ADM1170/ADM1171/ADM1172EB PDF

Evaluation Kit for
ADM1170, ADM1171, ADM1172
EVAL-ADM1170/ADM1171/ADM1172
PRODUCT DESCRIPTION
This evaluation board allows the ADM1170, ADM1171, and
ADM1172 to be easily evaluated. These parts are hot swap
controllers with enable input and gate pin output to drive an
external FET. The hot swap control circuitry allows the boards
to be safely inserted and removed from a live 1.6 V to 16.5 V
backplane. The parts provide precise, robust, current-limiting
protection against transient and nontransient short circuits as
well as undervoltage and overcurrent conditions.
In addition to the standard hot swap functionality, the ADM1170
has an additional supply pin that allows voltage monitoring on
a supply rail to go as low as 1.6 V. The ADM1171 features a
current sense output (CSOUT) pin. The voltage on the CSOUT
pin represents the voltage drop across the sense resistor gained
up by a factor of 20. Both ADM1170 and ADM1171 feature a
soft start function that provides the user with a capacitor programmable ramping reference to the internal current-sense
comparator. This provides a linearly increasing current limit at
startup at a rate set by the soft start capacitor (CSS), which helps
to reduce and limit large inrush currents. The ADM1172 features
a power-fail comparator. The voltage on the PFI pin is compared
with an internal 0.6 V reference, and the output of this
comparator is presented on the PFO pin.
All these devices are available in two options: the ADM117x-1
with automatic retry for overcurrent fault and the ADM117x-2
with latch-off for an overcurrent fault. Toggling the ON (ONCLR) pin resets a latched fault. All parts are packaged in an
8-lead TSOT.
Order codes for evaluation kits are shown in the Ordering
Guide. (Pinouts and detailed package drawings can be found
in the individual product data sheets.)
EVALUATION BOARD DESCRIPTION
The ADM1170/ADM1171/ADM1172 hot swap controller
evaluation board contains all the necessary components for
evaluating all features of the devices. This board requires a
bench power supply of between 2.7 V and 16.5 V, connected
through J1 and J3 or, alternatively, through the corresponding
connectors on J4.
This board is capable of evaluating the ADM1170, ADM1171,
and ADM1172 parts by simply changing certain connectors to
suit specific evaluation plan.
Download the latest version of the configuration tool from
Analog Devices, Inc., at www.analog.com/powermonitorsw.
PACKAGE CONTENTS
ADM1170/ADM1171/ADM1172 main evaluation board
ADM1170, ADM1171, and ADM1172 device samples
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
www.analog.com
Tel: 781.329.4700
Fax: 781.461.3113
©2008 Analog Devices, Inc. All rights reserved.
EVAL-ADM1170/ADM1171/ADM1172
TABLE OF CONTENTS
Product Description ......................................................................... 1
Timer Block ....................................................................................6
Evaluation Board Description......................................................... 1
Sense Resistor and FET ................................................................6
Package Contents .............................................................................. 1
Current Sense Output (CSO).......................................................6
Revision History ............................................................................... 2
PFI/PFO Block ...............................................................................6
Evaluation Board Hardware ............................................................ 3
LEDs ................................................................................................6
Hardware Components................................................................ 3
Pin Access .......................................................................................6
Switch, Jumper, and LED Functions .......................................... 3
Additional Components ...............................................................6
Operating the Evaluation Board ..................................................... 5
Evaluation Board Schematic ............................................................7
Additional Features ...................................................................... 5
Ordering Information .......................................................................8
Powering the Evaluation Board .................................................. 5
Bill of Materials ..............................................................................8
ON (On-CLR) Input Block ......................................................... 6
Ordering Guide .............................................................................9
Soft Start Capacitors Block .......................................................... 6
ESD Caution...................................................................................9
REVISION HISTORY
6/08—Revision 0: Initial Version
Rev. 0 | Page 2 of 12
EVAL-ADM1170/ADM1171/ADM1172
EVALUATION BOARD HARDWARE
HARDWARE COMPONENTS
Main Evaluation Board
Device Samples
The evaluation board contains all of the circuitry necessary to
simulate real hot swap events such as a hot swap control FET,
sense resistor, and timing components. It also has an adjustable
resistor circuit to evaluate the performance of the power-fail
comparator for the ADM1172 part.
