DC1962C - Demo Manual

DEMO MANUAL DC1962C
14-Channel Power Supply
System Employing LTC3880/LTC2974/LTC2977
Power System Managers with EEPROM
Description
The DC1962C is a demonstration system that showcases three
different Linear Technology devices—the LTC®3880, LTC2974,
and LTC2977. The LTC2974 and LTC2977 devices are I2C/
SMBus/PMBus power system managers with EEPROM. The
LTC3880 is a dual output PolyPhase® step-down DC/DC controller with digital power system management. The LTC3880 monitors and controls 2 power supply rails, the LTC2974 monitors
and controls 4 power supply rails, and the LTC2977 monitors
and controls 8 power supply rails. The DC1962C demonstrates
the ability of these devices to sequence, trim, margin, supervise,
monitor, and log faults for fourteen power supplies. Each power
supply channel’s output voltage is monitored and each device
monitors its own internal die temperature. Six channels have
current and external temperature sensing.
The DC1962C is a single circuit board that contains fourteen
independent power supply rails. The board employs twelve
LTC3405A 300mA switch-mode regulators, which are configured to be controlled by the LTC2974 (4) and LTC2977 (8). The
LTC3880’s two channels have much of the switching regulator
integrated, only requiring the external power stage (power
MOSFETs), inductor, and other passives. This board provides
a sophisticated fourteen channel digitally programmable power
supply system. The rail voltages are programmable within the
trim range shown in Table 1.
This demonstration system is supported by the LTpowerPlay™
graphical user interface (GUI) enabling complete control of the
features on all three devices. Together, the LTpowerPlay software
and DC1962C hardware system create a powerful development
environment for designing and testing configuration settings
of the LTC3880, LTC2974, and LTC2977. These settings can
be stored in each of the devices’ 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 three digital power ICs. Telemetry allows easy
access and decoding of the fault log created by each device.
The board comes pre-programmed with the EEPROM values
appropriate for the fourteen power supply rails on the DC1962C.
Just plug and play!
Multiple DC1962C boards can be cascaded together to form a
high channel count power supply (see the Multi-Board Arrays
section). This allows for the formation of a single, coherent
power supply system. The user configures up to eight DC1962C
boards, thereby controlling up to 112 separate power supply
rails. This cascaded configuration demonstrates features of the
LT power system management ICs which enable timing and
fault information to be shared across multiple ICs.
The DC1962C 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-to-I2C/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)
• LTpowerPlay Software
DC1962C Features
I2C/SMBus Serial Interface
PMBus Compliant Command Set
Configuration EEPROM with CRC
Black Box Fault Logging to Internal EEPROM
Differential Input, 16-Bit Δ∑ ADC with less than ±0.25% of
Total Unadjusted Error (±0.5% for LTC3880)
• Voltage Servos Precisely Adjust Supply Voltages
• LTC2974 and LTC2977 Utilize 10-Bit trim DACs with
Soft-Connect
• Telemetry Reads Back VIN, IIN, VOUT, IOUT, Temperature (Int.
and Ext.)
• Output Sequencer - Time Based or Tracking (Tracking support
on LTC2974 Only)
• Supports Multichannel Fault Management
• Operates Autonomously without Additional SW
• Powered from 6V to 14V
• Packaging:
– LTC2974/LTC2977 in 64-lead QFN
•
•
•
•
•
– LTC3880 in 40-lead QFN
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology, the Linear logo and PolyPhase are registered trademarks
and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
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DEMO MANUAL DC1962C
Performance Summary
Specifications are at TA = 25°C
POWER SUPPLY CHANNEL
CH(0:1)
CH(2:5)
CH(6:13)
Manager/Controller
LTC3880
LTC2974
LTC2977
0.85V, 1.1V
(Defined by Config)
1.5V, 1.8V, 2.0V, 2.2V
0.9V, 1.0V, 1.1V, 1.2V,
2.5V, 2.7V, 3.0V, 3.3V
Nominal Untrimmed Output Voltages
Rated Output Current
0.3A
Default Margin Range
± 5%
Output Trim Range (VFS_VDAC = 1.38V)
Temperature
Each Channel Is Adjustable
from 0.5V to 4.5V (Note 1)
