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MAX17612B Evaluation Kit
Evaluates: MAX17612B
4.5V to 60V, 250mA, Current-Limiter
with OV, UV Protection
Quick Start
Recommended Equipment
●
MAX17612B EV kit
●
Multimeters
● Adjustable load (0A–1A)
●
USB-A male to USB-B male cable or 5V DC power
supply
●
60V DC power supply
General Description
The MAX17612B evaluation kit (EV kit) is a fully assem-
bled and tested circuit board that demonstrates the
MAX17612B 4.5V to 60V, 250mA, current-limiter with OV,
UV protection in a 10-pin TDFN-EP package. The EV kit
can be configured to demonstrate adjustable overvoltage,
undervoltage, different current-limit types, and different
current-limit thresholds.
Features
●
4.5V to 60V Operating-Voltage Range
●
Features a TVS Diode across the Input and Schottky
Diode across the Output Terminals
●
Evaluates UVLO, OVLO, Three Current-Limit Types,
and Current-Limit Threshold
●
UVLO programmed to 4.5V
●
OVLO programmed to 36V
●
Jumper-Configurable Current-Limit
(Selected as 250mA by Default)
●
Current-Limit Mode Set To Autoretry by default
●
Proven PCB Layout
●
Fully Assembled and Tested
Ordering Information
appears at end of data sheet.
Equipment Setup and Test Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1)
2)
3)
4)
5)
Verify that all jumpers are in their default positions.
Connect the USB cable to J1 from a computer or
connect a 5V-DC power supply to TP3.
Verify that LED1 is on.
Set the 60V DC power supply to 5V and connect to
IN (J2/TP6). Verify that OUT (J3/TP8) is 5V.
Gradually increase the DC power-supply voltage and
verify that OUT voltage goes down and
UVOV
goes
low when input reaches approximately 36V.
Gradually decrease the DC power-supply voltage
and verify that OUT comes back and
UVOV
goes
high when the input reaches approximately 34.8V.
Set the DC power-supply voltage to 24V and
connect the adjustable load between OUT and GND
terminals and a multimeter in series to measure the
current. Gradually increase the load current and
verify that the OUT goes down and
FLAG
goes low
when the load current increases above 250mA.
The jumper JU1 can be configured to change the
current limit as given in
Table 2.
Verify various
current limit operations by repeating step 7.
6)
7)
8)
CAUTION:
When applying a negative input to V
IN
, the
negative input test should be performed when the output
capacitors are fully discharged and V
BUS
is not supplied.
319-100252; Rev 0; 9/18
MAX17612B Evaluation Kit
Evaluates: MAX17612B
4.5V to 60V, 250mA, Current-Limiter
with OV, UV Protection
UVLO/OVLO Threshold
The UVLO threshold for input voltage is set through the
R9, R10 resistive divider. Use the following equation to
calculate the value of R10 for a required undervoltage
threshold level:
R10
=
R9
V
UVLO
−
1
V
REF
Detailed Description
The EV kit circuit can be configured to evaluate user-
defined UVLO and OVLO thresholds using resistor-divid-
ers. The overcurrent threshold is determined by external
resistors connected to the SETI pin and is jumper-config-
urable through jumper JU1. Using jumper JU4, the EV kit
circuit can be configured to evaluate different current limit
types (Autoretry, Continuous, and Latch-off). LED1 on the
EV kit indicates availability of logic power for annunciation
signals (UVOV and
FLAG)
and EN.
The EV kit provides on-board output capacitors to enable
a demonstration of the MAX17612B protection features.
Input-Power Supply
where R9 can be chosen as 2.2MΩ, V
REF
is 1.5V, and
V
UVLO
is the required undervoltage protection threshold.
The OVLO threshold for input voltage is set through the
R11, R12 resistive divider. Use the following equation
to calculate the value of R12 for a required overvoltage
threshold level:
R12
=
R11
V
OVLO
−
1
V
REF
The EV kit is powered by a user-supplied 4.5V to
60V power supply connected between J2/TP6 (INPUT
POWER) and GND.
Enable
To enable the device, connect a USB-A male connector
from the computer to the USB-B female connector, J1, or
an external 5V supply to TP3 and GND. This provides 5V
to V
BUS
and to the EN pin (JU5 connects V
BUS
to EN
by default). Choose the JU5 setting to enable or disable
operation of the MAX17612B (see
Table 1).
where R11 can be chosen as 2.2MΩ, V
REF
is 1.5V, and
V
OVLO
is the required overvoltage protection threshold.
Current-Limit Threshold
The EV kit features a jumper (JU1) to select the current-
limit threshold. Install a jumper as shown in
Table 2
to
change the current-limit threshold.
