Analog Devices MAX17614 User manual

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MAX17614 Evaluation Kit
Evaluates: MAX17614 in Ideal
Diode/Power Source Selector
Applications
319-101000; Rev 0; 6/23
© 2023 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.
General Description
The MAX17614 evaluation kit (EV kit) is a fully
assembled and tested circuit board that demonstrates
the MAX17614 ideal diode/power source selector in a
20-pin TQFN-EP package. The EV kit allows two power
sources to be connected as inputs. The load gets power
from the higher voltage power source for ideal diode
applications. For power source selector applications, the
load gets power from either of the two power sources by
driving respective EN pins. The EV kit configurations
allow independent settings for the two instances to
demonstrate adjustable overvoltage, undervoltage,
reverse current blocking, three current-limit types
(autoretry, continuous, and latch-off) with different
programmable current-limit thresholds (from 0.15A to
3A). For more details about the IC benefits and features,
refer to the MAX17614 IC data sheet.
Features
•4.5V to 40V Operating Input Voltage Range
(Remove the TVS Diodes D101, D201, and Open
Jumpers JU101, JU201 to Extend the Operating
Range up to 60V)
•40V TVS Diodes (D101 and D201) across the Input
Terminals
•Schottky Diode (D103) across the Output Terminals
•Evaluates Undervoltage Lockout (UVLO1, UVLO2),
Overvoltage Lockout (OVLO1, OVLO2), Three
Current-Limit Types, and Current-Limit Thresholds
•UVLO Programmed to 4.5V for Both Input Voltages
•OVLO Programmed to 40.2V for Both Input
Voltages
•Internally Pulled-Up Active High Enable Inputs
•Jumper-Configurable Current Limits (Selected as
0.3A by Default)
•Jumper-Configurable (JU102, JU202) Current-Limit
Types (Selected as Autoretry by Default)
•Programmable Startup Blanking Times (C103,
C203)
•Fault Indication Signals (UVOV1, UVOV2, FLAG1,
FLAG2)
•Proven PCB Layout
•Fully Assembled and Tested
Ordering Information appears at end of data sheet.

Evaluates: MAX17614 in Ideal
Diode/Power Source Selector
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Quick Start
Configuration Diagram
MAX17614
EV KIT
LOAD
GND
VIN1
A
A
GND
VIN2
(VIN1)
DC
POWER
SUPPLY
(VIN2)
DC
POWER
SUPPLY
GND
VOUT A
V
5V
GND
5V DC
POWER
SUPPLY/
USB POWER
SUPPLY
J101 J102
J201
J103
Figure 1.MAX17614 EV Kit Setup Diagram
Required Equipment
•MAX17614 EV kit
•Two 60V, 4A DC power supplies
•Multimeters
•Adjustable load (0A to 3.5A)
•USB power source or 5V DC power supply
Equipment Setup and Test Procedure
A typical bench setup for MAX17614 EV Kit is shown in Figure 1.
The EV kit is fully assembled and tested. Follow the steps to verify board operation.
Caution: Do not turn on power supply until all connections are completed.
1. Connect the USB cable to J103 from a USB power source or connect a 5V DC power supply to 5V test point.
2. Verify that LED1 glows.
3. Verify that the JU105 and JU205 jumpers are installed.
4. Verify that all jumpers are in their default positions.
5. Set the first 60V DC power supply (VIN1) to 5V and connect to VIN1 (J101). Verify that VOUT (J102) is 5V.
6. Connect a 200Ω resistive load across VOUT and GND terminals.
Follow the steps (7-10) to test OVLO operation.
7. Gradually increase VIN1 and monitor VOUT voltage (J102). Verify that VOUT voltage (J102) increases as VIN1
increases and goes down when the input voltage reaches approximately 40.2V. Also check that UVOV1 status
changes from 0V to 5V.

