LINER LTC4282 High current hot swap controller with i2c compatible monitoring Datasheet

DEMO MANUAL DC2024A
LTC4282
High Current Hot Swap Controller
with I2C Compatible Monitoring
Description
Demonstration circuit 2024A features the LTC®4282 high
current Hot Swap controller. The LTC4282 is well suited
to high power applications because the precise monitoring capability and accurate current limiting reduces the
extremes in which both loads and power supplies must
safely operate. Non-volatile configuration allows for flexibility in the autonomous generation of alerts and response
to faults. The LTC4282 provides a rich set of features to
support Hot Swap applications including:
nn
nn
nn
12-/16-Bit ADC Monitors Current, Voltage, Power and
Energy
Controls Two Sets of Parallel MOSFETs for High Current
Applications
nn
Non-Volatile Configuration and Logging Functions
nn
Generates Alerts on ADC Measurements Outside Limits
nn
Software Adjustable Current Limit with Foldback
nn
Three General Purpose Input/Outputs
Available in a 32-pin 5mm × 5mm QFN package, the
LTC4282 is showcased on DC2024A configured for a
12V/100A application. The DC2024A-B has an included
programming socket to allow programming an LTC4282
for prototyping purposes prior to its permanent installation
on a PCB. The DC2024A-A does not have this socket. By
changing a few passive components, 2.9V to 30V applications can easily be evaluated.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2024A
I2C/SMBus Interface
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.
A
Variable Power Supply V V Test Loads Figure 1. Proper Measurement Equipment Setup
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DEMO MANUAL DC2024A
Performance Summary
PARAMETER
Specifications are at TA = 25°C
CONDITIONS
VALUE
Input Supply Voltage Range
2.9V to 30V
Nominal Operating Voltage
12.0V
Overvoltage Lockout
Nominal
15.0V
Undervoltage Lockout
Nominal
11.1V
Output Current Limit
Nominal
100A
Maximum Load Capacitance
Nominal
10,000µF
Timer Expiration Period
Nominal
4ms
Quick Start Procedure
Table. Power Input and Output Connections
NOMENCLATURE
CONNECTOR
DESCRIPTION
12VIN
E1
12V Power In
12VOUT 100A
E2
12V Power Out
GND
E21 (Banana)
Power Supply Common
NOMENCLATURE
TURRET
DESCRIPTION
GPIO1
E3
GPIO1 Pin I/O
Table 2. Test Points, Turrets
VCC
E4
Internal VCC
12VOUT
E5
12VOUT Monitor
12VIN
E6
12VIN Monitor
ON (SHORT PIN)
E7
ON Pin Monitor/Input
SCL
E8
I2C Serial Clock Input
GND
E9, E10, E15, E17
Ground
SDA
E11
I2C Serial Data Input/Output
ALERT
E12
ALERT Pin
GPIO2
E13
GPIO2 Pin I/O
GPIO3
E14
GPIO3 Pin I/O
EXT 5V
E16
TIMER
E18
TIMER Pin
UV
E19
UV Pin
OV
E20
OV Pin
GATE2
E22
GATE 2 Pin
GATE1
E23
GATE 1 Pin
NOMENCLATURE
LED
DESCRIPTION
IN
D1 (Green)
Input Power Indicator
OUT
D2 (Green)
Output Power Indicator
GPIO1
D3 (Green)
GPIO1 Logic Low Indicator
Table 3. LED Indicators
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DEMO MANUAL DC2024A
Quick Start Procedure
Table 3. LED Indicators
SOCKET POWER ON
D4 (Red)
Programming Socket SKT1 Powered
ALERT
D5 (Red)
ALERT Pin Logic Low
SCL
D6 (Green)
Serial Clock Active
SDA
D7 (Green)
Serial Data Active
GPIO3
D8 (Green)
GPIO3 Logic Low
GPIO2
D9 (Green)
GPIO2 Logic Low
JUMPER
DESCRIPTION
Table 4. Jumpers
NOMENCLATURE
CLK: INT, EXT
JP1
Internal/External Clock Select
ON: INTVCC, FLOAT, GND
JP2
ON Input Select, VCC, Float (External), GND
ADR0: H, NC, L
JP3
Address Pin ADRO Select
ADR1: H, NC, L
JP4
Address Pin ADR1 Select
ADR2: H, NC, L
JP5
Address Pin ADR2 Select
WRITE PROTECT: LOCK, WRITE
JP6
Write Protect for EEPROM
NOMENCLATURE
CONNECTOR
DESCRIPTION
DC590
J1
Connection for DC590 Aux Demo Board
DC1613
J2
Connection for DC1613 Aux Demo Board
Table 5. Conectors
Operating Principles
Quick Start Procedure (Without Software)
The LTC4282 is a low voltage, high current Hot Swap
controller that has a 2.9V to 33V operating range and
a 45V absolute maximum voltage for the VDD pin. This
demo circuit is populated for 12V operation, but it can
easily be readjusted for any voltage between 2.9V and 30V
by replacing R1, R2, and R7 (top resistors in the UV/OV
divider and the FB divider). The DC2024A as supplied by
the factory is populated with a pair of PSMN1R5-30BLE
MOSFETs in D2PAK packages. A total of ten 3mΩ sense
resistors are used providing typically 100A of load current. The current limit and circuit breaker thresholds can
be adjusted by changing the sense resistors R25, R30,
R35, R41, R47, R52, R57, R62, R67, and R72 and/or the
value of ∆VSENSE via addressable registers in the LTC4282.