Some loose samples of the device to be evaluated are included
in a samples box. A single device should be placed in the socket
before powering up the evaluation board. The device should be
orientated in the socket such that Pin 1 is in the top left corner,
near to U3.
SWITCH, JUMPER, AND LED FUNCTIONS
Table 1. Connector Functions
Switch
S1
S1-ON
S1-OFF
S1-TOGGLE
S1_TIMER
S1-1
S1-2
S1-3
S1-4
S2-S
S2-1
S2-2
S2-3
S2-4
Description
ON (ON-CLR) pin setting switch
Device enable
Device disable
Reset a latched fault (for ADM1170, ADM1171, and ADM1172 parts)
Timer pin setting switch
Connects to a 22 nF capacitor, enables 5.7 ms initial delay and 476.6 μs circuit breaker delay
Connects to a 47 nF capacitor, enables 12.2 ms initial delay and 1.01 ms circuit breaker delay
Connects to a 470 nF capacitor, enables 122.2 ms initial delay and 10.18 ms circuit breaker delay
Connects empty footprint for user-defined capacitor (CT4) on the TIMER pin
Soft start pin setting switch (ADM1170 and ADM1171 only)
Connects to a 1 nF capacitor, allowing 100 μs ramp-up delay
Connects to a 10 nF capacitor, allowing 1 ms ramp-up delay
Connects to a 47 nF capacitor, allowing 4.7 ms ramp-up delay
Connects empty footprint for user-defined capacitor (CS4) on the SS pin
Default
On
Closed
Open
Open
Open
Closed
Open
Open
Open
Table 2. Jumper Functions
Jumper
LK_ON
LK_VCC
LK_PFI
PFI_IN
Description
Insert to enable manual enable/disable/reset control using Switch S1 or logic input on J1-1 (when S1 is on);
deassert to use external logic signals on Connector J4-7 to control device enable/disable/reset
Applies to the ADM1170; insert to power device from mail power rail; deassert to power device from Connector
J4-1 for low voltage monitoring mode
Applies to the ADM1172; link between the PFI pin and Potentiometer VR1; this allows the user to evaluate the
performance of PFI on voltage input or voltage output; deassert if using Connector J4-8 for PFI input
Applies to the ADM1172; allow VIN (Position A) or VOUT (Position B) to be linked with the PFI pin through
Potentiometer VR1
Table 3. LED Functions
LED
D1
D2
D4
D5
Name
ON indicator
PFO indicator
VOUT indicator
VIN indicator
Description
Indicates if the device is enabled
Indicates if the PFO output is present
Indicates if the output voltage is present
Indicates if the supply voltage is present
Rev. 0 | Page 3 of 12
Default
Inserted
Insert for
ADM1170
Insert for
ADM1172
Position B
EVAL-ADM1170/ADM1171/ADM1172
To configure an evaluation board to a specific device ensure the links in Table 4 are inserted.
Table 4. Configuration Links
Link
CL1
CL2
CL3
CL4
CL5
CL6
Description
Configuration link applies to ADM1170 and ADM1171
Configuration link applies to ADM1170
Configuration link applies to ADM1171 and ADM1172
Configuration link applies to ADM1172
Configuration link applies to ADM1171 and ADM1172
Configuration link applies to ADM1170
Table 5. Soft Start Capacitor Value and Delay Time Reference to the Configuration of Switch S2_S
Switch
1
2
3
4
Capacitor Value
1 nF
10 nF
47 nF
User Defined
Delay Time
100 μs
1 ms
4.7 ms
User Defined
Table 6. Timer Capacitor Value and Delay Time Reference to the Configuration of Switch S1_TIMER
Switch
1
2
3
4
Capacitor Value
22 nF
47 nF
470 nF
User Defined
Initial Delay—tINITIAL
5.7 ms
12.2 ms
122.2 ms
User Defined
Rev. 0 | Page 4 of 12
Circuit Breaker Delay—tCB
476.6 us
1.01 ms
10.18 ms
User Defined
EVAL-ADM1170/ADM1171/ADM1172
OPERATING THE EVALUATION BOARD
RSENSE 33mΩ
TIMER CAPACITORS
HOT SWAP
FET
LOAD+
VCC
VCC/SENSE+
LINK
SOFT START
CAPACITORS
PIN ACCESS
(J4)
PFI/PFO
GATE NODE
LOAD–
ON (ON-CLR) INPUT BLOCK
ADM1170 SOCKET
07418-001
GND
Figure 1. Evaluation Board
ADM1171
The ADM1170, ADM1171, and ADM1172 devices are
integrated hot swap controllers and current-sense amplifiers.