15%/–11%
15%/–11%
1 Internal, 2 Ext.
1 Internal, 4 Ext.
1 Internal
Common Characteristics. Specifications Valid Over Full Operating Temperature Range
VALUE
PARAMETER
CONDITIONS
VPWR Supply Input Voltage Range
ADC Total Unadjusted Error
ADC Voltage Sensing Input Range
MIN
TYP
6
MAX
UNITS
14
V
VIN_ADC ≥ 1V, Applies to LTC2974/LTC2977
±0.25
%
VIN_ADC ≥ 1V, Applies to LTC3880
±0.5
%
6
V
Differential Voltage: VIN_ADC = (VSENSEPn – VSENSEMn)
0
Note 1: Note that VOUT_MAX limit is set to 2.5V by default. VOUT_MAX clamps the voltage setpoint to 2.5V. It is recommended that you change the VOUT_MAX
register and associated VOUT FAULT limit registers when changing VOUT to prevent the channel from faulting off.
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
NVM – Non-volatile memory, see EEPROM.
Monitor – The act of measuring voltage, current, and temperature readings.
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.
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DEMO MANUAL DC1962C
LTpowerPlay GUI Software
LTpowerPlay is a powerful Windows-based development environment that supports Linear Technology power system
management ICs with EEPROM, including the LTC2974 and LTC2977 4-channel and 8-channel PMBus power system
managers, and the LTC3880 dual output PolyPhase step-down DC/DC controller with digital power system management. 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 management 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 DC1962C 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
Figure 1. Screenshot of the LTpowerPlay GUI
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DEMO MANUAL DC1962C
Quick Start Procedure
To access technical support documents for LTC Digital Power Products visit “Help, View Online help” on the LTpowerPlay menu.
The following are examples of content available in the online help:
1.Demonstration and Tutorial Videos
• An updated Quick Start Demonstration video of LTpowerPlay and this demo board
• Product/Feature-specific demonstration and tutorial videos
2.Detailed Technical Documentation
• Schematic Checklists
• Device Programming Options
• Firmware ‘Getting Started’ guides with sample code (margining, reading telemetry, etc.)
The following procedure describes how to set up a DC1962C demo system.
1.Download and install the LTpowerPlay GUI: www.linear.com/ltpowerplay
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 DC1962C board using the 12-pin ribbon cable.
Figure 2. Connecting DC1962C Board and the DC1613 I2C/SMBus/PMBus Controller
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DEMO MANUAL DC1962C
Quick Start Procedure
3.Confirm that the CONTROL switch is set to the RUN
position.
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.
b.A green message box will be displayed momentarily
in the lower left hand corner confirming that the
DC1962C is communicating.
5.Connect a 12VDC power supply with > 0.5A capacity to
the VIN input jack of any DC1962C, if multiple boards
are being powered.
6.Launch the LTpowerPlay GUI.
a. The GUI automatically identifies the DC1962C and
builds a system tree for each power system manager.
The system tree on the left hand side will look as
below:
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.
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 NVM” icon in the toolbar.
7.The CONTROL switch is configured to control all 14
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.
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DEMO MANUAL DC1962C
Quick Start Procedure
Loading a DC1962C 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, then click on the “PC → RAM”
into the working RAM of the devices.
icon. This loads the configuration
3.To store the configuration to NVM (EEPROM), click on the “RAM → NVM” icon as shown below.
DC1962C Details - Top Side
Figure 3. DC1962C Top Side Details
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DEMO MANUAL DC1962C
Common Demo Board Operations
Margin All Rails
The digital power products on the DC1962C not only
monitor each of their respective 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 dialog, click the GroupOp icon in the toolbar.
The buttons labeled “ignore faults” will margin
without creating a fault even if the fault limits are exceeded
(LTC2974 and LTC2977 only).
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 set points to
margin high, margin low, and back to nominal voltages.
Each of the power management ICs 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 multichannel 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. See corresponding data sheet.