Several locations for MOSFET packages as well as additional
sense resistors are available on the front and rear of the
PCB for higher current configurations.
DC2024A is easy to set up to evaluate the performance of
the LTC4282. Refer to Figure 1 for proper measurement
equipment setup and follow the procedure below.
WARNING
The DC2024A is capable of operation in excess of 100A.
At this current and power level, there is a danger of serious personal injury and equipment damage if proper
techniques are not used. All cabling between the power
supply and the load should be capable of handling the
current levels used.
Additionally, the high currents and fast transients can
cause unexpected voltage drops in cables connecting the
test equipment to the DC2024A due to parasitic resistance
and inductance. The cable drops may cause ground loops
for the current via various cables and scope probes. This
will cause unexplained ringing, distorted oscilloscope
waveforms, voltage and current spikes, and signals appearing to be below ground.
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DEMO MANUAL DC2024A
Quick Start Procedure
A common sneak path for current is the third wire
grounds used on power cords of test equipment in use.
Using ground lifting connectors at the wall outlet won’t
necessarily alleviate these effects since most equipment
has line bypassing capacitors between the mains voltage
and local chassis ground. Isolating test equipment using
line isolation transformers with low primary to secondary
capacitance is recommended. Probe ground leads may
intercept induced fields from the high current paths and
should be minimized or avoided
Another method to remove these artifacts is the use of
a differential scope probe connected between the signal
to be observed and a ground connection located close to
the point of measurement.
Also be careful to not allow an open ground from the
power supply or load to cause return current through the
grounds of the various devices connected to the demo
board. This may present a fire hazard or cause damage
to the test equipment.
The DC2024A is set up to operate in a 12V system at
current levels up to 100A. At 100A, the MOSFETs are
dissipating 3.75W each and additional air flow may be
needed to keep them within safe thermal operating limits
for continuous operation. If additional current is required
without sufficient air flow, multiple MOSFETs should be
connected in parallel with the existing MOSFETs to lower
the I2R losses.
Jumper Positions
JUMPER
NAME
POSITION
JP1
CLK
EXT
JP2
ON
INTVCC
JP3
ADR0
NC
JP4
ADR1
NC
JP5
ADR2
NC
JP6
WRITE PROTECT
LOCK
Powering Up
Connect power supply capable of 120A at 0V to 20V to
the 12V input as shown in Figure 1. Verify cabling shown
in extra bold lines is capable of carrying 100A safely. The
GND connection does not handle high current so no high
current cabling is required.
4
Generally, an electronic load will be used. If this is true,
use it in the constant resistance mode. Use in constant
current will prevent start up because of current foldback
in the LTC4282. Current foldback is used to minimize
dissipation in the MOSFETs used as pass devices with
the LTC4282. To effect this, current is initially limited to
approximately 1/3 of full limit until the output voltage is
above 10V. If a constant current load is used and set to
100A, the LTC4282 will not start up and a current fault
will be reported.
UV/OV Thresholds
With no load on the output, slowly increase the voltage
on the input to the board. Observe the input voltage when
LED D2 (OUT) illuminates. This voltage should be between
10.7V and 11.4V. Continue increasing the voltage until D2 is
extinguished. This should occur between 14.4V and 15.3V.
Output Voltage Slew Rate
With no load connected, observe the output voltage
between turret 12VOUT (E5), and GND. Apply 12V to the
12VIN connector. The output voltage should slew from 0V
to 12V in 10ms to 25ms.
Output Current Limit
Turn off power supply and connect electronic load to the
DC2024 as shown in Figure 1. Disable electronic load.
Adjust power supply to 12V and verify its current level is
set to >120A.
Slowly increase conductance of the electronic load while
monitoring current. As the load increases to around 100A,
the output voltage and current will fall to zero. Note the
current where this occurs. This should be 95A to 105A.
