order pre-programmed
devices or to program devices in a production environment. The software displays all of the configuration settings and real time measurements from the power system
management IC. Telemetry allows easy access and decoding of the fault log created by the LTC2975. The board
comes pre-programmed with the EEPROM values appropriate for the four power supply rails on the DC2022A.
Just plug and play!
Multiple DC2022A boards can be cascaded together to form
a high channel count power supply (see the Multi-Board
Arrays section). This cascaded configuration demonstrates
features of the LTC Power System Management ICs which
enable timing and fault information to be shared across
multiple power system management ICs. The user can
configure up to eight DC2022A boards, thereby controlling
up to 32 separate power supply rails. Larger board arrays
can be built using programmable I2C base addresses or
bus segmentation.
The DC2022A demo board can be powered by an external
power supply, such as a +12VDC supply. Communication
with the software is provided through the DC1613 USB-toI2C/SMBus/PMBus Controller. The following is a checklist
of items which can be obtained from the LTC website or
LTC Field Sales.
USB-to-I2C/SMBus/PMBus Controller (DC1613)
n
LTpowerPlay Software
n
Design files for this circuit board are available at
http://www.linear.com/demo/DC2022A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
dc2022af
1
DEMO MANUAL DC2022A
Features
Sequence, Trim, Margin, and Supervise Four Power
Supplies
n
Manage Faults, Monitor Telemetry, and Create Fault
Logs
n
Supports Multi-Channel Fault Management
n
Automatic Fault Logging to Internal EEPROM
n
Operates Autonomously without Additional SW
n
Telemetry Reads Back VIN, VOUT, and Temperature
PMBus Compliant Command Set
n
Supported by LTpowerPlay GUI
n
Margin or Trim Supplies to 0.25% Accuracy
n
Four IOUT and One IIN Monitor
n
n
4-Channel Time-Based Output Sequencer
n
I2C/SMBus Serial Interface
n
Powered from 6V to 14V
n
Input Power Measurement and Energy Accumulation
n
LTC2975 Available in 64-Lead QFN Package
n
Fast OV/UV Supervisors per Channel
n
Performance
Summary
over full operating temperature range.
Specifications are at TA = 25°C. Common characteristics specifications valid
POWER SUPPLY CHANNEL
CH(0:3)
Manager/Controller
LTC2975
Nominal Untrimmed Output Voltages
1.5V, 1.8V, 2.5V, 3.3V
Rated Output Current
0.3A
Default Margin Range
±5%
Output Trim Range (VFS_VDAC = 1.38V)
+15%/–11%
Temperature
±1°C Internal
Common Characteristics
PARAMETER
CONDITIONS
Supply Input Voltage Range
6
ADC Total Unadjusted Error
VIN_ADC ≥ 1V
ADC Voltage Sensing Input Range
Differential Voltage: VIN_ADC = (VSENSEP[n] – VSENSEM[n])
2
MIN
0
TYP
MAX
UNITS
14
V
±0.25
%
6
V
dc2022af
DEMO MANUAL DC2022A
Glossary of Terms
The following list contain terms used throughout the
document.
Channel – The collection of functions that monitor, supervise, and trim a given power supply rail.
EEPROM – Non-volatile memory (NVM) storage used to
retain data after power is removed.
Margin – Term used typically in board level testing that
increases/decreases the output voltage to look for sensitivity/marginality problems.
Monitor – The act of measuring voltage, current, and
temperature readings.
NVM – Non-volatile memory, see EEPROM.
PMBus – An industry standard power-management protocol with a fully defined command language that facilitates
communication with power converters and other devices
in a power system.
Rail – The final output voltage that the power supply
controller manages.
Supervise – The act of quickly responding (warning or
faulting) to a voltage, current, temperature condition that
is compared to pre-programmed values.
Trim – The act of adjusting the final output voltage. A servo
loop is typically used to trim the voltage.
dc2022af
3
DEMO MANUAL DC2022A
LTpowerPlay GUI Software
LTpowerPlay is a powerful Windows-based development
environment that supports Linear Technology power
system management ICs with EEPROM, including the
LTC2975 4-channel PMBus power system manager. The
software supports a variety of different tasks. You can
use LTpowerPlay to evaluate Linear Technology ICs by
connecting to a demo board system. LTpowerPlay can
also be used in an offline mode (with no hardware present) in order to build a multi-chip configuration file that
can be saved and re-loaded at a later time. LTpowerPlay
provides unprecedented system level diagnostic and debug
features. It becomes a valuable diagnostic tool during
board bring-up to program or tweak the power manage-
ment scheme in a system or to diagnose power issues
when bringing up rails. LTpowerPlay utilizes the DC1613
I2C/SMBus/PMBus Controller to communicate with one
of many potential targets, including the DC2022A demo
system or a customer board. The software also provides
an automatic update feature to keep the software current
with the latest set of device drivers and documentation.
The LTpowerPlay software can be downloaded from:
http://www.linear.com/ltpowerplay
To access technical support documents for LTC Power
System Management Products visit "Help, View Online
help" on the LTpowerPlay menu.
Figure 1. Screenshot of the LTpowerPlay GUI
4
dc2022af
DEMO MANUAL DC2022A
Quick Start Procedure
The following procedure describes how to set up a DC2022A
demo system.
6.Launch the LTpowerPlay GUI.
1.Download and install the LTpowerPlay GUI:
www.linear.com/ltpowerplay
a. The GUI automatically identifies the DC2022A and builds
a system tree for each power manager. The system tree
on the left hand side will look as shown below.