Evaluates: MAX17614 in Ideal
Diode/Power Source Selector
Applications
MAX17614 Evaluation Kit
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8. Gradually decrease VIN1 and verify that VOUT voltage (J102) is restored back when the input voltage reaches
approximately 38.8V. Also check that UVOV1 status changes from 5V to 0V.
9. Reduce VIN1 to zero volts and verify that the output voltage goes down to zero volts.
10. Set the second 60V DC power supply (VIN2) to 5V and connect to VIN2 (J201). Verify that VOUT (J102) is 5V.
Repeat the steps 7-8 and verify the device U2 performance for OVLO operation.
Follow the steps (11-14) to test current-limit operation.
11. Set VIN1 to 24V and connect the adjustable load between VOUT and GND terminals and a multimeter in series
to measure the current. Gradually increase the load current and verify that VOUT (J102) goes down when the
load current increases above 0.3A. Also check that FLAG1 status changes from 5V to 0V.
12. Jumper JU103 can be configured to change the current limit as shown in Table 3. Verify various current-limit
settings by repeating Step 11.
13. Reduce VIN1 to zero volts and verify that the output voltage goes down to zero volts.
14. Set the second 60V DC power supply (VIN2) to 24V and connect to IN2 (J201). Verify that VOUT (J102) is 24V.
Repeat the steps 11-12 and verify the device U2 performance for different current-limit settings.
Follow the steps (15-20) to test ideal diode application.
15. Configure the jumpers JU103 and JU203 to current-limit setting = 3A as shown in Table 3 and connect 2.7A load
between VOUT and GND terminals.
16. Set VIN2 to 20V and connect to VIN2 (J201). Verify that VOUT (J102) is 20V.
17. Set VIN1 to 24V and connect to VIN1 (J101) to observe seamless switchover of VOUT voltage (J102) from VIN2
= 20V to VIN1 = 24V.
18. Observe that device U1 enters forward conduction state by verifying FLAG1 status change from 0V to 5V and
device U2 enters reverse blocking state by verifying FLAG2 status change from 5V to 0V.
19. Set the first DC power supply (VIN1) to 18V and observe seamless switchover of VOUT voltage (J102) from
VIN1 to 20V.
20. Observe that device U1 enters reverse blocking state by verifying FLAG1 status change from 5V to 0V and device
U2 enters forward conduction state by verifying FLAG2 status change from 0V to 5V.
Follow the steps (21-26) to test power source selector application.
21. Configure the jumpers JU103 and JU203 to current-limit setting = 3A as shown in Table 3 and connect 2.7A load
between VOUT and GND terminals.
22. Set VIN1 to 24V and connect to VIN1 (J101). Verify that VOUT (J102) is 24V. Verify that the load is supported
from VIN1.
23. Set VIN2 to 20V and connect to VIN2 (J201). Verify that VOUT (J102) is still 24V and the load is supported from
VIN1.
24. Set JU104, JU204 open and drive EN1 low with a waveform generator. Verify that VOUT (J102) switchover to
VIN2 (= 20V) and IIN1 is 0A, the load is supported from VIN2.
25. Drive EN1 high with a waveform generator. Verify that VOUT (J102) switchover to VIN1 (= 24V) and IIN2 = 0A,
the load is supported from VIN1.
26. To select/deselect the second power supply (VIN2), drive EN2 high and low with a waveform generator. Repeat
steps 21-25 to demonstrate power source selector application using EN2.
Detailed Description of Hardware
The conventional redundant power architecture solution to support a critical load is to OR two power sources using
Schottky diodes. In this scheme, if one of the power sources were to fail, switchover to the other source occurs smoothly
without interruption of power to the load. However, the Schottky-based solution suffers from power loss and higher
temperature rise while also requiring a large number of discrete components for implementation of other important
protection features such as current limit, UVLO, and OVLO.