Ability to Charge Output Capacitor
Turn off power supply and disconnect electronic load.
Replace load with a 10,000µF capacitor rated at 15V or
greater. Turn on power supply and observe that the output
voltage rises to 12V indicating the DC2024 has connected
to the load and successfully charged the output capacitance.
Monitor the current during the period when the capacitor
is charging, it should be a maximum of 12A.
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DEMO MANUAL DC2024A
Quick Start Procedure
Software Control with LTpowerPlay™
LTpowerPlay is a convenient PC software GUI that gives
complete access to the registers of the LTC4282, and
many other Linear Technology power system management
parts. Use it in offline mode to build a system configuration file even with no hardware plugged-in, and use it
with hardware connected to configure and debug your
application. LTpowerPlay communicates using the I2C bus
in the demo system (covered in this manual), or in your
real-world product environment. It provides unprecedented
control over the Linear Technology ICs on the I2C bus.
Use it during board bring-up to tune and optimize the
power system parameters. Use it during system debug to
view critical system information and troubleshoot board
design or manufacturing issues. LTpowerPlay includes
extensive help and documentation under the help menu.
Online help includes quick start videos and tutorials, and
detailed technical documentation from the Linear Technology website. Getting started with LTpowerPlay is easy.
Simply download and install the PC software from here:
http//www.linear.com/ltpowerplay
Figure 2. DC2024A-A Demo Board Connected to DC1613 I2C-to-USB Converter
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DEMO MANUAL DC2024A
Quick Start Procedure
The DC1613 USB-to-I2C adapter interfaces the PC running
LTpowerPlay to the DC2024A board. Connect the DC1613
adapter to the PC through a USB cable, and connect the
DC2024A board through the ribbon cable to connector J2.
Launch the LTpowerPlay GUI on the PC. The software
identifies the DC1613 controller, then the DC2024A board,
and begins communicating through the I2C bus with the
LTC4282. Once this communication has been established,
the GUI displays its main window (Figure 3).
The LTpowerPlay GUI divides information into separate
panes in the window. On the left is the system tree pane
(Figure 4), displaying a list of all Linear Technology devices
identified on the I2C bus. For a single LTC4282 device,
the tree is small, but if other supported devices are present on the I2C bus, LTpowerPlay will add them. Click on
a device in this list to selectively access it. Information in
other panes pertains to the selected device.
LTpowerPlay System Tree
Figure 4. LTpowerPlay System Tree
To the right of the system tree is the configuration register
pane. The Figure 5 view shows all of the writable userconfigurable registers available on the selected device.
The GUI offers clickable buttons and fields to edit the
information in these registers.
Figure 3. LTpowerPlay GUI Window
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DEMO MANUAL DC2024A
Quick Start Procedure
Figure 5. LTpowerPlay Configuration Registers
Update register contents by clicking or typing to change
the desired registers. Then selecting the PC to RAM button
in the top toolbar (Figure 6). LTpowerPlay writes changes
to the updated registers.
Right of center in LTpowerPlay is the telemetry pane
(Figure 7), displaying read-only information contained in
the status registers of the selected part. The GUI periodically polls the I2C bus and updates the telemetry content,
along with a user-friendly interpretation of the bits.
Figure 6. PC to RAM Button
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DEMO MANUAL DC2024A
Quick Start Procedure
Figure 7. LTpowerPlay Telemetry
In the upper right corner of LTpowerPlay is the chip dashboard pane (Figure 8), displaying a graphical representation
of the part status in a friendly, easy-to-understand format.
The meter in the upper left of the panel displays the static
input energy to the card in watts. The small dials in the
center of the input energy meter display the energy used
in kilojoules. The VSOURCE meter displays the voltage
at the SOURCE pin of the LTC4282, which is the same
as VOUT. The Input meter displays the voltage input at
the VDD pin of the LTC4282. VSENSE indicates the input
current derived by dividing the voltage measured across
the sense resistor by the value of the sense resistor. The
power meter displays the SOURCE voltage multiplied
by the current sense voltage and scaled to indicate the
power in watts. VGPIO3 displays the voltage at GPIO3
when it is configured as an analog input. The FET Status
annunciators show the status of the pass MOSFETs as
described in the FET-BAD Fault section of the data sheet.
GPIO1, GPIO2 and GPIO3 show the status of the general
purpose input/output pins.
On the lower right of the GUI window is the telemetry
plot pane (Figure 9). By selecting various measurement
functions in the telemetry pane, a graphic display of that
function versus time is displayed. This gives an instant
indication on how that function varies with time.