2.Remove the board from the ESD protective bag and
place it on a level surface. Connect the DC1613 I2C/
SMBus/PMBus Controller to the DC2022A board using
the 12-pin ribbon cable.
Note: For multiple board arrays, the GUI automatically
ensures each device has a unique address. In this
scenario, it is recommended at this point to store these
addresses to NVM (EEPROM) by clicking the RAM to
3.Confirm that the CONTROL switch is set to the RUN
position.
NVM icon in the toolbar.
4.Plug the USB-to-I2C/SMBus/PMBus Controller into a
USB port on your PC. The board should power up with
all power good LEDs and 5V LED illuminated green. The
USB-to-I2C/SMBus/PMBus Controller supplies ~100mA
of current which should be sufficient for a single demo
board.
5.If multiple boards are being powered, connect a +12VDC
power supply with > 0.5A capacity to the VIN input jack
of the DC2022A.
Figure 2. Connecting DC2022A Board and the DC1613 I2C/SMBus/PMBus Controller
dc2022af
5
DEMO MANUAL DC2022A
Quick Start Procedure
b.A green message box will be displayed momentarily in
the lower left hand corner confirming that the DC2022A
is communicating.
7.The CONTROL switch is configured to control all 4 channels. Slide the switch to RUN to enable, OFF to disable
all channels. For multiple board arrays, the CONTROL
switch is wired to a signal that is common across all
boards. All CONTROL switches must be set to the RUN
position to enable all boards.
Loading a DC2022A Configuration (*.proj) File with
the GUI
1.In the upper left hand corner of the GUI, File > Open
> browse to your *.proj file. This will load the file into
the GUI.
2.Click on the Go Online icon
c. Save the demo board configuration to a (*.proj) file
by clicking the "Save" icon. This creates a backup file.
Name it whatever you want.
. This loads the configuration into
PC->RAM icon
the working RAM of the LTC2975.
3.To store the configuration to NVM (EEPROM), click on
the RAM->NVM icon
6
, then click on the
.
dc2022af
DEMO MANUAL DC2022A
Details - Top Side
Figure 3. DC2022A Top Side Details
dc2022af
7
DEMO MANUAL DC2022A
Common Demo Board Operations
Margin All Rails
The LTC2975 power manager on the DC2022A not only
monitors each of the four outputs but can margin the
outputs either high or low. Margining is the operation that
moves a rail either up or down for testing purposes. It allows a system to be fully characterized over supply limits
without the use of external hardware or resources. The
GUI provides an easy way to margin all rails high or all low
by clicking one of four buttons. To invoke the margining
in the toolbar. The
dialog, click the GroupOp icon
buttons labeled “ignore faults” will margin without creating
a fault even if the fault limits are exceeded.
A look at the telemetry window shows the effect of the
margin high or margin low operation. The following screen
shot shows all rails going from nominal setpoints to margin
high, margin low, and back to nominal voltages.
The LTC2975 has a multiplexed ADC that is used to provide
voltage, current, and temperature readback values. The
telemetry plot in the GUI is similar to a multi-channel oscilloscope which is capable of displaying any parameter that
is displayed in the telemetry window. Due to the nature of a
multiplexed ADC converter, it has an associated ADC loop
time. The total ADC loop time (~100ms to 160ms) for a
given channel is dependent on the device’s configuration.
Creating a Fault
There is a pushbutton on the DC2022A board that is used
to force a fault and demonstrate the demo board’s ability
to detect it and respond according to the configuration.
When depressed, the pushbutton creates a fault (short
to ground) on channel 3, the 3.3V output (GUI channel
U0:3). The user should see all outputs power off, the
fault LED momentarily illuminate, the alert LED illuminate
continuously, and all rails sequence back on after a retry
period. The user may also short any power supply output
indefinitely. This is a good way to induce UV faults and
shows that a shorted channel will not be damaged. Use a
jumper wire or a coin to short any output.
Clearing a Fault
in the
To clear a fault, the user may click the CF icon
GUI or simply push the RESET pushbutton on the demo
board. In both cases, the red (+) on the CF icon and alert
LED on the board will be cleared. You will notice that all
rails are automatically re-enabled after a programmable
retry period. The alert LED may be cleared by clicking the
8
dc2022af
DEMO MANUAL DC2022A
Common Demo Board Operations
clear faults (CF) icon in the GUI. After clearing faults, the
system tree may remain yellow if any non-volatile fault
logs are present. For further information, see the Working
with the Fault Log section.
Resetting the DC2022A
A reset pushbutton is provided on the board. To reset all
devices on the DC2022A board and reload the EEPROM
contents into operating memory (RAM), press RESET
(SW1) on the DC2022A.
DC2022A LEDs
Each individual channel on DC2022A also has its own green
power good LED (CH0 through CH3). When USB power
(DC1613 Controller) or external power (6V to 14V jack) is
applied, the +5V green LED will illuminate, indicating that
the LTC2975 power system manager is powered. The red
LEDs will illuminate when an alert or a fault has occurred.
Sequencing Output Channels
The LTC2975 has been pre-configured with different
TON_DELAY values for each channel. The TON_DELAY
parameter is applied to each device relative to the respective
CONTROL pin. When multiple demo boards are connected
together, all CONTROL pins are wire OR’d. Therefore the
TON delays are enforced relative to one edge. The same
applies to TOFF_DELAY values. When the CONTROL
switch is set to the OFF position, all rails will power down
sequentially based on each of the device’s TOFF_DELAY
values. Figure 4 shows an oscilloscope screen capture of
three output rails sequencing up and down in response
to the CONTROL pin.