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DEMO MANUAL DC1962C
Common Demo Board Operations
Creating a Fault
Clearing a Fault
There is a pushbutton on the DC1962C 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 on channel 2,
the 1.5V output (GUI channel U1:0). 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.
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
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.
Reset the DC1962C
A reset pushbutton is provided on the board. To reset all
devices on the DC1962C board and reload the EEPROM
contents into operating memory (RAM), press RESET
(SW2) on the DC1962C. Note that the “RESET” icon in
the GUI tool bar issues a software reset for any LTC3880
device in the system. It is recommended that you use the
reset pushbutton on the board to provide a reset condition
to the entire system.
DC1962C LEDs
Each individual channel on DC1962C also has its own
green power good LED (RUN_CH0 through RUN_CH13).
When USB power (DC1613 Controller) or external power
(6V to 14V jack) is applied, the +5V green LED will illuminate, indicating that the power system managers are
powered. The red LEDs will illuminate when an alert or a
fault has occurred.
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DEMO MANUAL DC1962C
Common Demo Board Operations
Sequencing Output Channels
The LTC3880, LTC2974, and LTC2977 have been preconfigured with different TON_DELAY values for each
channel. The TON_DELAY parameter is applied to each
device relative to the respective CONTROL pin (RUN on
the LTC3880). On this demo board, all CONTROL/RUN
pins are wire OR’d. Therefore the TON and TOFF delays
are enforced relative to one edge. Figure 4 shows an oscilloscope screen capture of four output rails sequencing up.
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. 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 14 channels. Figures 5 and 6
show TON and TOFF delays for all channels at once. You
will notice in Figure 1 that the GUI shows idealized on/off
waveforms. This graphical view shows the relative TON and
TOFF delays in response to an on/off command, whether
it comes from the CONTROL switch or PMBus command.
Once a new timing value is entered, the timing change will
be reflected in the idealized waveforms.
Figure 4. Sequencing Output Channels with DC1962C Using TON_DELAY
Figure 5. TON_DELAY Configuration
Figure 6. TOFF_DELAY Configuration
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DEMO MANUAL DC1962C
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 each of the
digital power managers on the DC1962C demo board.
Create a Fault and Fault Log
To create a fault log, you must create a fault, as described
in the Creating a Fault on page 8. Select the appropriate
device in the system tree by clicking on the U1 LTC2974
chip. We will proceed to work with the LTC2974 fault log.
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DEMO MANUAL DC1962C
Advanced Demo Board Operations
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 one of the devices. Clicking the icon
will bring up a dialog box. Note that it is context sensitive.
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.
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 has been powered
up or time since the previous reset.
In this case, the fault log will show that channel U1:0
faulted due to a VOUT_UV_FAULT condition. On the previous telemetry loop, the channel voltage reading was a
nominal value (1.5V).
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.
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DEMO MANUAL DC1962C
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 LTC2974 in the
system tree. Go to Utilities > Fault Sharing Diagram. For
more details on this topic, please refer to the MFR_FAULTB
propagate and response sections in the data sheet.
The LTC2974 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 an LTC3880 or
LTC2977 channel will shut down all LTC2974 channels,
and a fault on any LTC2974 channel will propagate to all
channels on the DC1962C demo board since the fault pins
are tied together.
NOTE: All FAULT pins on all power managers are tied together on the DC1962C 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 DC1962C, this hardware
configuration allows one to program each device’s fault
settings on a channel-by-channel basis. By default, the
LTC2974 is configured to shut down its channels if
other devices fault and to propagate its own fault via the
FAULT pins. The LTC2977 is configured the same as the
LTC2974, however zone 1 (U2:4-U2:7) is configured to not
propagate a fault. 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
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DEMO MANUAL DC1962C
Advanced Demo Board Operations
Fault Configuration Example
Let’s explore two different examples. Suppose we do not
want channel U1:0 (CH2 1.5V rail) to propagate its fault
to the other channels when U1:0 faults. And suppose we
do not want channel U1:1 (CH3 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 DC1962C.