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DEMO MANUAL DC2024A
Quick Start Procedure
Figure 8. LTpowerPlay Chip Dashboard
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DEMO MANUAL DC2024A
Quick Start Procedure
Figure 9. LTpowerPlay Telemetry Plot
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DEMO MANUAL DC2024A
Quick Start Procedure
LTC4282 CHIP
COMPUTER WITH
LTpowerPlay
I2CBUS
STORE
RAM
RESTORE
EEPROM
LTC4282
LOGIC
Figure 10. LTC4282 RAM and Non-Volatile Memory
The LTC4282 is highly configurable through its register
set. Refer to the LTC4282 data sheet for a complete
discussion of the registers and functions available. Get
immediate access to detailed help for the selected register
in LTpowerPlay by pressing the F1 key on your keyboard.
The LTC4282 features non-volatile EEPROM that holds
device configuration information and a snapshot of past
fault information. When the part receives power it executes
a power-on reset, and restores the contents of the EEPROM
to its operating RAM. Following this power-on restore, operating RAM can be modified with I2C bus commands that
modify the part behavior. These modifications are effected
by using the PC>RAM button in the toolbar. Also included
in the toolbar are buttons for reading the internal RAM
data on the PC by using the RAM>PC button on the tool
bar. Similarly, there are buttons for moving the contents
of the RAM to the NVM (EEPROM) and vice versa using
the RAM>NVM and NVM>RAM buttons on the toolbar.
Programming Socket
The DC2024A-B board includes a programming socket.
This socket in conjunction with the LTpowerPlay software
GUI and DC1613 USB-to-I2C adapter may be used to
program the EEPROM of multiple LTC4282 ICs prior to
their installation on a PC board.
Please refer to Application Note 145, http://cds.linear.com/
docs/en/application-note/AN145f.pdf, and refer to Option
1A. Use the device address 0x88, which is the address to
which the programming socket is hard wired. Also verify
that the LTC4282 already soldered on the board (U1) is
set to a different address than 0x88 to prevent a conflict.
Follow the instructions for Option 1A on page 3 of
Application Note 145.
Figure 11. Read Write NVM Buttons on Toolbar
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DEMO MANUAL DC2024A
Parts List
ITEM
QTY
1
2
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
C1, C8
CAP., POLARIZED, OPTION
NICHICON, UVR1E102MPD OR EQUIVALENT
2
2
C2, C3
CAP., 33pF, X7R, 16V, 5%, 0603
AVX, 0603YC330JAT2A
3
1
C4
CAP., OPTION, 0603
N/A
4
2
C5, C14
CAP., 0.1µF, X7R, 16V,10%, 0603
AVX, 0603YC104KAT2A
5
1
C6
CAP., 1µF, X7R, 16V, 10%, 0603
AVX, 0603YC105KAT2A
6
1
C7
CAP., 0.47µF, X7R, 16V, 10%, 0603
TDK, C1608X7R1C474K
7
2
C9, C10
CAP., 0.01µF, X7R, 50V, 10%, 0603
AVX, 06035C103KAT2A
8
2
C11, C12
CAP., 0.022µF, X7R, 50V, 5%, 0805
KEMET, C0805C223J5RACTU
9
1
C13
CAP., 0.1µF, X7R, 25V, 20%, 0603
TDK, C1608X7R1E104M080AA
10
7
D1-D3, D6-D9
LED, GREEN, WATERCLEAR, 0805
WURTH, 150080GS75000
11
2
D4, D5
LED, RED, WATERCLEAR, 0805
WURTH, 150080RS75000
12
4
D10-D12, D15
DIODE, TVS, 28V, SMC
DIODES INC./ ZETEX, SMCJ28A-13
NO STUFF
13
0
D13, D14
NO STUFF
14
2
E1, E2
ONE-HOLE, OFFSET FLOATING TONGUE LUG PANDUIT, CB175-38-QY
15
20
E3-E20, E22, E23
TEST POINT, TURRET, .064 MTG. HOLE,
.125" THICK PCB
MILL-MAX, 2308-4-00-80-00-00-07-0
16
1
E21
BANANA JACK, NON-INSULATED
KEYSTONE, 575-4
17
1
J1
CONN., HEADER, 2×7, 2mm, SHROUDED,
THRU-HOLE, VERTICAL
MOLEX, 87831-1420
18
1
J2
CONN., HEADER, 12 POS 2mm
FCI, 98414-G06-12ULF
19
2
JP1, JP6
CONN., HEADER, 1×3, 2mm, THRU-HOLE,
VERTICAL
SAMTEC, TMM-103-02-L-S
20
4
JP2-JP5
CONN., HEADER, 1×4, 2mm, THRU-HOLE,
VERTICAL
SAMTEC, TMM-104-02-L-S
21
4
MP1-MP4
BUMPER, RECESSED, #4 SCREW, BLACK
KEYSTONE, 727
22
4
MP5-MP8
WASHER, FLAT, SS 18-8, #4
BOLT DEPOT, 5563
23
4
MP9-MP12
MACHINE SCREW, #4-40 × 1/2 PHILLIPS
PAN HEAD, ZINC
BOLT DEPOT, 7593
24
4
MP13-MP16
LOCK WASHER, INT. TOOTH, ZINC, #4
BOLT DEPOT, 3011
25
4
MP17-MP20
HEX NUT, #4-40, SS 18-8
BOLT DEPOT, 4115
26
2
MP21, MP22
HEX NUT, FULL, 3/8-16, 9/16 IN.