Table 1. Enable (JU5)
JUMPER
JU5
*Default
position.
SHUNT POSITION
1-2*
2-3
Open
DESCRIPTION
EN pin connected to V
BUS
EN pin connected to GND
EN pin floating
MAX17612B STATUS
ON
OFF
ON
Table 2. Current-Limit Threshold (JU1)
JUMPER
SHUNT POSITION
1-2
JU1
3-4
5-6*
7-8
*Default
position.
DESCRIPTION
Current limit 10mA
Current limit 100mA
Current limit 250mA
Current limit adjustable
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Maxim Integrated
│
2
MAX17612B Evaluation Kit
Evaluates: MAX17612B
4.5V to 60V, 250mA, Current-Limiter
with OV, UV Protection
Output-Load Capacitor
Use JU6 to connect the OUT pins to the OUT test point
(TP8). Use jumper JU7 to connect output to 330µF capac-
itors. See
Table 4
for jumper settings
Current-Limit Type Select
The EV kit features jumper JU4 to select different current-
limit responses. See
Table 3
for jumper settings.
Table 3. Current-Limit Type Select (JU4)
JUMPER
JU4
*Default
position.
SHUNT POSITION
1-2
2-3
Open*
DESCRIPTION
Latch-off
Continuous
Autoretry
Table 4. Output Load Capacitor (JU7)
JUMPER
JU7
*Default
position.
SHUNT POSITION
Installed
Not installed*
DESCRIPTION
OUT connected to C4 and C5.
OUT not connected to C4 and C5.
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Maxim Integrated
│
3
MAX17612B Evaluation Kit
Evaluates: MAX17612B
4.5V to 60V, 250mA, Current-Limiter
with OV, UV Protection
MAX17612B EV Kit Performance Report
(V
IN
= 24V, C
IN
= 0.47μF, C
OUT
= 4.7μF, unless otherwise noted.)
POWER-UP RESPONSE
WITH 330µF CAPACITOR AT NO LOAD
toc01
OUTPUT SHORT-CIRCUIT RESPONSE
toc02
CURRENT-LIMIT RESPONSE
toc03
V
IN
V
OUT
V
IN
20V/div
I
LIM
= 0.25A
20V/div
20V/div
20V/div
V
OUT
V
IN
V
OUT
20V/div
20V/div
V
UVOV
I
LIM
= 0.25A
5V/div
V
FLAG
5V/div
V
FLAG
5V/div
I
LIM
= 0.25A,
I
L
= 0mA TO SHORT ON OUT WITH 1A/s
200mA/div
I
OUT
200mA/div
10ms/div
I
OUT
200mA/div
I
OUT
10ms/div
100ms/div
AUTORETRY CURRENT-LIMIT RESPONSE
toc04
CONTINUOUS CURRENT-LIMIT RESPONSE
toc05
V
IN
V
OUT
I
LIM
= 0.25A
20V/div
20V/div
V
IN
V
OUT
I
LIM
= 0.25A
20V/div
20V/div
V
FLAG
5V/div
V
FLAG
5V/div
I
OUT
200mA/div
I
OUT
200mA/div
200ms/div
200ms/div
LATCH-OFF CURRENT-LIMIT RESPONSE
toc06
OVERVOLTAGE FAULT RESPONSE
toc07
48V
V
IN
V
OUT
I
LIM
= 0.25A
20V/div
20V/div
V
IN
24V
R
LOAD
= 240Ω
C
OUT
= 4.7µF
V
OUT
20v/div
20V/div
V
FLAG
5V/div
I
OUT
V
UVOV
200mA/div
1ms/div
5V/div
200ms/div
www.maximintegrated.com
Maxim Integrated
│
4
MAX17612B Evaluation Kit
Evaluates: MAX17612B
4.5V to 60V, 250mA, Current-Limiter
with OV, UV Protection
WEBSITE
www.bourns.com
www.fciconnect.com
www.murata.com
www.panasonic.com
www.kemet.com
www.diodes.com
www.degson.com
www.sullinscorp.com
www.molex.com
www.kingbrightusa.com
www.keyelco.com
Component Suppliers
SUPPLIER
Bourns, Inc.
FCI Electronics Interconnection Solutions
Murata Americas
Panasonic Corp.
Kemet Electronics Components
Diodes Incorporated
Degson Electronics
SullinsCorp Connector Solutions
Molex Electronic Solutions
Kingbright USA
Keystone Electronics Corp
Note:
Indicate that you are using the MAX17612B when contacting these component suppliers.
Ordering Information
PART
MAX17612BEVKIT#
TYPE
EV Kit
www.maximintegrated.com
Maxim Integrated
│
5
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