An internal current-sense amplifier senses voltage across the
sense resistor in the power path via the VCC and SENSE pins
(SENSE+ and SENSE− pins for the ADM1170). The ADM1170,
ADM1171, and ADM1172 limit the current through this resistor
by controlling the gate voltage of an external N-channel FET
in the power path via the GATE pin. The sense voltage (and
hence the inrush current) is kept below a preset maximum.
The ADM1170, ADM1171, and ADM1172 protect the external
FET by limiting the time that it spends with the maximum
current running in it. This current-limit period is set by the
choice of capacitor attached to the TIMER pin.
Additionally, the device provides protection from overcurrent
events at times after the hot swap event is complete. In the case
of a short-circuit event, the current in the sense resistor exceeds
an overcurrent trip threshold, and the FET is switched off
immediately by pulling down the GATE pin.
The ADM1170, ADM1171, and ADM1172 are packaged in an
8-lead TSOT.
The ADM171 has a current sense output (CSOUT) pin.
The voltage on the CSOUT pin represents the voltage drop
across the sense resistor gained up by a factor of 20. It also
contains a soft start function, which provides a capacitor
programmable ramping reference to the internal current
sense comparator.
ADM1172
The ADM1172 has a power-fail comparator output, for which
the voltage on the PFI pin is compared with an internal 0.6 V
reference, and the output of this comparator is presented on the
PFO pin.
POWERING THE EVALUATION BOARD
The ADM1170/ADM1171/ADM1172 evaluation board is
powered using a bench supply of between 2.7 V and 16.5 V,
connected to J1 _VIN and J3_ GND for ground. In this case,
the device is powered from the voltage input rail. Alternatively,
connectors on J4 can be used to power up the device. The load
can be connected between the red and black connectors, J5_VOUT
and J4_GND respectively.
ADDITIONAL FEATURES
ADM1170
The ADM1170 has an additional supply pin that allows voltage
monitoring on a supply rail to go as low as 1.6 V, and a soft start
function, which provides a capacitor programmable ramping
reference to the internal current-sense comparator.
Rev. 0 | Page 5 of 12
EVAL-ADM1170/ADM1171/ADM1172
The ADM1170 has a separate VCC pin and a SENSE+ pin,
which allow the device to hot swap low voltage rails while being
powered from a different supply. Jumper LK_VCC allows VCC
to be shorted to SENSE+ in order to power the device and hot
swap from the same rail (J1_VIN). By deasserting LK_VCC, the
ADM1170 device can be powered through the VCC pin on the J4
connector block; this enables the device to monitor a low level
voltage input from Connector J1_VIN or the VIN pin on the J4
connector block.
ON (ON-CLR) INPUT BLOCK
The ADM1170, ADM1171, and ADM1172 are available in
two options ADM1170-1, ADM1171-1, ADM1172-1 and
ADM1170-2, ADM1171-2, ADM1172-2. The ADM1170-1,
ADM1171-1, and ADM1172-1 have an autoretry function
that keeps retrying to clear a fault and the ADM1170-2,
ADM1171-2, and ADM1172-2 latch off until the ON pin is
toggled. If Jumper LK_ON is inserted, S1 is connected to the
ON (ON-CLR) pin. Remove this jumper to connect an external
signal to the pin using the J4 pin connect block. Note there is
also a 2-pin input connector (J1) located near the S1 switch,
which also allows the user to connect an ON (ON-CLR) signal
to the device without removing the jumper. The green LED
(D1) is used to indicate the status of the pin.