GRAINGER, 1WB27
27
2
MP23, MP25
FLAT WASHER, SS 18-8, 3/8 IN.
GRAINGER, 6FDG6
28
2
MP26, MP27
LOCK WASHER, INT., 0.398 IN. ID
GRAINGER, 2DE18
29
2
MP28, MP29
HEX HEAD BOLT, 3/8-16 × 1-1/8 IN.
GRAINGER, 30Z861
30
2
Q1, Q2
TRANSISTOR, MOSFET, D2PAK
NXP, PSMN1R5-30BLE,118
31
3
Q3-Q5
TRANS., MOSFET N-CH., 60V SOT-23
VISHAY SILICONIX, 2N7002K-T1-GE3
32
0
Q6, Q7
NO STUFF
NO STUFF
33
0
Q8, Q10, Q13, Q15
NO STUFF
NO STUFF
34
0
Q9, Q11, Q12, Q14
NO STUFF
NO STUFF
35
1
R1
RES., 34.8k, 1/10W, 1%, 0603
YAGEO, RC0603FR-0734K8L
36
1
R2
RES., 1.18k, 1/10W, 1%, 0603
YAGEO, RC0603FR-071K18L
37
1
R3
RES., 3.4k, 1/10W, 1%, 0603
YAGEO, RC0603FR-073K4L
38
5
R4-R6, R17, R18
RES., 10k, 1/4W, 5%, 1206
PANASONIC, ERJ-8GEYJ103V
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DEMO MANUAL DC2024A
Parts List
ITEM
QTY
39
1
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
R7
RES., 22.1k, 1/10W, 1%, 0603
YAGEO, RC0603FR-0722K1L
40
4
R8, R10, R11, R21
RES., 3.01k, 1/10W, 1%, 0603
YAGEO, RC0603FR-073K01L
41
3
R9, R19, R20
RES., OPTION, 0603
N/A
42
4
R12-R14, R22
RES., 5.11k, 1/10W, 1%, 0603
YAGEO, RC0603FR-075K11L
43
11
R15, R16, R135, R140-R142,
R151-R155
RES., 0Ω, 1/10W, 0603
YAGEO, RC0603JR-070RL
44
40
R23, R24, R26-R29, R31-R34,
R36-R39, R42-R44, R46, R48-R51,
R53-R56, R58-R61, R63-R66,
R68-R71, R74, R75
RES., 1Ω, 1/16W, 1%, 0402
VISHAY, CRCW04021R00FKED
45
10
R25, R30, R35, R41, R47, R52, R57,
R62, R67, R72
RES., 0.003Ω, METAL ELEMENT, 1%, 2W
2512
OPTEK TECHNOLOGY (TT ELECTRONICS),
LRMAT2512-R003FT4
46
10
R40, R73, R143-R150
RES., 10Ω, 1/10W, 5%, 0603
YAGEO, RC0603JR-0710RL
47
2
R45, R76
RES., 59k, 1/10W, 1%, 0603
VISHAY DALE, CRCW060359K0FKEA
48
0
R77, R78, R80-R83, R85-R88,
R90-R95, R97-R100, R102, R103,
R105-R108, R110-R113, R115-R120,
R122-R125, R127-R130, R132, R133
NO STUFF
NO STUFF
49
0
R79, R84, R89, R96, R101, R109,
R114, R121, R126, R131
NO STUFF
NO STUFF
50
0
R104, R134
NO STUFF
NO STUFF
51
1
R136
RES., 2k, 1/10W, 1%, 0603
YAGEO, RC0603FR-072KL
52
0
R137-R139
NO STUFF
NO STUFF
53
0
SKT1
NO STUFF -A, SOCKET -B
PLASTRONICS, 32QN50515050-E
54
0
TP1-TP8
NO STUFF
NO STUFF
55
1
U1
IC, HI-CURRENT HOT SWAP CONTROLLER,
QFN
LINEAR TECH., LTC4282CUH#PBF
56
1
U2
IC, SERIAL EEPROM, 2k BIT, 400kHz,
TSSOP-8
MICROCHIP TECH., 24LC025-I/ST
57
6
XJP4-XJP6, XJP10-XJP12
SHUNT, 2mm
SAMTEC, 2SN-BK-G
58
1
Y1
CRYSTAL, 4MHz, SMT
ABRACON, ABLS-4.000MHZ-B4-T
59
0
Y2
NO STUFF
NO STUFF
60
3
Z1-Z3
