ANALOG DEVICES MAX17526A Evaluation Kit
Specifications
- Input Voltage Range: 5.5V to 60V
- Package: 20-pin TQFN-EP
- Features: OV, UV, Reverse Protection, Power Limit
- External Components: TVS Diode, Schottky Diode, NMOSFET
- Programmable Settings: Overvoltage up to 40V, UVLO at 12.8V, OVLO at 36.2V
- Current Limit Types: Adjustable (Autoretry, Continuous, Latch-off)
General Description
The MAX17526A evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the MAX17526A high accuracy adjustable power limiter in a 20-pin TQFN-EP package. The EV kit can be configured to demonstrate adjustable overvoltage, undervoltage, overcurrent, different current-limit types, and power-limit features.
Evaluates: MAX17526A/B/C – 5.5V to 60V, 6A Current Limiter with OV, UV, Reverse Protection, and Power Limit
Features
- 5.5V to 60V Wide Input Voltage Range
- Features a TVS Diode across the Input and Schottky Diode across the Output Terminals
- External NMOSFET Installed
- Evaluates UVLO, OVLO, Three Current-Limit Types, and Current-Limit Threshold
- Programmable Input Overvoltage Setting up to 40V
- Demonstrates Internal UVLO programmed to 12.8V
- Demonstrates Internal OVLO programmed to 36.2V
- Active Power Limit to Protect Supply or Load
- Proven PCB Layout
- Fully Assembled and Tested
Ordering Information appears at end of data sheet.
Quick Start
Recommended Equipment
- MAX17526A EV kit
- 60V DC power supply
- Multimeters
- Adjustable load (0A to 10A)
- 5V DC power supply
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.
- Verify that all jumpers are in their default positions.
- Connect a 5V DC power supply to VIO (TP21).
- Set the 40V DC power supply to 10V and connect it between VSN (TP1/TP2) and GND (TP3/TP4). Verify that LED1 is on and FLAG (TP15) is 0V.
- Increase the DC power-supply voltage and verify that LED2 turns on when voltage reaches approximately 12.8V. Also check that voltage on VOUT (TP5/TP6) is 12.8V and FLAG is 5V.
- Gradually increase the DC power-supply voltage and verify that LED2 turns off when voltage reaches approximately 36.2V. Also check that voltage on VOUT goes down and FLAG is 0V.
- Gradually decrease the DC power-supply voltage and verify that LED2 turns on when voltage reaches approximately 34.1V. Also check that voltage on VOUT is 34.1V and FLAG is 5V.
- Set the DC power-supply voltage 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 the VOUT goes down and FLAG goes low when the load current increases above 6A.
- The jumpers JU7-JU10 can be configured to change the current limit as in Table 7. Verify various current-limit operations by repeating step 7.
Evaluation Kit
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-con-figurable through jumpers JU7-JU10. Using jumper JU2, the EV kit circuit can be configured to evaluate different current-limit types (Autoretry, Continuous, and Latch-off). The EV kit also features LEDs to indicate the presence of input and output voltages (see Table 1).
Input Power Supply
The EV kit is powered by a user-supplied 5.5V to 60V power supply connected between TP1/TP2 (VSN) and GND.
Enable Inputs
Use jumpers JU1 and JU12 to enable the device (see Table 2 for jumper settings and Table 3 for enable switch status).
UVLO/OVLO Threshold
Use jumpers JU3 and JU5 to select internal or external OVLO threshold. Install a shunt on either JU3 or JU5. See Table 4 for jumper settings.
Table 1. LED Indicator (LED1, LED2)
| LED | DESCRIPTION |
| LED1 | LED1 is on when SN is powered |
| LED2 | LED2 is on when OUT is powered |
Table 2. Enable Inputs Jumper Setting (JU1, JU12)
| JUMPER | SHUNT POSITION | DESCRIPTION |
|
JU1 |
1-2 | HVEN pin connected to VSN |
| 2-3* | HVEN pin connected to GND | |
|
JU12 |
Installed | EN is high |
| Not Installed* | EN is low |
*Default Position
The external OVLO threshold for input voltage is set through either R2/R3 or R6 resistive divider. Use the following equation to calculate the value of R2 for a required OVLO threshold level:
where:
- R2 can be chosen as 2.2MΩ
- VSET_OVLO = 1.22V
- VOVLO = Required overvoltage protection threshold
Use jumpers JU4 and JU6 to select internal or external UVLO thresholds. Install a shunt on either JU4 or JU6. See Table 5 for jumper settings. The external UVLO threshold for input voltage is set through either R4/R5 or R7 resistive divider. Use the following equation to calculate the value of R4 for a required UVLO threshold level:
where:
- R5 can be chosen as 2.2MΩ
- VSET_UVLO = 1.26V
- VUVLO = Required undervoltage protection threshold
Table 3. Enable Inputs Switch Status
| HVEN | EN | MAX17526A STATUS |
| 0 | 0 | ON |
| 0 | 1 | ON |
| 1 | 0 | OFF |
| 1 | 1 | ON |
Power Limit Threshold
The EV kit features jumpers (JU13-JU14) to use differ-ent power limit thresholds. Install jumpers as shown in Table 6 to change the power-limit threshold. Refer to the MAX17526A data sheet to program PLIM using R21 and R22 (or R16 resistive divider).