Evaluates: MAX17614 in Ideal
Diode/Power Source Selector
Applications
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The MAX17614 device with internal back-to-back nFETs provides a highly integrated, efficient, and reliable ideal diode
solution for fast and seamless switchover response while delivering significant reduction in component count and design
complexity. The MAX17614 EV kit circuit can be configured to evaluate the MAX17614 performance for ideal diode
applications and power source selector applications during selection of input supply voltages by driving respective EN
signals (EN1 and EN2).
The MAX17614 EV kit circuit can be configured to evaluate user-defined UVLO and OVLO thresholds using respective
resistor-dividers. The current-limit threshold is determined by external resistors connected to the SETI pin and is
configurable through jumpers JU103 and JU203. Using jumpers JU102 and JU202, the EV kit circuit can be configured
to evaluate autoretry, continuous, and latch-off current-limit modes. LED1 on the EV kit indicates availability of logic power
for fault indication signals (UVOV1, UVOV2, FLAG1, and FLAG2). The MAX17614 offers a programmable startup blanking
time that enables charging of large capacitances on the output during startup and when recovering from a fault condition.
Connecting a capacitor (C103, C203) from the TSTART pin (TSTART1 and TSTART2) to GND programs the startup
blanking time. The EV kit provides on-board output capacitors (C107, C108) to enable a demonstration of the MAX17614
protection features while charging large capacitors. The capacitors (C107, C108) can be disconnected using Jumper
JU106. For more details about the IC benefits and features, refer to the MAX17614 IC data sheet.
Input Power Supply
The EV kit is powered by two user-supplied 4.5V to 60V power supplies connected between input connector (J101 and
J201) terminals. The EV kit features 40V rating TVS diodes at input terminals to support high input surge applications. To
extend the operating input voltage up to 60V, remove TVS diode and adjust OVLO resistor configuration accordingly with
reference to Undervoltage Lockout/Overvoltage Lockout (UVLO/OVLO) Programming section.
Ideal Diode Application
The EV kit features jumpers (JU105 and JU205) to connect the OUT pins of devices U1 and U2 to VOUT (J102) (see
Table 1). For more details about the MAX17614 timing parameters for ideal diode applications, refer to the MAX17614 IC
data sheet.
Table 1. Output Jumper (JU105, JU205) Settings
JU105 SHUNT
POSITION
JU205 SHUNT
POSITION
DESCRIPTION
Installed*
Installed*
Ideal diode application: Both OUT1 and OUT2 are connected to VOUT (J102)
Installed
Not Installed
Only OUT1 is connected to VOUT (J102)
Not Installed
Installed
Only OUT2 is connected to VOUT (J102)
Not Installed
Not Installed
Both OUT1 and OUT2 are not connected to VOUT (J102)
*Default Position
Power Source Selector
The EN pin of the MAX17614 allows a system microcontroller to turn ON/OFF power to the load, thus enabling the system
to select a power source based on operating conditions. Configure shunt position not installed for jumpers JU104 and
JU204 and drive the EN pins of devices U1 and U2 high or low for selection of input supply voltages.
Choose the jumpers (JU104 and JU204) settings to enable or disable operation of the MAX17614 (see Table 2).
Table 2. EN (JU104, JU204) Settings
SHUNT POSITION
DESCRIPTION
Not Installed*
EN1/EN2 pin unconnected
1-2
EN1/EN2 is connected to GND
*Default Position
Setting the Current-Limit Threshold (SETI)
The EV kit features jumpers (JU103 and JU203) to select the current-limit threshold. Install jumpers as shown in Table 3
to change the current-limit threshold. The current limit can be programmed between 0.15A to 3A. The current limit (ILIM)
is programmed by the resistor RSETI connected at the SETI pin. Use the following equation to calculate the current-limit
setting resistor:
 


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Diode/Power Source Selector
Applications
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where ILIM is the desired current limit in mA and RSETI is in kΩ.
Do not use RSETI lower than 1.5kΩ.
Table 3. Current-Limit Threshold Jumper (JU103, JU203) Settings
SHUNT POSITION
CURRENT-LIMIT THRESHOLD
1-2
Adjustable using the resistor pot (R107, R207)
3-4*
0.3A
5-6
1.5A
7-8
3A
*Default Position
Current Monitoring
The MAX17614 features read out of the current flowing from IN-to-OUT. The current from IN-to-OUT is mirrored with a
ratio of 3032 (CIRATIO) and flows out through the SETI pin, into the external current-limit resistor. The voltage on the SETI
pin provides information about IN current with the following relationship:
 

where IIN-OUT is current from IN-to-OUT in A
VSETI is SETI pin voltage in V
and RSETI is in kΩ
Current-Limit Type Selection (CLMODE)
The EV kit features jumpers (JU102 and JU202) to select different current-limit type responses (see Table 4). For more
details about each current-limit type, refer to the MAX17614 IC data sheet.
Table 4. Current-Limit Type Selection (JU102, JU202)
SHUNT POSITION
CURRENT-LIMIT TYPE
1-2
Latch-off
2-3
Continuous
Not Installed*
Autoretry
*Default Position
Undervoltage Lockout/Overvoltage Lockout (UVLO/OVLO) Programming
The UVLO threshold for input voltage is set through the R101, R102 resistive divider for U1 and R201, R202 resistive
divider for U2, respectively. Use the following equations to calculate the value of R102 and R202 to adjust falling input
UVLO threshold. The recommended value of R101 and R201 is 2.2MΩ.
  

 
  

 
where VUVF = 1.45V (typ)
VIN1_UVF = Required falling input undervoltage threshold for U1
VIN2_UVF = Required falling input undervoltage threshold for U2
The OVLO threshold for input voltage is set through the R103, R104 resistive divider for U1 and R203, R204 resistive
divider for U2, respectively. Use the following equation to calculate the value of R104 and R204 to adjust rising input
OVLO threshold. The recommended value of R103 and R203 is 450kΩ to 500kΩ.
  