DIODE, ZENER 5.1V 500mW SOD-123
FAIRCHILD, MMSZ5231B
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1
2
3
ON
E17
E16
E12
E8
E11
E9
E7
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
J2 DC 1613
GND
GND
GND
GPIO
EEVCC
EESDA
EESCL
EEGND
CS
SCK/SCL
MOSI/SDA
MISO
VCCIO
VUNREG
J1
TM
Quik Eval
GND
EXT 5V
ALERT
SCL
SDA
GND
(SHORT PIN)
1
2
4
1
2
3
4
5
6
7
8
9
10
11
12
3
8
13
14
10
9
11
12
6
4
7
5
2
1
2
R152
SCL
+5V
+5V
SCL
A
SCL
SDA
0.0
SDA
D1
IN
GREEN
R5
10k
SDA
1
D15
SMCJ28A
2
1
R153 0.0
+5V
+5V
SCL
SDA
GPIO3
D8
GPIO3
GREEN
R154
0.0
R4 10k
R155
0.0
GPIO2
R3
3.4k
TIMER
GPIO2
D9
GPIO2
GREEN
C6
1.0uF
E18
C13
0.1uF
Z2 MMSZ5231B
5.1V
1
2
R2
1.18k
GPIO1
Z3 MMSZ5231B
5.1V
1
2
R6 10k
2
1
E1
B
C7
.068uF
OV UV
E20 E19
R1
34.8k
H
TIMER
VCC
ALERT
SCL
SDAO
SDAI
OV
UV
ADR2
JP5
4
3
2
1
TP1
TP2
U2
24LC025-I /ST
8
A0 VCC
2
7
A1
WP
3
6
A2 SCL
4
5
VSS SDA
1
C14
0.1uF
L
NC
6
5
15
14
13
12
2
32
SENSE+2
ADC+
SENSE+1
INPUT
29
+12V IN
1
ON
28
ADC+
30
SENSE+1
31
VDD
NC
16
GATE2
GATE1
SOURCE
SENSE-2
ADC-
SENSE-1
U1
LTC4282
ADR2
JP4
4
3
2
1
R12
5.11k
11
ADR1
10
ADR0
R13
5.11k
ADR1
9
LOCK
4
SENSE+2
25
SENSE-2
26
ADC-
27
24
R151
0.0
C
FB
CLK_O
CLK_I
GPIO3
GPIO2
GPIO1
C
ADR0
JP3
4
3
2
1
R14
5.11k
SENSE-1
22
GATE1
23
GATE2
33
EXPOSED PAD
SOURCE
GND
3
KGND
20
L
C2
33pF
C3
33pF
+5V
R22
5.11k
WRITE
LOCK
1
Q3
2N7002
JP2
RED
D5
ALERT
R21
3.01k
2
Y2
OPT
GND
GPIO3
GPIO2
3
2
1
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
D
SCALE = NONE
LTC4282IUH
+5V
INTVCC
R15 0.0
GPI01
INT VCC
GND
E15
E4
GPI03
E14
GPI02
E13
E3
+12V OUT
100 AMPS
+12V OUT
DATE: Friday, May 22, 2015
DC2024A-A
SKU NO.
E
SHEET
1
710-DC2024A REV 05
SCHEMATIC NO. AND REVISION:
HIGH CURRENT HOT SWAP CONTROLLER
WITH I²C COMPATIBLE MONITORING AND EEPROM
OF
5
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
STUFFED
SKT 1 ( PAGE 4 )
NOT STUFFED
DC2024A-B
LTC SKU#
ASSEMBLY OPTIONS
GND
DC2024A-A
TITLE: DEMO CIRCUIT SCHEMATIC,
SDA
E21
2. ALL CAPACITORS THIS PAGE ARE 0603.
1. ALL RESISTORS THIS PAGE ARE 1% 0603.
D7
GREEN
SCL
E5
E2
R16 0.0
Z1
MMSZ5231B
5.1V
E
UNLESS OTHERWISE NOTED:
R20
OPT
2
1
R11
3.01k
R19
OPT
D3
GPIO1
GREEN
R17
10k
Q5
2N7002
EXT
INT
D6
GREEN 1
JP1
CLK
D2
OUT
GREEN
SCL
R10
3.01k
APPROVALS
1
R18
10k
GPIO1
Q4
2N7002
FLOAT
INTVCC
E10
4
3
2
1
ON
GND
CUSTOMER NOTICE
3
2
1
WRITE PROTECT
JP6
Y1
4.0 Mhz
C4
(0.1u)
OPT
R9
OPT
(300K)
INTVCC
= HIGH-CURRENT CONNECTIONS
D
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
PCB DES.