Current-Limit Threshold
The EV kit features jumpers (JU7-JU10) to use different resistors to program the current-limit threshold. Install a jumper as shown in Table 7 to change the current-limit threshold.
Current-Limit Type Select
The EV kit features jumper JU2 to select different current-limit responses. See Table 8 for jumper settings.
Table 4. OVLO Threshold Jumper Setting (JU3, JU5)
| JUMPER | SHUNT POSITION | DESCRIPTION |
|
JU3 |
Installed* | OVLO is connected to ground; internal OVLO threshold is used (do not install JU5). |
| Not Installed | OVLO is programmable | |
|
JU5 |
1-2 |
OVLO is connected to VSN with external voltage-divider; use either R2/R3 or R6 to set over- voltage threshold (do not install JU3). |
|
2-3 |
OVLO is connected to VIN with an external voltage-divider; use either R2/R3 or R6 to set overvoltage threshold (do not install JU3). | |
| Not Installed* | Internal OVLO is selected through JU3 |
*Default Position
Table 5. UVLO Threshold Jumper Setting (JU4, JU6)
| JUMPER | SHUNT POSITION | DESCRIPTION |
|
JU4 |
Installed* | UVLO is connected to ground; internal UVLO threshold is used (do not install JU6). |
| Not Installed | UVLO is programmable | |
|
JU6 |
1-2 |
UVLO is connected to VSN with external voltage-divider; use either R4/R5 or R7 to set over-voltage threshold (do not install JU4). |
|
2-3 |
UVLO is connected to VIN with external voltage-divider; use either R4/R5 or R7 to set over-voltage threshold (do not install JU4). | |
| Not Installed* | Internal UVLO is selected through JU4 |
*Default Position
Table 6. PLIM Threshold Jumper Setting (JU13, JU14)
| JUMPER | SHUNT POSITION | DESCRIPTION |
|
JU13 |
Installed* | PLIM is connected to ground; PLIM is disabled (do not install JU14). |
| Not Installed | PLIM is programmable | |
|
JU14 |
1-2 |
PLIM is connected to VOUT with external voltage-divider; Use either R21/R22 or R16 to set PLIM threshold (do not install JU13). |
|
2-3 |
PLIM is connected to VIN with external voltage-divider; Use either R21/R22 or R16 to set PLIM threshold (do not install JU13). | |
| Not Installed* | PLIM is disabled |
*Default Position
Table 7. Current-Limit Threshold (JU7-JU10)
| JUMPER | SHUNT POSITION | DESCRIPTION |
|
JU7 |
Installed* | Current-limit 0.6A |
| Not Installed | SETI open. Part is disabled. | |
|
JU8 |
Installed | Current-limit 2.9A |
| Not Installed* | SETI open. Part is disabled. | |
|
JU9 |
Installed | Current-limit 6.0A |
| Not Installed* | SETI open. Part is disabled. | |
|
JU10 |
Installed | Current-limit adjustable |
| Not Installed* | SETI open. Part is disabled |
*Default Position
Table 8. Current-Limit Type Select (JU2)
| JUMPER | SHUNT POSITION | DESCRIPTION |
|
JU2 |
1-2* | Autoretry |
| 2-3 | Latch-off | |
| Open | Continuous |
*Default Position
MAX17526A EV Kit Performance Report
(VIN = 24V, unless otherwise noted.)
MAX17526A EV Kit Performance Report (continued)
(VIN = 24V, unless otherwise noted.)
Component Suppliers
| SUPPLIER | WEBSITE |
| Bourns, Inc. | www.bourns.com |
| Infineon | www.infineon.com |
| Lite-On, Inc. | www.us.liteon.com |
| Lumex Inc. | www.lumex.com |
| Murata Americas | www.murata.com |
| Panasonic Corp. | www.panasonic.com |
| TDK Corp. | www.component.tdk.com |
| ON Semiconductor | www.onsemi.com |
| SullinsCorp Connector Solutions | www.sullinscorp.com |
| Keystone Electronics Corp | www.keyelco.com |
Note: Indicate that you are using the MAX17526A when contacting these component suppliers.
