Evaluates: MAX17612A 4.5V to 60V, 250mA, Current-Limiter with OV, UV, and Reverse Protection. MAX17612A Evaluation Kit.

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1 Click here for production status of specific part numbers. General Description The MAX76A evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the MAX76A 4.5V to 60V, 50mA, current-limiter with OV, UV, and reverse protection in a 0-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 6V Jumper-Configurable Current-Limit (Selected as 50mA 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. Quick Start Recommended Equipment MAX76A EV kit 60V DC power supply Multimeters Adjustable load (0A A) USB-A male to USB-B male cable or 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 the USB cable to J from a computer or connect a 5V-DC power supply to TP. ) Verify that LED is on. 4) Set the 60V DC power supply to 5V and connect to IN (J/TP6). Verify that OUT (J/TP8) is 5V. 5) Gradually increase the DC power-supply voltage and verify that OUT voltage goes down and UVOV goes low when input reaches approximately 6V. 6) Gradually decrease the DC power-supply voltage and verify that OUT comes back and UVOV goes high when the input reaches approximately 4.8V. 7) Set the DC power-supply voltage to 4V and connect the adjustable load between OUT and 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 50mA. 8) The jumper JU can be configured to change the current limit as given in Table. Verify various current limit operations by repeating step 7. CAUTION: When applying a negative input to, the negative input test should be performed when the output capacitors are fully discharged and V BUS is not supplied ; Rev ; 8/8

2 Detailed Description The EV kit circuit can be configured to evaluate userdefined UVLO and OVLO thresholds using resistor-dividers. The overcurrent threshold is determined by external resistors connected to the SETI pin and is jumper-configurable through jumper JU. Using jumper JU4, the EV kit circuit can be configured to evaluate different current limit types (Autoretry, Continuous, and Latch-off). LED 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 MAX76A protection features. Input-Power Supply The EV kit is powered by a user-supplied 4.5V to 60V power supply connected between J/TP6 (INPUT POWER) and. Enable To enable the device, connect a USB-A male connector from the computer to the USB-B female connector, J, or an external 5V supply to TP and. 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 MAX76A (see Table ). Table. Enable (JU5) UVLO/OVLO Threshold The UVLO threshold for input voltage is set through the R9, R0 resistive divider. Use the following equation to calculate the value of R0 for a required undervoltage threshold level: R9 R0 = VUVLO VREF where R9 can be chosen as.mω, V REF is.5v, and V UVLO is the required undervoltage protection threshold. The OVLO threshold for input voltage is set through the R, R resistive divider. Use the following equation to calculate the value of R for a required overvoltage threshold level: R R = VOVLO VREF where R can be chosen as.mω, V REF is.5v, and V OVLO is the required overvoltage protection threshold. Current-Limit Threshold The EV kit features a jumper (JU) to select the currentlimit threshold. Install a jumper as shown in Table to change the current-limit threshold. JUMPER SHUNT POSITION DESCRIPTION MAX76A STATUS JU5 *Default position. Table. Current-Limit Threshold (JU) *Default position. -* EN pin connected to V BUS ON - EN pin connected to OFF Open EN pin floating ON JUMPER SHUNT POSITION DESCRIPTION JU - Current limit 0mA -4 Current limit 00mA 5-6* Current limit 50mA 7-8 Current limit adjustable Maxim Integrated

3 Current-Limit Type Select The EV kit features jumper JU4 to select different currentlimit responses. See Table for jumper settings. Output-Load Capacitor Use JU6 to connect the OUT pins to the OUT test point (TP8). Use jumper JU7 to connect output to 0µF capacitors. See Table 4 for jumper settings Table. Current-Limit Type Select (JU4) JUMPER SHUNT POSITION DESCRIPTION - Latch-off JU4 - Continuous Open* Autoretry *Default position. Table 4. Output Load Capacitor (JU7) JUMPER SHUNT POSITION DESCRIPTION Installed OUT connected to C4 and C5. JU7 Not installed* OUT not connected to C4 and C5. *Default position. Maxim Integrated

4 MAX76A EV Kit Performance Report ( = 4V, C IN = 0.47μF, C OUT = 4.7μF, unless otherwise noted.) POWER-UP RESPONSE WITH 0µF CAPACITOR AT NO LOAD toc0 REVERSE-BLOCKING RESPONSE toc0 OUTPUT SHORT-CIRCUIT RESPONSE toc0 4V 4V 5V V UVOV I IC A/div 0ms/div 4µs/div 0ms/div CURRENT-LIMIT RESPONSE toc04 AUTORETRY CURRENT-LIMIT RESPONSE toc05 CONTINUOUS CURRENT-LIMIT RESPONSE toc06, I L = 0mA TO SHORT ON OUT WITH A/s 00ms/div 00ms/div 00ms/div LATCH-OFF CURRENT-LIMIT RESPONSE toc07 OVERVOLTAGE FAULT RESPONSE 4V 48V toc08 R LOAD = 40Ω C OUT = 4.7µF 0v/div V UVOV 00ms/div ms/div Maxim Integrated 4