We can now create a fault on U1:0 (CH2) by shorting the
output to ground. Press the CREATE FAULT button on
the board. 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 U1:0 (CH2) will power back up. We can
now observe the effect of changing the response setting on
U1:1 (CH3). If you short U1:2 (CH4 2.0V rail) to ground,
notice that all rails shut down except U1:1 (CH3). This is
an example of a keep-alive channel that remains powered
up independent of faults to other channels.
Figure 9. Updated Fault Sharing Configuration
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DEMO MANUAL DC1962C
Advanced Demo Board Operations
The two LTC3880 channels can be uniquely configured
and any fault can be propagated or not. Since the LTC3880
GPIO pins are tied together, a fault on CH0 may be used to
turn off CH1. This is achieved by setting the appropriate
MFR_GPIO_PROPAGATE command code and the MFR_
GPIO_RESPONSE command to “inhibit.”
Setup Procedure for Multiboard Arrays
Up to eight DC1962C boards can be cascaded to control
up to 112 independent power supplies. The number of
boards is limited by an I/O expander chip that has three
address pins, allowing 8 different combinations. This
setup demonstrates the coordinated fault responses and
accurate time base shared across multiple power system
managers.
Procedure:
2.Ensure different slave address settings for each of the
boards. The address of each DC1962C board is determined by pins A2, A1 and A0 of 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 10. Only one +12V power source is
allowed.
1.Stack the boards side-by-side by plugging JP1 of one
board into JP2 of another DC1962C board.
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DEMO MANUAL DC1962C
Setup Procedure for Multiboard Arrays
4.The USB-to-I2C/SMBus/PMBus Controller may be
plugged into any board. If no DC1962C 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 tool bar 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 10. Array of Multiple DC1962C Demo Boards
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DEMO MANUAL DC1962C
Setup Procedure for Multiboard Arrays
Ensuring Slave Addresses Do Not Conflict
There is a small DIP switch on the backside of the DC1962C.
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 11. DIP Switch Set to All 0's
Figure 12. DIP Switch Set to All 1's
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DEMO MANUAL DC1962C
DC1962C Details - Top
Table 3. DC1962C - Default Switch Configuration (Default Position Shown in Grey in the Figure Above)
REFERENCE DESIGNATOR
SIGNAL NAME
USAGE
DEFAULT
JP3
A0, A1, A2
DIP switch used to set the address offset
OPEN
S1
CONTROL0
Switch used to enable/disable the CONTROL0 input pin of
LTC3880, LTC2974, and LTC2977
RUN