Each channel has an LED which visually indicates if the
channel has power. When the CONTROL pin is switched
on and off, you will observe the relative on/off timing of
the 4 channels. For the LTC2975, the TON_DELAY and
TOFF_DELAY values are limited to 655ms.
CONTROL
CH2, 2.5V
CH1, 1.8V
CH0, 1.5V
Figure 4. Sequencing Output Channels with DC2022A Using TON_DELAY and TOFF_DELAY
Figure 5. TON_DELAY Configuration
Figure 6. TOFF_DELAY Configuration
dc2022af
9
DEMO MANUAL DC2022A
Common Demo Board Operations
“Why Am I Off?” Tool
Use the “Why am I Off?” tool in the LTpowerPlay GUI to
diagnose the reason a power supply channel is turned off.
The tool can be located in the top right corner of the GUI,
above the “Register Information” tab. Hover your cursor
over this tab to show the tool.
Figure 7. "Why Am I Off” Tool in the LTpowerPlay GUI
Advanced Demo Board Operations
What Is a Fault Log?
A fault log is a non-volatile record of the power system
leading up to the time of fault. It holds the most recent
monitored values (uptime, voltage, current, temperature)
that can be analyzed to help determine the cause of the
fault. It is a powerful diagnostic feature of the LTC2975
on the DC2022A demo board.
Create a Fault Log
To create a fault log, you must create a fault, as described
in the Creating a Fault section. If multiple boards are
configured, select the appropriate device in the system
tree by clicking on the appropriate LTC2975 chip. We will
proceed to work with the fault log.
Working with the Fault Log
Once a fault has occurred, the fault log (FL) icon
will show a red (+) sign on it, indicating that the GUI has
detected a fault log in the device. Clicking the icon will
bring up a dialog box. Note that it is context sensitive. If
10
multiple DC2022A boards are connected, be sure that the
desired device is selected in the system tree.
Notice that the checkbox “Log to EEPROM on Fault” is
checked. Once a fault occurs, the device will automatically
write the fault log data to EEPROM (NVM). At this point,
the log is locked and will not change until it is cleared
by the user. To read the EEPROM log data, first click the
“EEPROM to RAM” button. At this point the RAM Log is
locked and not updated even though the telemetry readings continue. Click the “Read NVM Log” button. The log
data will appear in the text box below.
dc2022af
DEMO MANUAL DC2022A
Advanced Demo Board Operations
The log contains timestamp, up-time, channel voltage
readings, an input voltage reading, an on-chip temperature
reading, etc. There will be a number of loops; each loop
contains data obtained in one ADC loop time with the
most recent ADC loop data on top and the oldest data at
the bottom of the log. The up-time indicates, at the time
of fault, the amount of time the device had been powered
up or time since the previous reset.
In this case, the fault log will show that channel U0:7
faulted due to a VOUT_UV_FAULT condition. On the previous telemetry loop, the channel voltage reading was a
nominal value (3.3V).
To clear the fault log, click the “Clear/Rearm EEPROM
Log” button. This allows the selected device to be ready
for a new fault event. To clear all faults, click the clear
faults (CF) icon.
dc2022af
11
DEMO MANUAL DC2022A
Advanced Demo Board Operations
Fault Sharing Setup in the GUI
Fault sharing provides a means of propagating a fault
detected by a power manager to other power managers
via FAULT pins. Use the Fault Sharing Setup Tool to configure the fault sharing in the GUI. Select the LTC2975 in
the system tree. Go to Utilities > Fault Sharing Diagram.
For more details on this topic, please refer to the Fault
Management section in the data sheet.
The fault sharing dialog will appear as shown in Figure 8.
All Response and all Propagate switches are closed by
default. In this configuration, a fault on a channel will
shut down all LTC2975 channels, and a fault on any given
channel will propagate to all channels on the DC2022A
demo board since the fault pins are tied together.
NOTE: All FAULT pins of the LTC2975 are tied together on
the DC2022A demo board. These pins are open drain and
have a common pull-up resistor to provide a logic high
level (inactive). All FAULT pins are active low.
There are two types of actions to fault conditions: How a
channel responds to another channel’s fault and whether
a particular channel propagates its fault to other channels.
FAULT pins are bi-directional, meaning the device may
drive its fault pin low (output) or may respond to the fault
pin when another device drives it low (input). Because all
fault pins are wire OR’d on the DC2022A, this hardware
configuration allows one to program each device’s fault
settings on a channel-by-channel basis. By default, the
LTC2975 is configured to shut down its channels if other
devices fault and to propagate its own fault via the FAULT
pins. A fault on these channels will cause only that channel to fault off. You can think of the response switches as
“shut this channel down when another channel faults,” and
the propagate switches as “drive a fault pin to broadcast
to other channels that this channel faulted."
Figure 8. Fault Sharing Utility in LTpowerPlay GUI
12
dc2022af
DEMO MANUAL DC2022A
Advanced Demo Board Operations
Fault Configuration Example
Let’s explore two different examples. Suppose we do not
want channel U0:0 (CH0 1.5V rail) to propagate its fault
to the other channels when it faults. And suppose we do
not want channel U0:1 (CH1 1.8V rail) to shut down in
response to another channel’s fault. We can configure the
switches as shown in Figure 9. Simply click the switches
to open/close. Click OK to close the dialog box. Click the
PC->RAM icon to write the changes to the DC2022A.