SOFT START CAPACITORS BLOCK
The ADM1170 and ADM1171 have a soft start function to
limit the inrush current by controlling the rate at which the gate
ramps up. This is achieved by slowly increasing the ILIMIT voltage
from 0 mV to 50 mV via a current of 10 μA being injected into
the soft start capacitor. When the voltage reached 1 V on the SS
pin then the ILIMIT is at its normal operation of 50 mV. This pin
can also be accessed by the J4 block connector where it can be
used to reduce the fault limit on the device by overdriving or
clamping the voltage. The ADM1170 limits current when
50 mV is reached across the SENSE+ and SENSE− pins (VCC
and SENSE pins for ADM1171 and the ADM1172). There
are three capacitors connectable via dipswitches (S2_S) on the
board and another empty footprint for any additional
capacitors. A capacitor is chosen as follows:
t = V × C/I
where:
t is the time required to reach a normal 50 mV limit.
V is 1 V.
C is a capacitor.
I is 10 μA.
Thus, C = t × 10 × 10−6. Table 5 shows the available options.
TIMER BLOCK
The ADM1170, ADM1171, and ADM1172 are available in both
autoretry and latched-off versions, ADM1170-1, ADM1171-1,
ADM1172-1 and ADM1170-2, ADM1171-2, and ADM1172-2,
respectively. The TIMER capacitor is used to control both the
startup timing cycle and the circuit breaker delay. The timing
delays are calculated by the following equations:
tINITIAL = 1.3 V × CTIMER/5 μA
tCB = 1.3 V × CTIMER/60 μA
Table 6 shows the available dip switch (S1_TIMER) options.
SENSE RESISTOR AND FET
There is a 33 mΩ sense resistor fitted as standard and a typical
FET, details of both are found in the Bill of Materials. However,
footprints are supplied to easily change the FET and sense
resistor to the many different common footprints that may
be required.
CURRENT SENSE OUTPUT (CSO)
For the ADM1171, the CSOUT pin can be monitored through
the block connector J4, pin labeled PIN6.
PFI/PFO BLOCK
The ADM1172 has an integrated comparator and reference
allowing the user to monitor the voltage for power-fail conditions. Jumper LK_PFI allows the user to select between input
or output voltage monitoring. The threshold can be set using
Potentiometer VR1. Jumper PFI_IN is used to isolate the output
of VR1 from the PFI pin of the ADM1172. This may be required
when another voltage needs to be monitored or an external
resistor divider is used. The PFO LED shows the status of the
PFO output.
LEDS
A green LED located near the VIN and VOUT connectors is
used to indicate if power is present. Switch S1 also has a green
LED located nearby to indicate the status of the ON (ON-CLR)
pin. These LEDs are powered from a LED driver circuit, which
ensures a constant level of brightness across the various supply
voltage ranges.
PIN ACCESS
Pin access is available through a connector block (J4) on the left
edge of the board.
ADDITIONAL COMPONENTS
Additional components can be placed in the center of the
board where holes have been placed (see the outlined section
in the center of the board in Figure 1). Access to all pins is available
through the top row. There is also such an area at the right edge
of the board to allow loads to be soldered to the board.
Rev. 0 | Page 6 of 12
EVAL-ADM1170/ADM1171/ADM1172
EVALUATION BOARD SCHEMATIC
(
)
07418-002
Figure 2. Board Schematic
Rev. 0 | Page 7 of 12
EVAL-ADM1170/ADM1171/ADM1172
ORDERING INFORMATION
BILL OF MATERIALS
Table 7.