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DEMO MANUAL DC1962C
DC1962C Details - Bottom
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DEMO MANUAL DC1962C
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
1
U8
IC DUAL PolyPhase CONTROLLER 40-QFN
Linear Technology: LTC3880EUJ-1
2
1
U9
IC 8-CH PWR SYSTEM MANAGER 64-QFN
Linear Technology: LTC2977CUP
3
1
U10
IC 4-CH PWR SYSTEM MANAGER 64-QFN
Linear Technology: LTC2974CUP
Additional Demo Board Circuit Components
4
12
C1, C3, C5, C7, C64, C65, C66, C67, C68,
C69, C70, C71
CAP CER 220pF 50V 10% NPO 0603
NIC: NMC0603NPO221J50TRPF
5
8
C2, C4, C6, C8, C9, C10, C11, C12
CAP CER 2200pF 50V 20% X7R 0603
Murata: GRM188R71H222MA01D
6
30
C13, C14, C15, C16, C25, C26, C31, C43, C44, CAP CER 0.1µF 16V 10% X7R 0603
C46, C47, C49, C50, C51, C52, C81, C82, C83,
C84, C85, C86, C87, C88, C92, C96, C97, C98,
C99, C115, C117
NIC: NMC0603X7R104K16TRPF
7
11
C17, C18, C106, C107, C108, C109, C110,
C111, C112, C113, C118
TDK: C1608X7R1H103K
8
16
C19, C20, C21, C22, C23, C24, C32, C53, C54, CAP CER 10µF 10V 10% X5R 1210
C55, C56, C57, C58, C59, C60, C72
Kemet: C1210C106K8PACTU
9
3
C27, C90, C93
CAP CER 4.7µF 16V 10% X5R 0603
TDK: C1608X5R1C475K
10
1
C28
CAP CER 10µF 25V 20% X5R 1210
Taiyo Yuden: TMK325BJ106MM-T
11
2
C29, C34
CAP CER 3300pF 50V 10% X7R 0603
Murata: GRM188R71H332KA01D
12
13
C30, C36, C39, C41, C42, C45, C48, C61, C62, CAP CER 1µF 16V 10% X7R 0603
C63, C89, C114, C116
Taiyo Yuden: EMK107B7105KA-T
13
2
C33, C37
CAP CER 100pF 50V 10% X7R 0603
AVX: 06035C101KAT2A
14
2
C35, C95
CAP CER 68pF 50V 5% NPO 0603
AVX: 06035A680JAT2A
15
13
C38, C73, C74, C75, C76, C77, C78, C79, C80, CAP CER 22µF 10V 10% X5R 1210
C102, C103, C104, C105
Kemet: C1210C226K8PACTU
16
1
C40
AVX: 06035A470JAT2A
CAP CER 10000pF 50V 10% X7R 0603
CAP CER 47pF 50V 5% NPO 0603
17
1
C91
CAP TANT 47µF 16V 20% 7343
Kemet: T520D476M016ATE035
18
1
C94
CAP CER 4.7pF 50V NPO 0603
Murata: GRM1885C1H4R7CZ01D
19
2
C100, C101
CAP CER 47µF 10V 20% X7R 1210
Murata: GRM32ER71A476ME15L
20
4
D1, D2, D3, D4
DIODE SCHOTTKY 20V 1A SOD323
NXP Semiconductors:
PMEG2010EA,115
21
1
D5
DUAL SCHOTTKY DIODE 30V CC SOT-323-3
STMicroelectronics: BAT30CWFILM
22
2
L1, L2
INDUCTOR SHLD POWER 10.0µH SMD
Abracon Corporation:
ASPI-0315FS-100M-T2
23
12
L3, L4, L5, L6, L8, L9, L10, L11, L12, L13,
L14, L15
INDUCTOR SHLD POWER 4.7µH SMD
Abracon Corporation:
ASPI-0315FS-4R7M-T2
24
1
L7
INDUCTOR POWER 2.2µH 2.85A SMD
Vishay: IHLP1616BZER2R2M01
25
15
P1, P2, P3, P4, P5, P6, P9, P10, P11, P12,
P13, P14, P15, P16, P17
LED GREEN HIGH BRIGHT ESS SMD
Panasonic: LNJ337W83RA
26
2
P7, P8
LED RED HI BRT SS TYPE LO CUR SM
Panasonic: LNJ208R8ARA
27
2
Q1, Q2
MOSFET N-CH DUAL 20V SSOT-6
Fairchild Semiconductor: FDC6401N
28
1
Q10
MOSFET P-CH 8V 860MA SOT323-3
Vishay/Siliconix: SI1305DL-T1-E3