We can now create a fault on U0:0 (CH0) by shorting
the output to ground. You may use a coin or a jumper
to temporarily connect CH0 to the GND turret. You will
notice that the channel shuts off but the other channels
remain powered up because its fault is not propagated to
the other channels. After the retry period, channel U0:0
(CH0) will power back up. We can now observe the effect
of changing the response setting on U0:1 (CH1). If you
short U0:3 (CH3 3.3V rail) to ground, notice that all rails
shut down except U0:1 (CH1). This is an example of a
keep-alive channel that remains powered up independent
of faults to other channels.
Energy Metering
In the LTC Power System Manager family, the LTC2975
employs a new feature: high-side current sensing of the
input power supply. This feature allows the manager to
measure input supply current. The manager also measures
Figure 9. Updated Fault Sharing Configuration
dc2022af
13
DEMO MANUAL DC2022A
Advanced Demo Board Operations
input supply voltage and is therefore able to report input
power as well. Since energy is the product of power and
time, accumulated energy is provided based on the manager’s internal time base.
The meter displayed in the upper right hand corner of the
GUI provides a number of bits of information. The needle
is a real-time indicator of input power and the smaller 5
dials show the total accumulated energy similar to a home
electricity meter.
The DC2022A demo board does not have power supplies
that are capable of high current. However, conceptually the
LTC2975 is able to monitor and measure an entire large
power system with ease. LTpowerPlay offers a simple and
easy to understand interface that brings together input
and output current, voltage, power, and energy readings.
channels by switching the RUN switch to off. You will notice
that the slope has changed. The accumulated energy rate
is the slope. Energy is still being consumed to power the
LTC4415 power switch and the LTC2975 power manager.
Note that the input current has changed from about 40mA
down to 17mA as seen in the READ_IIN register. The
MFR_EIN_WATTS register displays the input power that is
being drawn. This register is the product of the READ_VIN
and READ_IIN values. When all the channels are powered
up, the input current is about 40mA. Since the input voltage is 5V, the input power is 5V•40mA or 200mW. You
can confirm this by clicking these three registers one by
one and view the telemetry window.
The MFR_EIN and MFR_EIN_TIME registers may be reset
by writing the MFR_EIN_CONFIG register.
You may also view the input current, input voltage, input
power, and input energy in numeric format. These appear
in the telemetry portion of the GUI. The MFR_EIN register
holds the accumulated energy value in milliJoules. There
is also a total time that the energy accumulator has been
active and is shown as the MFR_EIN_TIME register. The
GUI will automatically update the displayed multiplier as
the units go from mJ to J to kJ.
The DC2022A board provides power to the LTC2975
manager via a 5V supply, whether power comes from the
USB ribbon cable or from the 6V to 14V power jack. See
Figure 10 for a simplified block diagram.
To demonstrate the meter readings and register values,
first select the MFR_EIN register to display the energy
in the telemetry window (GUI’s lower right). Turn off all
14
dc2022af
DEMO MANUAL DC2022A
Advanced Demo Board Operations
POWER JACK 6 – 14V 5V SWITCH REG (LTC3604) +5V 50mΩ POWER SWITCH (LTC4415) VDD5 +5V from USB +3.3V RUN SWITCH IIN_SNSM SM BUS IIN_SNSP VPWR LTC2975 4-­‐CH POWER SYSTEM MANAGER CONTROL DC/DC (LTC3405) LOAD DC/DC (LTC3405) LOAD DC/DC (LTC3405) LOAD DC/DC (LTC3405) LOAD Figure 10. DC2022A Simplified Block Diagram
dc2022af
15
DEMO MANUAL DC2022A
Setup Procedure for Multiboard Arrays
Up to eight DC2022A boards can be cascaded to control up
to 32 independent power supplies. The number of boards
is limited by an I/O expander chip that has three address
pins, allowing eight different combinations. This setup
demonstrates the coordinated fault responses and accurate
time base shared across multiple power system managers.
Procedure
1.Stack the boards side-by-side by plugging JP1 of one
board into JP2 of another DC2022A board.
2.Ensure different slave address settings for each of the
boards. The address of each DC2022A board is set by
the DIP switch JP1 on the backside of the board. The
setting must be unique for each board in the array.
3.Plug in the 12V VIN power into one of the boards as
shown in Figure 11. Only one 12V power source is allowed.
4.The USB-to-I 2 C/SMBus/PMBus Controller may
be plugged into any board. If no DC2022A boards
show up in the GUI, click the magnifying glass icon
to enumerate the I2C bus and find the addresses
of the parts. Go to step #2 to ensure that each board
has a unique DIP switch setting.
5.Since the individual CONTROL lines are connected
across the boards (CTRL is a common signal across
all boards in the array), make sure that all CONTROL
switches are set to the RUN position.
6.Re-launch LTpowerPlay. After launching, LTpowerPlay
will enumerate the entire board array and build a representative system tree and read all hardware settings
into the GUI.
ATTENTION: Once the GUI has launched, click the
RAM->NVM button in the toolbar to ensure that the slave
addresses are retained after a power off or reset. Otherwise
you may lose communication with the slaves after a power
cycle or reset event.
Figure 11. Array of Multiple DC2022A Demo Boards
16
dc2022af
DEMO MANUAL DC2022A
Setup Procedure for Multiboard Arrays
Ensuring Slave Addresses Do Not Conflict
There is a small DIP switch on the backside of the DC2022A.
It is used to set the slave address of an I/O expander which
allows the addition of multiple boards to a setup. The I/O
expander has a base address of 0x20. The DIP switch
settings set the offset. The three switches that may be
changed are labeled A0, A1, A2. Examples below set the
boards to address 0x20 and 0x27.