 

Evaluates: MAX17614 in Ideal
Diode/Power Source Selector
Applications
MAX17614 Evaluation Kit
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  

 
where VOVR = 1.5V (typ)
VIN1_OVR = Required rising input overvoltage threshold for U1
VIN2_OVR = Required rising input overvoltage threshold for U2
Startup Blanking Time (TSTART) Programming
Connecting a capacitor from the TSTART1/TSTART2 pin to GND programs the startup blanking time. In order to program
tTSTART1/tTSTART2, the capacitor C103/C203 connected to the TSTART1/TSTART2 pin is charged with a constant current
of 5μA (typ). When the voltage on the capacitor (C103/C203) reaches 1.5V, tTSTART1/tTSTART2 is considered expired and
C103/C203 is discharged to ground.
  
 
  
 
For more details about startup requirements, refer to the MAX17614 IC data sheet.
Output Load Capacitor
Configure Jumper JU106 to connect output to 470µF capacitors (see Table 5).
Table 5. Output Load Capacitor (JU106) Settings
SHUNT POSITION
DESCRIPTION
Installed
C107 and C108 connected to OUT
Not Installed*
C107 and C108 not connected to OUT
*Default Position

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Applications
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MAX17614 EV Kit Typical Operating Characteristics
(CIN1 = CIN2 = 1µF, COUT = 4.7µF, VIN1 = 24V, VIN2 = 20V, VBUS = 5V, ILIMIT1 = ILIMIT2 = 3A, CLMODE1 = CLMODE2 = Autoretry,
VIN1_OVR = VIN2_OVR = 40.2V, TA= +25°C, unless otherwise noted. IIC1, IIC2 measured using JU105, JU205, respectively)

Evaluates: MAX17614 in Ideal
Diode/Power Source Selector
Applications
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(CIN1 = CIN2 = 1µF, COUT = 4.7µF, VIN1 = 24V, VIN2 = 20V, VBUS = 5V, ILIMIT1 = ILIMIT2 = 3A, CLMODE1 = CLMODE2 = Autoretry,
VIN1_OVR = VIN2_OVR = 40.2V, TA= +25°C, unless otherwise noted. IIC1, IIC2 measured using JU105, JU205, respectively)
Component Suppliers
SUPPLIER
WEBSITE
Murata Americas
www.murata.com
Vishay
www.vishay.com
Panasonic
www.panasonic.com
Taiyo Yuden
www.taiyoyuden.com
Diodes Incorporated
www.diodes.com
Bourns, Inc.
www.bourns.com
Note: Indicate that you are using MAX17614 when contacting these component suppliers.