29
6
Q3, Q4, Q5, Q6, Q7, Q8
TRANS GP SS PNP 40V SOT323
ON Semiconductor: MMBT3906WT1G
30
14
Q9, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18, MOSFET N-CH 30V 900MA SOT323-3
Q19, Q20, Q21, Q22, Q23
Vishay/Siliconix: SI1308EDL-T1-GE3
dc1962cf
19
DEMO MANUAL DC1962C
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
31
21
R1, R2, R3, R4, R29, R60, R61, R62, R63,
R76, R77, R78, R79, R80, R81, R82, R83,
R118, R119, R120, R121
RES 100k 1/10W 1% 0603 SMD
Vishay: CRCW0603100KFKEA
RES 1.50k 1/10W 1% 0603 SMD
32
4
R5, R6, R7, R8
33
15
R9, R10, R15, R16, R17, R18, R38, R41, R42, RES 3.01k 1/10W 1% 0603 SMD
R43, R44, R45, R46, R47, R48
Yageo: RC0603FR-073K01L
Yageo: RC0603FR-071K5L
34
1
R11
RES 115k 1/10W 1% 0603 SMD
Vishay: CRCW0603115KFKEA
35
1
R12
RES 80.6k 1/10W 1% 0603 SMD
Vishay: CRCW060380K6FKEA
36
1
R13
RES 66.5k 1/10W 1% 0603 SMD
Vishay: CRCW060366K5FKEA
37
1
R14
RES 57.6k 1/10W 1% 0603 SMD
Vishay: CRCW060357K6FKEA
38
9
R19, R24, R33, R49, R58, R59, R100, R101,
R130
RES 10.0k 1/10W 1% 0603 SMD
Vishay: CRCW060310K0FKEA
39
4
R20, R21, R112, R113
RES 4.7Ω 1% 0603 SMD
Vishay: CRCW06034R70FKEA
40
2
R22, R23
RES 13.3k 1/10W 1% 0603 SMD
NIC: NRC06F1332TRF
41
4
R25, R26, R122, R123
RES 698Ω 1/10W 1% 0603 SMD
Vishay: CRCW0603698RFKEA
42
3
R27, R56, R103
RES 73.2k 1/10W 1% 0603 SMD
Vishay: CRCW060373K2FKEA
43
3
R28, R31, R39
RES ARRAY 10k 4 RES 1206
Vishay/Dale: CRA06S08310K0JTA
44
1
R30
RES 46.4k 1/10W 1% 0603 SMD
NIC: NRC06F4642TRF
45
0
R32 (OPT)
RES 10.0k 1/10W 1% 0603 SMD
N/A
46
2
R34, R40
RES 249Ω 1/10W 1% 0603 SMD
NIC: NRC06F2490TRF
47
1
R35
RES 1.00k 1/10W 1% 0603 SMD
Yageo: RC0603FR-071KL
48
0
R36, R37 (OPT)
RES 0603 OPTION
N/A
49
1
R50
RES 806k 1/10W 1% 0603 SMD
Vishay: CRCW0603806KFKEA
50
2
R51, R89
RES 402k 1/10W 1% 0603 SMD
Vishay: CRCW0603402KFKEA
51
2
R52, R106
RES 267k 1/10W 1% 0603 SMD
Vishay: CRCW0603267KFKEA
52
5
R53, R64, R65, R66, R67
RES 200k 1/10W 1% 0603 SMD
Vishay: CRCW0603200KJNEA
53
1
R54
RES 93.1k 1/10W 1% 0603 SMD
Vishay: CRCW060393K1FKEA
54
1
R55
RES 84.5k 1/10W 1% 0603 SMD
Vishay: CRCW060384K5FKEA
55
1
R57
RES 63.4k 1/10W 1% 0603 SMD
Vishay: CRCW060363K4FKEA
56
14
R68, R69, R70, R71, R72, R73, R74, R75,
R124, R125, R126, R127, R128, R129
RES 470Ω 1/4W 5% 1210 SMD
Rohm Semiconductor:
MCR25JZHJ471
57
12
R84, R86, R88, R90, R92, R94, R96, R98,
R105, R107, R109, R111
RES 100Ω 1/10W 1% 0603 SMD
Vishay: CRCW0603100RFKEA
58
1
R85
RES 316k 1/10W 1% 0603 SMD
Vishay: CRCW0603316KFKEA
59
2
R87, R110
RES 348k 1/10W 1% 0603 SMD
Vishay: CRCW0603348KFKEA
60
1
R91
RES 422k 1/10W 1% 0603 SMD
Vishay CRCW0603422KFKEA
61
1
R93
RES 442k 1/10W 1% 0603 SMD
Vishay: CRCW0603442KFKEA
62
1
R95
RES 475k 1/10W 1% 0603 SMD
Vishay: CRCW0603475KFKEA
63
1
R97
RES 523k 1/10W 1% 0603 SMD
Yageo: RC0603FR-07523KL
64
1
R99