Figure 12. DIP Switch Set to All 0's
Figure 13. DIP Switch Set to All 1's
dc2022af
17
DEMO MANUAL DC2022A
DC2022A Details - Top
Table 1. DC2022A - Default Switch Configuration (Default Position Shown in Gray)
REFERENCE DESIGNATOR
SIGNAL NAME
USAGE
JP3 (Bottom)
A0, A1, A2
DIP Switch Used to Set the Address Offset
OPEN
S1
CONTROL
Switch Used to Enable/Disable the CONTROL0 Input Pin of LTC2975
RUN
18
DEFAULT
dc2022af
DEMO MANUAL DC2022A
DC2022A Details - Bottom
dc2022af
19
DEMO MANUAL DC2022A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
IC 4-CH POWER SYSTEM MANAGER 64QFN
Linear Technology: LTC2975CUP#PBF
Required Circuit Components
1
1
U4
Additional Demo Board Circuit Components
2
4
C1, C3, C33, C35
CAP CER 220pF 50V 10% X7R 0603
AVX: 06035A221KAT2A
3
8
C2, C4, C5, C6, C30, C31, C32, C34
CAP CER 2200pF 50V 20% X7R 0603
Murata: GRM188R71H222MA01D
4
14
C7, C8, C12, C16, C18, C21, C22,
C25, C26, C43, C44, C50, C54, C55
CAP CER 0.1µF 16V 10% X7R 0603
TDK Corp: C1608X7R1C104K
5
10
C9, C10, C15, C23, C24, C41, C42,
C45, C56, C57
CAP CER 22µF 10V 10% X5R 1210
Murata: GRM32ER61A226KE20L
6
2
C11, C48
CAP CER 10µF 25V 10% X7R 1206
Kemet: C1206C106K3RACTU
7
2
C13, C53
CAP CER 68pF 50V 5% NPO 0603
Yageo: CC0603JRNPO9BN680
8
7
C14, C19, C20, C27, C28, C29, C46
CAP CER 1µF 16V 10% X7R 0603
Murata: GRM188R71C105KA12D
9
1
C17
CAP CER 47pF 50V 5% NPO 0603
Yageo: CC0603JRNPO9BN470
10
10
C36, C37, C38, C39, C49, C58, C59,
C60, C61, C62
CAP CER 10000pF 25V 10% X7R 0603
Yageo: CC0603KRX7R8BB103
11
1
C40
CAP TANT 47µF 16V 20% 7343
Kemet: T520D476M016ATE035
12
2
C47, C51
CAP CER 4.7µF 16V 10% X5R 0603
TDK: C1608X5R1C475K
13
1
C52
CAP CER 4.7pF 50V NP0 0603
Murata: GRM1885C1H4R7CZ01D
14
1
D1
DUAL SCHOTTKY DIODE 30V CC SOT-323-3
STMicroelectronics: BAT30CWFILM
15
4
L1, L2, L4, L5
INDUCTOR SHLD POWER 4.7µH SMD
Abracon Corporation: ASPI-0315FS-4R7M-T2
Würth: 744029004 (Alternate)
16
1
L3
INDUCTOR POWER 2.2µH 2.85A SMD
Vishay: IHLP1616BZER2R2M11
17
2
LED1, LED2
LED RED HI BRT SS TYPE LO CUR SM
Panasonic: LNJ208R8ARA
18
5
LED3, P1, P2, P3, P4
LED GREEN HIGH BRIGHT ESS SMD
Panasonic: LNJ326W83RA
19
4
Q1, Q2, Q3, Q4
TRANS GP SS PNP 40V SOT323
ON Semiconductor: MMBT3906WT1G
20
5
Q5, Q6, Q7, Q8, Q9
MOSFET N-CH 30V 900MA SOT323-3
Diodes Inc.: DMG1012UW-7
Vishay/Siliconix: SI1304BDL-T1-E3 (alternate)
21
9
R1, R2, R25, R26, R29, R30, R43,
R52, R53
RES 100K OHM 1/10W 1% 0603 SMD
Vishay: CRCW0603100KFKEA
22
1
R3
RES 47.5K OHM 1/10W 1% 0603 SMD
Vishay: CRCW060375K5FKEA
23
1
R4
RES 32.4K OHM 1/10W 1% 0603 SMD
Vishay: CRCW060332K4FKEA
24
5
R5, R6, R10, R18, R19
RES 3.01K OHM 1/10W 1% 0603 SMD
Yageo: RC0603FR-073K01L
25
1
R7
RES CURRENT SENSE .050 OHM 1W 1%
Ohmite: MCS1632R050FER
26
8
R8, R12, R20, R23, R24, R37, R39,
R56
RES 10.0K OHM 1/10W 1% 0603 SMD
Vishay: CRCW060310K0FKEA
27
2
R9, R45
RES 73.2K OHM 1/10W 1% 0603 SMD
Yageo: RC0603FR-0773K2L
28
1
R11
RES 46.4K OHM 1/10W 1% 0603 SMD
NIC: NRC06F4642TRF
29
2
R13, R17
RES 249 OHM 1/10W 1% 0603 SMD
Yageo: RC0603FR-07249RL
30
1
R14
RES 1.00K OHM 1/10W 1% 0603 SMD
Yageo: RC0603FR-071KL
31
3
R15, R16, R38
RES ARRAY 10K OHM 4 RES 1206
Vishay/Dale: CRA06S08310K0JTA
32
1