M.HAWKINS
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO APP ENG.
BOB SMITH
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
SIZE:
N/A
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
IC NO.
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
NC
H
7
8
17
18
19
21
R8 3.01k
R7 22.1k
1
2
CONNECTIONS TO PAGES 2 AND 3
1
3
2
B
3
2
3
2
1
2
1
2
1
2
1
A
3
+12V IN
2
2
14
1
E6
1
2
3
4
DEMO MANUAL DC2024A
Schematic Diagram
dc2024afa
1
+
SENSE+2
D10
SMCJ28A
INPUT
1
2
A
D11
SMCJ28A
1
1
TP5
1
D12
SMCJ28A
NICHICON P/N UVR1E102MPD SENSE+2
OR EQUIVALENT
1000 uF
OPTIONAL
C8
1
2
2
INPUT
ADC+
ADC+
ADC+
TP4
SENSE+1
SENSE+1
1
2
3
1
2
TP3
1
2
D13
SMCJ28A
OPT
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
R28
R31
R33
R36
R38
R42
R46
R48
R50
R53
R55
R58
R60
R63
R65
R68
R70
R74
B
1.0
R26
D14
SMCJ28A
OPT
1.0
R23
B
R75
R71
R69
R66
R64
R61
R59
R56
R54
R51
R49
R44
R43
R39
R37
R34
R32
R29
R27
R24
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
B
C
5
4
Q9
3
PSMN1R5-30BLE
Q1
ADC-
SENSE-2
SENSE-2
TP8
ADC-
TP7
1
Q2
Q11
1
E22
2
3
3
2
1
2
3
3
2
1
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
D
SCALE = NONE
LTC4282IUH
+
SOURCE
C1
1000 uF
OPTIONAL
SKU NO.
DATE: Friday, May 22, 2015
E
SHEET
2
710-DC2024A REV 05
SCHEMATIC NO. AND REVISION:
HIGH CURRENT HOT SWAP CONTROLLER
WITH I²C COMPATIBLE MONITORING AND EEPROM
NICHICON P/N UVR1E102MPD
OR EQUIVALENT
E
OF
5
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: DEMO CIRCUIT SCHEMATIC,
C12 0.022uF
DC2024A-A
R76 59k
50V
C10 0.027uF
PRIMARY SIDE
"Q2"
R45 59k
C11 0.022uF
50V
C9 0.027uF
PRIMARY SIDE
"Q1"
APPROVALS
R73 10
R145 10
R146 10
R40 10
R143 10
R144 10
D
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
PCB DES.
M.HAWKINS
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO APP ENG.
BOB SMITH
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
SIZE:
N/A
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
IC NO.
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
CUSTOMER NOTICE
GATE2
GATE2
N-CHANNEL UNIVERSAL
1
(OPT)
3
PSMN1R5-30BLE
4
PSMN2R0-30YLE
4
(OPT)
Q10
5
E23
GATE1
GATE1
(OPT)
1
PSMN2R0-30YLE
4
(OPT)
Q8
SENSE-1 N-CHANNEL UNIVERSAL
SENSE-1
(TO BOTTOM SIDE)
1
1
1
TP6
A (TO BOTTOM SIDE)
UNLESS OTHERWISE NOTED:
1. ALL RESISTORS THIS PAGE ARE 1% 0402.
2. ALL CAPACITORS THIS PAGE ARE 0603.
3. ALL 0.003 OHM SENSE RESISTORS ARE SIZE 2512.
=HIGH CURRENT CONNECTIONS
PRIMARY SIDE
"RS2"
R72
3 mohm
R67
3 mohm
R62
3 mohm
R57
3 mohm
R52
3 mohm
R47
3 mohm
R41
3 mohm
R35
3 mohm
R30
3 mohm
R25
3 mohm
PRIMARY SIDE
"RS1"
C
1
2
4
1
2
A
1
2
3
4
DEMO MANUAL DC2024A
Schematic Diagram
dc2024afa
15
16
1
2
3
4
INPUT
SENSE+2
ADC+
SENSE+1
A
R117
R105
R92
A
OPT
OPT
OPT
OPT
OPT
R87
R90
(FROM TOP SIDE) B
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
OPT
(FROM TOP SIDE) A
R118
R106
B
C
C
GATE1
5
3
Q12
1
10
9
8
7
6
5
4
3
2
4
1
3
2
1
2
10
10
10
5
3
1
10
9
8
7
6
5
4
3
2
4
1
3
2
1
2
CUSTOMER NOTICE
R134
R147
10
10
10
Q7
PSMN2R0-30YLE
(OPT)
Q15
"Q1"
SECONDARY SIDE
STV300NH02L
(OPT)
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
D
SCALE = NONE
LTC4282IUH
SOURCE
E
DATE: Friday, May 22, 2015
DC2024A-A
SKU NO.