5 Component Suppliers Bourns, Inc. SUPPLIER 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 MAX76A when contacting these component suppliers WEBSITE Ordering Information PART MAX76AEVKIT# TYPE EV Kit Maxim Integrated 5

6 MAX76A EV Kit Bill of Materials PART REFERENCE QTY DESCRIPTION MANUFACTURER PART NUMBER C µf 0%, 50V X5R ceramic capacitors (060) Murata GRM88R6H05KAAL C 0.47µF 0%, 00V X7R ceramic capacitors (0805) Murata GRMBR7A474KA7L C 4.7µF 0%, 00V X7R ceramic capacitors (0) Kemet C0C475KRC, Murata GRMER7A475KE4 C4 0µF 0%, 50V aluminium (0mm) Panasonic EEU-EBH D TVS Diode, 600W (SMB) Bourns SMBJ40CA D Power Schottky Diode, 60V, 5A (SMC) Diodes Incorporated B560CQ--F D Power Schottky Diode, 60V, A (SMA) Diodes Incorporated B60--F J USB B connector FCI Connect BLF J, J -Pin Green PC Terminal Block Degson Electronics DG P-4 JU x4 Dual-Row Header, 0.in centers, cut to fit Sullins Connector PBC04DAAN JU, JU6, JU7 -Pin Single-Row Header, 0.in centers, cut to fit Molex Connector JU4, JU5 -Pin Single-Row Header, 0.in centers, cut to fit Sullins Connector PEC0SAAN LED Green LED (06) Kingbright APT6SGC R k ohm % resistors (060) - R, R 0k ohm % resistors (040) - R4 50k ohm 5% resistor (040) - R5, R 5k ohm 0.% resistors (040) - R6 0k ohm % resistors (040) - R7 k ohm % resistors (040) - R8, R5.k ohm % resistors (040) - R9, R.M ohm 5% resistors (040) - R0.M ohm % resistors (040) - R 95.k ohm % resistors (040) - R4 0k ohm % resistors (040) - R6 5k ohm Trimmer Potentiometers Bourns 96Y--5LF TP, TP9, TP-TP 5 White Test Point Keystone Electronics Corp 500 TP, TP4, TP5, TP7 4 Black Test Point Keystone Electronics Corp 500 TP, TP6, TP8 Red Test Point Keystone Electronics Corp 5000 TP0 Green Test Point Keystone Electronics Corp 56 U with OV, UV and Reverse Protection (0-pin TDFN-EP, mmxmm) MAX76AATB+ C5 0 Not Installed; 0µF 0%, 50V aluminium (0mm) Panasonic EEU-EBH D4 0 Not Installed; TVS Diode, 600W (SMB) Bourns SMBJ40CA PCB PCB: - Maxim Integrated 6

7 MAX76A EV Kit Schematic J BLF VIN UVLO TP 5V TP R K LED POWER R9.M R0.M C UF R.M R 95.K B60--F INPUT POWER IN TP6 J DG P-4 OVLO TP TP5 TP0 EN 50K TP4 VIN R5 5K C 0.47UF 5K OPEN D4 40V U MAX76AATB+ VOUT D B560CQ--F VOUT C 4.7UF UVOV R TP9 0K JU R6 R7 R8 0K K.K JU7 FLAG R TP 0K SETI TP 0K 5K R6 TP R5.K MTHOLE X OUTPUT POWER OUT TP8 C4 C5 0UF OPEN TP7 MTHOLE MTHOLE MTHOLE X X X4 J DG P A C D A C JU5 R4 D 40V JU4 JU JU6 R D- D+ S S R IN OUT OVLO UVOV UVLO FLAG EN SETI CLMODE EP Maxim Integrated 7

8 MAX76A EV Kit PCB Layout.0.0 MAX76A EV Kit PCB Layout Top Silkscreen MAX76A EV Kit PCB Layout Top Layer.0 MAX76A EV Kit PCB Layout Bottom Layer Maxim Integrated 8

9 Revision History REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 0 7/8 Initial release 8/8 Updated TOC0 and the Bill of Materials 4 6 For pricing, delivery, and ordering information, please visit Maxim Integrated s online storefront at Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 08 Maxim Integrated Products, Inc. 9