R21
RES 115K OHM 1/10W 1% 0603 SMD
Vishay: CRCW0603115KFKEA
33
1
R22
RES 80.6K OHM 1/10W 1% 0603 SMD
Vishay: CRCW060380K6FKEA
34
4
R27, R28, R54, R55
RES 330 OHM 1/2W 1% 1210 SMD
Vishay Dale: CRCW1210330RFKEA
35
4
R31, R32, R50, R51
RES ARRAY 2.7K OHM 4 RES 1206
Vishay/Dale: CRA06S0832K70JTA
20
dc2022af
DEMO MANUAL DC2022A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
36
4
R33, R35, R47, R49
RES 100 OHM 1/10W 1% 0603 SMD
NIC: NRC06F1000TRF
37
1
R34
RES 340K OHM 1/10W 1% 0603 SMD
Vishay: CRCW0603340KFKEA
38
1
R36
RES 402K OHM 1/10W 1% 0603 SMD
Vishay: CRCW0603402KFKEA
39
1
R40
RES 2.15K OHM 1/10W 1% 0603 SMD
Vishay: CRCW06032K49FKEA
40
1
R41 (OPT)
RES 10.0K OHM 1/10W 1% 0603 SMD
Vishay: CRCW060310K0FKEA
41
2
R42, R44
RES 698 OHM 1/10W 1% 0603 SMD
Yageo: RC0603FR-07698RL
42
1
R46
RES 158K OHM 1/10W 1% 0603 SMD
Vishay: CRCW0603158KFKEA
43
1
R48
RES 210K OHM 1/10W 1% 0603 SMD
Vishay: CRCW0603210KFKEA
44
4
U1, U2, U7, U8
IC BUCK SYNC ADJ 0.3A SOT23-6
Linear Technology: LTC3405AES6#TRMPBF
45
1
U3
IC BUCK SYNC 2.5A 16QFN
Linear Technology: LTC3604IUD#PBF
46
1
U5
IC DUAL 4A DIODES 16-MSOP
Linear Technology: LTC4415IMSE#PBF
47
1
U6
IC 2WIRE BUS BUFFER 8MSOP
Linear Technology: LTC4313CMS8-2#PBF
48
1
U9
IC I/O EXPANDER I2C 8B 20QFN
Microchip: MCP23008-E/ML
49
1
U10
IC EEPROM 2KBIT 400KHZ SOT23-5
Microchip Technology: 24AA02T-I/OT
50
1
U11
IC VREF SERIES PREC TSOT-23-6
Linear Technology: LT6654BHS6-1.25#TRMPBF
51
1
U12
IC BUFFER DUAL NON-INV SC706
TI: SN74LVC2G34DCKR
Hardware: For Demo Board Only
52
1
J1
CONN PWR JACK 2.1X5.5MM HIGH CUR
CUI Inc: PJ-002AH
53
1
J2
CONN HEADER 12POS 2MM STR DL PCB
FCI: 98414-G06-12ULF
54
1
JP1
CONN RECEPT 2MM DUAL R/A 14POS
Sullins Connector Solutions: NPPN072FJFN-RC
55
1
JP2
CONN HEADER 14POS 2MM R/A GOLD
Molex Connector Corporation: 87760-1416
56
1
JP3
SWITCH DIP 4POS HALF PITCH SMD
C&K Components: TDA04H0SB1
57
4
MH1, MH2, MH3, MH4
SPACER STACKING #4 SCREW NYLON
Keystone: 8831
58
1
S1
SW SLIDE DPDT 6VDC 0.3A PCMNT
C&K Components: JS202011CQN
59
1
SW1
BLK SWITCH TACTILE SPST-NO 0.05A 12V
C&K Components: PTS635SL25SMTR LFS
60
1
SW2
RED SWITCH TACTILE SPST-NO 0.05A 12V
C&K Components: PTS635SK25SMTR LFS
61
14
TP1, TP2, TP3, TP4, TP5, TP6, TP7,
TP12, TP13, TP14, TP19, TP20,
TP21, TP22
TERM SOLDER TURRET .219" .078"L
MILL-MAX: 2501-2-00-80-00-00-07-0
dc2022af
21
GND
C25
100n
GND
C44
100n
1
GND
Q3
MMBT3906
GND
3
2
R35
100
R36
402k
GND
SW 3
4 VIN
RUN 1
GND 2
5 VFB
6 MODE
U7
LTC3405AES6
C39
10n
GND
C38
10n
C32
2.2n
GND
R32
2.7k, 4X
C30
2.2n
GND
GND
C42
22u/10V
1210
GND
L4
4.7uH
1
Q6
DMG1012UW-7
P3
GREEN
R18
3.01k
CRA06S
4x ARRAY
1. ALL RESISTORS ARE 1% 0603.
2. ALL CAPACITORS ARE 16V 0603.
3. THE INTERMEDIATE BUS IS VDD=5.0V
ISNSN_CH0
ISNSP_CH0
TEMP_CH0
VSNS_CH0
RUN_CH0
DACP_CH0
C23
22u/10V
1210
VDD
R30
100k
VDD
1
3 2
2
R21
115k
GND
R25
100k
GND
R28
330
1210
C33
220p
VOUT_CH0
CH0
1.5V
ISNSN_CH1
ISNSP_CH1
TEMP_CH1
VSNS_CH1
RUN_CH1
GND
DACP_CH1
C24
22u/10V
1210
VDD
C26
100n
R34
340k
1
GND
Q4
MMBT3906
GND
SW 3
GND
3
2
R33
100
RUN 1
GND 2
C34
2.2n
GND
C37
10n
GND
C36
10n
CRA06S
4x ARRAY
C31
2.2n
GND
R26
100k
B
GND
R22
80.6k
GND
R27
330
1210
SCALE = NONE
APP ENG.