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Diode/Power Source Selector
Applications
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MAX17614 EV Kit Bill of Materials
S.NO
PART REFERENCE
QTY
DESCRIPTION
MANUFACTURER PART NUMBER
1
C1
1
1µF 10% 25V X7R ceramic capacitor (0603)
TAIYO YUDEN TMK107B7105KA
2
C102, C202
2
1µF 10% 100V X7R ceramic capacitor
(1206)
TAIYO YUDEN HMK316B7105KLH
3
C104
1
4.7µF 10% 100V X7R ceramic capacitor
(1206)
MURATA GRM31CZ72A475KE11
4
C107, C108
2
470µF 20% 63V aluminum (8mm)
PANASONIC EEU-FR1J471
5
D1
1
Power Schottky Diode, 60V, 1A (SMA)
DIODES INCORPORATED B160-13-F
6
D101, D201
2
TVS Diode, 40V, 600W (SMB)
BOURNS SMBJ40CA
7
D103
1
Power Schottky Diode, 100V, 2A
(POWERDI-123)
DIODES INCORPORATED DFLS2100
8
LED1
1
Green LED (1206)
LUMEX OPTOCOMPONENTS INC
SML-LX1206GC-TR
9
R1
1
SMT Resistor 1kΩ 1% (0805) 0.125W
VISHAY DALE CRCW08051K00FK
10
R101, R201
2
SMT Resistor 2.2MΩ 1% (0603) 0.1W
VISHAY DALE CRCW06032M20FK
11
R102, R202
2
SMT Resistor 1.1MΩ 1% (0603) 0.1W
VISHAY CRCW06031M10FK
12
R103, R203
2
SMT Resistor 470kΩ 1% (0603) 0.1W
VISHAY DALE CRCW0603470KFK
13
R104, R204
2
SMT Resistor 18.2kΩ 1% (0603) 0.1W
PANASONIC ERJ-3EKF1822
14
R105, R113, R205,
R213
4
SMT Resistor 4.99kΩ 1% (0402) 0.063W
VISHAY DALE CRCW04024K99FK
15
R106, R206
2
SMT Resistor 150kΩ 1% (0402) 0.063W
VISHAY DALE CRCW0402150KFK
16
R107, R207
2
Through-Hole Radial Trimmer Potentiometer
50kΩ 10% 0.5W
BOURNS 3296W-1-503LF
17
R108, R111, R208,
R211
4
SMT Resistor 1.5kΩ 1% (0402) 0.063W
VISHAY DALE CRCW04021K50FK
18
R109, R209
2
SMT Resistor 15kΩ 1% (0402), 0.063W
VISHAY DALE CRCW040215K0FK
19
R110, R210
2
SMT Resistor 3kΩ 1% (0402) 0.063W
VISHAY DALE CRCW04023K00FK
20
R112, R212
2
SMT Resistor 20kΩ 1% (0402) 0.063W
VISHAY DALE CRCW040220K0FK
21
R114, R115, R214,
R215
4
SMT Resistor 10kΩ 1% (0402) 0.063W
VISHAY DALE CRCW040210K0FK
22
U1, U2
2
4.5V to 60V, 3A, Ideal Diode/Power Path
Selector with Current Limit, UV, OV
Protection (20-pin TQFN-EP, 4mm x 4mm)
ADI MAX17614ATP+
23
5V
1
Red Test Point 0.040" (1.02mm) Hole
Diameter
KEYSTONE 5000
24
EN1, EN2, UVLO1,
UVLO2
4
White Test Point 0.063" (1.60mm) Hole
Diameter
KEYSTONE 5012
25
FLAG1, FLAG2,
OVLO1, OVLO2,
SETI1, SETI2,
TSTART1, TSTART2,
UVOV1, UVOV2
10
White Test Point 0.040" (1.02mm) Hole
Diameter
KEYSTONE 5002
26
GND, GND1, GND3
3
Black Test Point 0.063" (1.60mm) Hole
Diameter
KEYSTONE 5011
27
GND2, GND4
2
Black Test Point 0.040" (1.02mm) Hole
Diameter
KEYSTONE 5001
28
OUT1, OUT2, VIN1,
VIN2, VOUT
5
Red Test Point 0.063" (1.60mm) Hole
Diameter
KEYSTONE 5010

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S.NO
PART REFERENCE
QTY
DESCRIPTION
MANUFACTURER PART NUMBER
29
SU1-SU11
11
Shunt Connector, Black Closed Top
SULLINS ELECTRONICS CORP.
STC02SYAN
30
J101, J102, J201
3
2-Pin Green PC Terminal Block
TE CONNECTIVITY 282837-2
31
J103
1
USB B connector
FCI CONNECT 61729-0010BLF
32
JU101, JU104, JU105,
JU106, JU201, JU204,
JU205
5
2-Pin Single-Row Header
SULLINS ELECTRONICS CORP.
GCC02SAAN
33
JU102, JU202
4
3-Pin Single-Row Header
SULLINS ELECTRONICS CORP.
GBC03SAAN
34
JU103, JU203
2
2x4 Dual-Row Header
SULLINS ELECTRONICS CORP.
GBC04DAAN
35
C101, C201
2
PACKOUT: Aluminum-Electrolytic Capacitor
PANASONIC EEE-FK1K4R7P
36
C103, C203
0
OPEN: Ceramic Capacitor (0603)
-
37
C105, C106
2
PACKOUT: Ceramic Capacitor (1206)
MURATA GRM31CZ72A475KE11
38
D102, D202
2
PACKOUT: 40V, 600W, TVS (SMB)
BOURNS SMBJ40CA
39
PCB
1
PCB: MAX17614 Evaluation Kit
-
DEFAULT JUMPER TABLE
JUMPER
SHUNT POSITION
JU103
(3:4)
JU105
(1:2)
JU203
(3:4)
JU205
(1:2)

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MAX17614 EV Kit Schematics

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MAX17614 EV Kit PCB Layout
MAX17614 EV Kit PCB Layout—Top Silkscreen
MAX17614 EV Kit PCB Layout—Top Layer
MAX17614 EV Kit PCB Layout—Layer 2
MAX17614 EV Kit PCB Layout—Layer 3

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MAX17614 EV Kit PCB Layout (Continued)
MAX17614 EV Kit PCB Layout—Bottom Layer
MAX17614 EV Kit PCB Layout—Bottom
Silkscreen
Ordering Information
PART
TYPE
MAX17614EVKIT#
EV Kit
#Denotes RoHS compliance.

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Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
0
6/23
Initial release
—
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. Specifications subject to change without notice. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their
respective owners.
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