RES 590k 1/10W 1% 0603 SMD
Vishay: CRCW0603590KFKEA
65
1
R102
RES 2.49k 1/10W 1% 0603 SMD
Yageo: RC0603FR-072K49L
66
1
R104
RES 237k 1/10W 1% 0603 SMD
Vishay: CRCW0603237KFKEA
67
1
R108
RES 294k 1/10W 1% 0603 SMD
Vishay: CRCW0603294KFKEA
20
dc1962cf
DEMO MANUAL DC1962C
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
68
4
R114, R115, R116, R117
RES ARRAY 2.7k 4 RES 1206
Vishay/Dale: RA06S0832K70JTA
69
12
U1, U2, U3, U4, U12, U13, U14, U15, U16,
U17, U18, U19
IC BUCK SYNC ADJ 0.3A SOT23-6
Linear Technology:
LTC3405AES6#TRMPBF
70
1
U5
IC BUCK SYNC 2.5A 16QFN
Linear Technology: LTC3604IUD#PBF
71
1
U6
IC COMP DUAL 400MV REF TSOT23-6
Linear Technology:
LT6700CS6-2#TRPBF
72
1
U7
IC DUAL 4A DIODES 16-MSOP
Linear Technology:
LTC4415IMSE#PBF
73
1
U11
IC 2-WIRE BUS BUFFER 8MSOP
Linear Technology:
LTC4313CMS8-2#PBF
74
1
U20
IC I/O EXPANDER I2C 8B 20QFN
Microchip: MCP23008-E/ML
75
1
U21
IC EEPROM 2KBIT 400kHz SOT23-5
Microchip Technology: 24AA02T-I/OT
76
1
U22
IC VREF SERIES PREC TSOT-23-6
Linear Technology: LT6654BMPS61.25#TRMPBF
77
1
U23
IC BUFFER DUAL NON-INV SC706
TI: SN74LVC2G34DCKR
Hardware - For Demo Board Only
78
1
J1
CONN PWR JACK 2.1X5.5MM HIGH CUR
CUI Inc: PJ-002AH
79
1
J2
CONN HEADER 12POS 2MM STR DL PCB
FCI: 98414-G06-12ULF
80
1
JP1
CONN RECEPT 2MM DUAL R/A 14POS
Sullins Connector Solutions:
NPPN072FJFN-RC
81
1
JP2
CONN HEADER 14POS 2MM R/A GOLD
Molex Connector Corporation:
87760-1416
82
1
JP3
SWITCH DIP 4POS HALF PITCH SMD
C&K Components: TDA04H0SB1
83
4
MH1, MH2, MH3, MH4
SPACER STACKING #4 SCREW NYLON
Keystone: 8831
84
1
S1
SW SLIDE DPDT 6VDC 0.3A PCMNT
C&K Components: JS202011CQN
85
1
SW1
SWITCH TACTILE RED SPST-NO 0.05A 12V
C&K Components:
PTS635SK25SMTR LFS
86
1
SW2
SWITCH TACTILE BLK SPST-NO 0.05A 12V
C&K Components:
PTS635SL25SMTR LFS
87
26
TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TERM SOLDER TURRET 0.219" 0.078"L
TP10, TP11, TP12, TP13, TP14, TP15, TP16,
TP18, TP19, TP20, TP21, TP22, TP23, TP24,
TP25, TP26, TP27
MILL-MAX: 2501-2-00-80-00-00-07-0
88
1
TP17
MILL-MAX: 2308-2-00-80-00-00-07-0
TERMINAL PIN TURRET 0.109" SOLDER
dc1962cf
21
DEMO MANUAL DC1962C
Schematic Diagram
22
dc1962cf
DEMO MANUAL DC1962C
Schematic Diagram
dc1962cf
23
DEMO MANUAL DC1962C
Schematic Diagram
24
dc1962cf
DEMO MANUAL DC1962C
Schematic Diagram
dc1962cf
25
DEMO MANUAL DC1962C
Schematic Diagram
26
dc1962cf
DEMO MANUAL DC1962C
Schematic Diagram
dc1962cf
27
DEMO MANUAL DC1962C
Schematic Diagram
28
dc1962cf
DEMO MANUAL DC1962C
Schematic Diagram
dc1962cf
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.
29
DEMO MANUAL DC1962C
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
30 Linear Technology Corporation
dc1962cf
LT 0413 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
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