PCB DES.
R31
2.7k, 4X
C41
22u/10V
1210
GND
Q5
DMG1012UW-7
P4
GREEN
R19
3.01k
GND
L5
4.7uH
1
CUSTOMER NOTICE
GND
C43
100n
4 VIN
5 VFB
6 MODE
U8
LTC3405AES6
R29
100k
VDD
LTC2975 CH1 POWER STAGE, VOUT=1.8V
1
3 2
2
LTC2975 CH0 POWER STAGE, VOUT=1.5V
1
C35
220p
1
GND
02-12-14
LTC CONFIDENTIAL
FOR CUSTOMER
USE ONLY
CH1
1.8V
MIKE P.
Q7
DMG1012UW-7
www.linear.com
SHORT
GND
R43
100k
SW2
SHORT
VDD
VOUT_CH1
PRODUCTION
3
22
2
-
DEMO MANUAL DC2022A
Schematic Diagram
dc2022af
C7
100n
GND
C55
100n
1
GND
Q1
MMBT3906
GND
3
2
R49
100
R48
210k
SW 3
4 VIN
GND
GND 2
5 VFB
RUN 1
U1
LTC3405AES6
6 MODE
C60
10n
GND
C61
10n
C2
2.2n
GND
R51
2.7k, 4X
C5
2.2n
GND
GND
C57
22u/10V
1210
GND
L1
4.7uH
1
Q9
DMG1012UW-7
P1
GREEN
R5
3.01k
CRA06S
4x ARRAY
1. ALL RESISTORS ARE 1% 0603.
2. ALL CAPACITORS ARE 16V 0603.
3. THE INTERMEDIATE BUS IS VDD=5.0V
ISNSN_CH2
ISNSP_CH2
TEMP_CH2
VSNS_CH2
RUN_CH2
GND
DACP_CH2
C9
22u/10V
1210
VDD
R53
100k
VDD
R1
100k
GND
R3
47.5k
GND
R55
330
1210
LTC2975 CH2 POWER STAGE, VOUT=2.5V
C1
220p
VOUT_CH2
CH2
2.5V
ISNSN_CH3
ISNSP_CH3
TEMP_CH3
VSNS_CH3
RUN_CH3
GND
DACP_CH3
C10
22u/10V
1210
VDD
C8
100n
1
GND
Q2
MMBT3906
GND
3
2
R47
100
R46
158k
GND
SW 3
GND 2
C4
2.2n
GND
C58
10n
GND
C59
10n
CRA06S
4x ARRAY
C6
2.2n
GND
R2
100k
B
GND
R4
32.4k
GND
R54
330
1210
SCALE = NONE
APP ENG.
PCB DES.
R50
2.7k, 4X
C56
22u/10V
1210
GND
Q8
DMG1012UW-7
P2
GREEN
R6
3.01k
GND
L2
4.7uH
1
CUSTOMER NOTICE
GND
C54
100n
4 VIN
5 VFB
RUN 1
U2
LTC3405AES6
6 MODE
R52
100k
VDD
LTC2975 CH3 POWER STAGE, VOUT=3.3V
1
3 2
2
1
3 2
2
-
1
C3
220p
MIKE P.
CH3
3.3V
www.linear.com
VOUT_CH3
PRODUCTION
LTC CONFIDENTIAL
FOR CUSTOMER
USE ONLY
02-12-14
DEMO MANUAL DC2022A
Schematic Diagram
23
dc2022af
C14
1u
GND
VDD
GND
SCL
SDA
ALERTB
FAULTB
CTRL
SHARE_CLK
RESETB
C18
100n
+3V3
VSNS_CH1
VSENSEP0
VSENSEM0
VOUT_EN0
VOUT_EN1
VOUT_EN2
VOUT_EN3
AUXFAULTB
DNC
VIN_SNS
VPWR
VDD33
VDD33
VDD25
VDD25
TSENSE0
TSENSE1
U4
LTC2975CUP
R15
10k, 4X
CRA06S
TEMP_CH0
TEMP_CH1
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DACP_CH1
DACP_CH0
DACP_CH2
DACP_CH3
VSNS_CH2
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
GND
1. ALL RESISTORS ARE 1% 0603.
2. ALL CAPACITORS ARE 16V 0603.
3. THE INTERMEDIATE BUS IS VDD=5.0V
R38
10k, 4X
CRA06S
GND
C21
100n
VSNS_CH0
VSNS_CH3
ISENSEM3
ISENSEP3
ISENSEM2
ISENSEP2
ISENSEM1
ISENSEP1
ISENSEM0
ISENSEP0
REFM
GND
REFP
GND
ASEL1
ASEL0
TSENSE3
CONTROL1
C62
10n
GND
GND
38
37
36
35
34
33
SW1
RESET
GND
TEMP_CH2
GND
TEMP_CH3
C52
4.7p
GND
GND GND
C53
68p
R45
73.2k
C11
10u/25V
1206
+12V
GND
ITH
FB
RT
SGND
GND GND
12
11
10
9
C40
47u/16V
7343
PAD
PAD
GND GND
ISNSN_CH3
48
ISNSP_CH3
47
ISNSN_CH2
46
ISNSP_CH2
45
ISNSN_CH1
44
ISNSP_CH1
43
ISNSN_CH0
42
ISNSP_CH0
41
40
C16
39
100n
GND
C51
4.7u
1
2
3
4
U3
LTC3604IUD
MODE/SYNC
PGOOD
SW
SW
NC
RUN_CH0
RUN_CH1
RUN_CH2
RUN_CH3
PAD
13
14
15
16
TRACK/SS
RUN
VIN
VIN
8
7 VON
6 INTVCC
5 BOOST
C49
10n
GND
GND
C17
47p
C13
68p
C15
22u/10V
1210
IBV_AUX
GND
EEVCC
DNC 5
VIN 4
2 GND
3 DNC
1 GND VOUT 6
U11
LT6654BMPS6-1.25
GND
R8
10k
R9
73.2k
CUSTOMER NOTICE
C12
100n
IHLP-1616BZ
L3
2.2uH
GND
C47
4.7u
GND
GND
R40
2.49k
SCALE = NONE
APP ENG.