E
SHEET
3
710-DC2024A REV 05
SCHEMATIC NO. AND REVISION:
HIGH CURRENT HOT SWAP CONTROLLER
WITH I²C COMPATIBLE MONITORING AND EEPROM
TITLE: DEMO CIRCUIT SCHEMATIC,
OF
5
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
SECONDARY SIDE STUFFING OPTIONS, THIS PAGE
APPROVALS
PSMN2R0-30YLE
(OPT)
Q13
SECONDARY SIDE
"Q2"
STV300NH02L
(OPT)
Q6
N-CHANNEL UNIVERSAL
(OPT)
11
R148
R104
R149
11
R150
Q14
N-CHANNEL UNIVERSAL
(OPT)
D
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A PCB DES.
M.HAWKINS
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO APP ENG.
BOB SMITH
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
SIZE:
N/A
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
IC NO.
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
GATE2
SENSE-2
ADC-
SENSE-1
UNLESS OTHERWISE NOTED:
1. ALL RESISTORS THIS PAGE ARE 1% 0402.
2. ALL OPTIONAL SENSE RESISTORS ARE SIZE 2512.
OPT
OPT
R93 OPT
=HIGH CURRENT CONNECTIONS
SECONDARY SIDE
R133
OPT
"RS2"
R130
OPT
R128
R132
R125
R123
R129
R131
OPT
R126
OPT
R120
OPT
OPT
R122
R121
OPT
OPT
OPT
R119
R116
R113
R111
R108
R103
R100
R98
R95
R91
R88
R86
R83
R127
OPT
R115
R114
OPT
R109
OPT
R101
OPT
R96
OPT
R89
OPT
R84
OPT
R81
R78
R124
OPT
OPT
R112
OPT
R110
R102
R107
OPT
OPT
R99
OPT
OPT
R85
R97
OPT
R82
OPT
OPT
R80
R94
OPT
R77
R79
OPT
SECONDARY SIDE
"RS1"
B
1
2
3
4
DEMO MANUAL DC2024A
Schematic Diagram
dc2024afa
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.
1
2
3
4
A
SOCKET
POWER
0N
C5
0.1uF
D4
RED
R136
2k
SOCKET POWER
2
1
+5V
SCL
SDA
R135
0.0
OPTIONAL PROGRAMMING SOCKET,
C
R140
0.0
TEST SOCKET
R141
0.0
SKT1
24
APPROVALS
7
8
B
C
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
LTC4282IUH
DC2024A-A
SKU NO.
D
E
SHEET
4
710-DC2024A REV 05
SCHEMATIC NO. AND REVISION:
HIGH CURRENT HOT SWAP CONTROLLER
WITH I²C COMPATIBLE MONITORING AND EEPROM
E
OF
5
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: DEMO CIRCUIT SCHEMATIC,
1. ALL RESISTORS THIS PAGE ARE 0603.
UNLESS OTHERWISE NOTED:
D
DATE: Friday, May 22, 2015
17
18
19
21
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
PCB DES.
M.HAWKINS
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO APP ENG.
BOB SMITH
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
SIZE:
N/A
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
IC
NO.
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
R142
0.0
CLK_O
CLK_I
GPIO3
GPIO2
GPIO1
FB
INSTALLED ON -B ASSEMBLY OPTION
28
CUSTOMER NOTICE
OPT
R139
OPT
TIMER
VCC
ALERT
SCL
SDAO
SDAI
OV
UV
OPT
6
5
15
14
13
12
2
32
R138
R137
B
1
ON
29
SENSE+1
30
ADC+
31
VDD
NC
16
ADR2
11
ADR1
10
ADR0
9
LOCK
4
SENSE+2
26
ADC-
25
SENSE-2
27
SENSE-1
23
GATE2
33
22
GATE1
EXPOSED PAD
SOURCE
GND
3
KGND
20
A
1
2
3
4
DEMO MANUAL DC2024A
Schematic Diagram
dc2024afa
17
DEMO MANUAL DC2024A
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
dc2024afa
18 Linear Technology Corporation
LT 0116 REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2015