Qty
1
1
1
1
6
1
1
2
1
1
1
1
3
1
1
Reference Designator
C1
C2
C5
C6
CL1, CL2, CL3, CL4, CL5, CL6
CS1
CS2
CS3, CT2
CS4
CT1
CT3
CT4
D1, D4, D5
D2
D3
1
4
1
1
3
J1
J1_VIN, J3_GND, J4_GND, J5_VOUT
J4
L1
LK_ON, PFI_IN, LK_VCC
1
LK_PFI
4
1
1
1
4
1
1
1
2
1
1
2
Q1, Q3, Q5, Q6
Q2
Q4
R1
R8, R9, R10, R11
R2
R6
R17
R22, R23
RS1
S1
S1_TIMER, S2_S
15
T1, T2, T3, T4, T5, T6, T7, T8, T9,
T10, T14, T15, T16, T_GND, T_VIN
VR1
U1
U2
U3
U6
1
1
1
1
1
Description
0.1 μF capacitor, 0805 100 nF 50 V
Not placed
10 μF capacitor, Case B 10 μF 20 V
10 μF capacitor, Case A 10 μF 6.3 V
0Ω
1 nF capacitor, 0805 50 V
10 nF capacitor, 0805 50 V
47 nF capacitor, 0805 50 V
Not placed
22 nF capacitor, 0805 50 V
470 nF capacitor, 1206, 25 V
Not placed
LED, SMD green
LED, SMD red
Custom generic Zener-diode add-in if
operated with a high noise supply
Terminal block, PCB 2-way
Socket, 4 mm PCB red
Terminal block, PCB 3-way
100 μH inductor, 1210
Header, 1 row 2-way
Jumper socket, red
Header, 1 row 3-way
Jumper socket, red
MOSFET, N-channel SOT-23
MOSFET, N-channel D-PAK
Transistor, NPN SOT-23
22 Ω resistor, 0805
10 kΩ resistor, 0805
1 kΩ resistor, 0805
100 kΩ resistor, 0805
100 Ω resistor, 0805
0 Ω resistor, 0805
0.033 Ω resistor, 1206
Switch, slide SP 2 POS VERT
Switch, DIP 4-way
Manufacturer
Multicomp
Manufacturer
Number
U0805R104KCT
AVX
AVX
TAJB106K020R
TAJA106K006R
Multicomp
Multicomp
Multicomp
U0805R102KCT
U0805R103KCT
U0805R473KCT
Multicomp
Multicomp
U0805R223KCT
T1206R474KCT
Kingbright Corp.
Kingbright Corp.
KP-2012SGC
KP-2012SRC-PRV
Generic Zener diode
Lumberg Automation
Deltron, LLC.
Lumberg Automation
Murata Electronics
Harwin
KRM 02
571-0500-01
KRM 03
LQH32MN101J23L
M20-9990246
M7566-05
M20-9990346
M7566-05
NDS355AN
IRFR3518PBF
FMMT617
MC 0.1W 0805 1% 22R
MC 0.1W 0805 1% 10k
MC 0.1W 0805 1% 1K
MC 0.1W 0805 1% 100K
MC 0.1W 0805 1% 100R
MC 0.1W 0805 0R
TL2BR033FTE
STSSS9121
GDH04S
Harwin
Terminal, PCB black PK100
Fairchild Semiconductor
International Rectifier
Zetex, Inc.
Multicomp
Multicomp
Multicomp
Multicomp
Multicomp
Multicomp
Tyco Electronics
ALPS ELECTRIC CO., LTD.
Tyco Electronics/
Alcoswitch
Vero Technologies
20-2137
Trimmer, 10 kΩ
ADM1170/ADM1171/ADM1172
IC, SM LED driver
SOT-23, 8-pin socket
IC, SM 1.5 A LDO regulator
Vishay Spectrol
Analog Devices
Zetex, Inc.
Loranger Intl
National Semiconductor
63M-T607-103
ADM117x
ZXSC300E5TA
04334 081 6215
LM1086CS-ADJ
Rev. 0 | Page 8 of 12
EVAL-ADM1170/ADM1171/ADM1172
ORDERING GUIDE
Model
EVAL-ADM1170EBZ1
EVAL-ADM1171EBZ1
EVAL-ADM1172EBZ1
1
ESD CAUTION
Description
ADM1170 Evaluation Board
ADM1171 Evaluation Board
ADM1172 Evaluation Board
Z = RoHS Compliant Part.
Rev. 0 | Page 9 of 12
EVAL-ADM1170/ADM1171/ADM1172
NOTES
Rev. 0 | Page 10 of 12
EVAL-ADM1170/ADM1171/ADM1172
NOTES
Rev. 0 | Page 11 of 12
EVAL-ADM1170/ADM1171/ADM1172
NOTES
©2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
EB07418-0-6/08(0)
Rev. 0 | Page 12 of 12
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