Ordering Information
| PART | TYPE |
| MAX17526AEVKIT# | EV Kit |
MAX17526A EV System Bill of Materials
| PART REFERENCE | QTY | DESCRIPTION | MANUFACTURER PART NUMBER |
| C1, C5 | 2 | 1µF 10%, 100V X7R ceramic capacitors (1206) | Murata GRM31CR72A105KA01L; TDK C3216X7R2A105K160 |
| C2, C4 | 2 | 10µF 20%, 63V aluminium electrolytic (5mm) | Panasonic ECA-1JHG100 |
| C3 | 1 | 1µF 10%, 6.3V X7R ceramic capacitors (0603) | Murata GRM188R60J105KA01 |
| D1 | 1 | Power Schottky Diode, 50V, 1A (SMA) | ON Semiconductor MURA105T3G |
| D2 | 1 | TVS Diode, 1500W (SMC) | Generic Part SMCJ36CA |
| JU1, JU2, JU5, JU6, JU14 | 5 | 3-Pin Single-Row Header, 0.1in centers, cut to fit | Sullins Connector PEC03SAAN |
| JU3, JU4, JU7-JU10, JU12, JU13 | 8 | 2-Pin Single-Row Header, 0.1in centers, cut to fit | Sullins Connector PEC02SAAN |
| LED1 | 1 | Green LED (1206) | Lumex Optocomponents SML-LX1206GW-TR |
| LED2 | 1 | Yellow LED (1206) | Lite-On Electronics LTST-C150KSKT |
| Q1 | 1 | N-CH MOSFET 100V 40A | Infineon BSZ150N10LS3 G |
| R1, R15 | 2 | 220k ohm 1% resistors (0603) | – |
| R6, R7, R16 | 3 | 1M ohm Trimmer Potentiometers | Bourns Inc. PV36W105C01B00 |
| R8 | 1 | 62k ohm 1% resistor (0603) | – |
| R9 | 1 | 13k ohm 1% resistors (0603) | – |
| R10 | 1 | 6.2k ohm 1% resistors (0603) | – |
| R11 | 1 | 100k ohm Trimmer Potentiometers | Bourns Inc. 3296W-1-104LF |
| R12, R13 | 2 | 10k ohm 1% resistors (0603) | – |
| R14 | 1 | 100k ohm 1% resistors (0603) | – |
| R17, R18 | 2 | 2.7k ohm 1% resistors (0805) | – |
| R19, R20 | 2 | 0 ohm 5% resistors (0805) | – |
| TP1, TP5, TP17 | 3 | Red Banana Connector | Keystone Electronics Corp 7006 |
| TP2, TP6, TP12, TP18 | 4 | Red Test Point | Keystone Electronics Corp 5000 |
| TP3, TP7 | 2 | Black Banana Connector | Keystone Electronics Corp 7007 |
| TP4, TP8, TP22-TP27 | 8 | Black Test Point | Keystone Electronics Corp 5001 |
| TP9-TP11, TP14, TP16, TP20 | 6 | Yellow Test Point | Keystone Electronics Corp 5004 |
| TP15 | 1 | White Test Point | Keystone Electronics Corp 5002 |
| TP21 | 1 | Orange Test Point | Keystone Electronics Corp 5003 |
| U1 | 1 | 5.5V to 60V, 6A Current-Limiter with OV, UV, Reverse Protection, and Power Limit (20-Pin TQFN-EP 5mm x 5mm) | MAX17526AATP+ |
| C6 | 0 | 10µF 20%, 63V aluminium electrolytic (5mm) | Panasonic ECA-1JHG100 |
| JU11 | 0 | 2-Pin Single-Row Header, 0.1in centers, cut to fit | Sullins Connector PEC02SAAN |
| R2-R5, R21, R22 | 0 | 0603 Resistors (Open) | – |
| PCB | 1 | PCB: MAX17626A Evaluation Kit | – |
MECHANICAL
MAX17526A EV System Schematic
System PCB Layouts
MAX17526A EV System PCB Layouts
MAX17526A EV System PCB Layouts (continued)
Revision History
| REVISION NUMBER | REVISION DATE | DESCRIPTION | PAGES CHANGED |
| 0 | 6/18 | Initial release | — |
| 1 | 10/24 | Added MAX17526B and C to title | 1–12 |
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. All Analog Devices products contained herein are subject to release and availability.
MOREINFORMATION
FAQs
- Q: How can I change the overvoltage and undervoltage thresholds on the MAX17526A EV kit?
- A: The thresholds can be adjusted using resistor-dividers. Refer to the user manual for detailed instructions on configuring the UVLO and OVLO thresholds.
- Q: What should I do if LED indicators do not function correctly during testing?
- A: Double-check all connections and jumper settings. Ensure the power supplies are providing the correct voltages as per the instructions. If issues persist, contact customer support for further assistance.
Documents / Resources
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ANALOG DEVICES MAX17526A Evaluation Kit [pdf] Instruction Manual MAX17526A, MAX17526A Evaluation Kit, Evaluation Kit, Evaluation |