PCB DES.
C46
1u
GND
R13
249
D1
BAT30CWFILM
GND
R12
10k
C20
1u
R11
46.4k
B
INTERMEDIATE +5V BUS AND DIODE-OR
2
IIN_SNSM
1
IIN_SNSP
GND
R14
1.0k
GND
1
OUT1
OUT1
STAT1
WARN1
WARN2
STAT2
OUT2
OUT2
GND
IN1
IN1
EN1
CLIM1
CLIM2
EN2
IN2
IN2
C19
1u
1
2
3
4
5
6
7
8
U5
LTC4415IMSE
IIN_SNSM
IIN_SNSP
C48
10u/25V
1206
VDD
LTC CONFIDENTIAL
FOR CUSTOMER
USE ONLY
LED3
GREEN
R10
3.01k
+5V
02-12-14
GND GND
MIKE P.
R7
0.050
1206
www.linear.com
16
15
14
13
12
11
10
9
PRODUCTION
EXP GND
LTC2975
4-CHANNEL POWER SYSTEM MANAGER
FEATURING ACCURATE ENERGY MEASUREMENT
3
VSENSEM1
VSENSEP1
VSENSEM2
VSENSEP2
GND
GND
VDAC3
VDAC2
IIN_SNSM/NC
IIN_SNSP/NC
VDAC1
VDAC0
GND/NC
VIN_SNS_CAP/NC
VSENSEM3
VSENSEP3
PWRGD
SHARE_CLK
GND
GND
GND
CONTROL2
CONTROL3
WDI/RESETB
FAULTB0
FAULTB1
TSENSE2
WP
SDA
SCL
ALERTB
CONTROL0
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
24
2
-
DEMO MANUAL DC2022A
Schematic Diagram
dc2022af
R37
10k
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
GND
GND
1
3
5
7
9
11
13
GND
GP2
15 GP6
14 GP5
13 GP4
12 GP3
11
R23
10k
SHORT
U9
MCP23008-E/ML
R41
OPT
+3V3
SCL_IN
SDA_IN
EESCL
EESDA
+12V
UNUSED2
FAULTB
ALERTB
SHARE_CLK
RESETB
UNUSED1
1. ALL RESISTORS ARE 1% 0603.
2. ALL CAPACITORS ARE 16V 0603.
3. THE INTERMEDIATE BUS IS VDD=5.0V
CONN_DC1613
+5V (100mA)
1
SDA
2
GND
3
SCL
4
+3.3V(100mA) 5
ALERT
6
GPO_1
7
OUTEN
8
GPO_2
9
GND
10
AUXSCL
11
AUXSDA
12
J2
R39
10k
+3V3
GND
2
4
6
8
10
12
14
TP6
CTRL_P
TP5
SHARE_CLK
TP1
TP2
TP20
SCL_IN
SDA_IN
CTRL
GP1
GND
GND
GND
TP13
SCL
10
GND
1
2
3
4
GND
8
7
6
5
A2
A1
A0
RST\
NC
1
2
3
4
5
U6
ENABLE VCC
SCLO SDAO
SDAI
SCLI
GND READY
GND
1
3
5
7
9
11
13
JP2
MALE
GND
C29
1u
R17
249
+3V3
GND
LTC4313CMS8
GP0
16 GP7
PAD PAD
17 VSS
8
NC
18 VDD
9
TP7
FAULTB
TP19
SDA
TP12
ALERTB
7
INT
19 SCL
6
NC
20 SDA
JP1
FEMALE
R56
10k
C22
100n
2
4
6
8
10
12
14
+3V3
GND
1
ON
2
3
4
8
7
6
5
GND
1
2
3
4
JP3
TDA04H0SK1
R16
10k, 4X
GND
C28
1u
S1
3
1
6
4
CONTROL
GND
SDA
SCL
OFF S1
2
5
RUN
3
2
1
GND
GND
C27
1u
GND GND
C45
22u/10V
1210
CUSTOMER NOTICE
VCC 4
U10
24AA02T-I/OT
3 SDA
2 GND
WP 5
EEVCC
1 SCL
R20
10k
6-14V
POWER INPUT
R24
10k
GND
+12V
SCALE = NONE
APP ENG.
PCB DES.
1
3 2A
2 GND
1 1A
B
2Y 4
VCC 5
1Y 6
U12
SN74LVC2G34DCK
GND
FAULTB
ALERTB
-
2
2
LED1
RED
1
1
LED2
RED
R44
698
R42
698
MIKE P.
GND
C50
100n
www.linear.com
+3V3
PRODUCTION
LTC CONFIDENTIAL
FOR CUSTOMER
USE ONLY
02-12-14
DEMO MANUAL DC2022A
Schematic Diagram
dc2022af
25
DEMO MANUAL DC2022A
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
26 Linear Technology Corporation
dc2022af
LT 0714 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2014
Similar pages