Click here for production status of specific part numbers. Evaluates: MAX40056F MAX40056 Evaluation Kit MAX40056T MAX40056U General Description Quick Start The MAX40056 evaluation kit (EV kit) is a fully assembled Required Equipment electrical demonstration kit that provides a proven design MAX40056 EV kit to evaluate the MAX40056F/MAX40056T/MAX40056U 0-60V, 3A DC Power Supply for VCM Input high-precision, high-voltage, bidirectional current sense +3.6V, 100mA MAX40056F/MAX40056T/ amplifier for PWM applications, such as servo motor con - MAX40056U device DC power supply trol and solenoid drive. The MAX40056F/MAX40056T/ +3.6V DC power supply or a voltage calibrator for MAX40056U are ideal for 48V, or less BLDC, induction OVC/ CIP input motor applications (such as robotics), pick-and-place Electronic load capable for sinking 3A (HP6060B) machines, 3D prints, or other servo motor control systems. Three digital voltmeters (Agilent 34401A 61/2 digital This EV kit demonstrates the MAX40056FAUA+ in an 8-pin multimeter) MAX package, with Gain = 50V/V. For other available pin-compatible options (MAX40056TAUA+, Gain = 20V/V, Procedure MAX40056HAUA+, Gain = 10V/V), contact the factory. The MAX40056 EV kit is fully assembled and tested. Follow the following steps to verify board operation: Features Caution: Do not turn on the power supply or the Precision Real-Time Current-Monitoring with Fault electronic load until all the connections are complete. Detection 1) Connect a +3.3V supply and ground to VDD Internal Available1.5V Reference connector. -0.3V to +65V Input Common Mode Range 2) Connect the positive terminal of the +0-60V DC power supply to the RS+ input and the negative -40C to +125C Temperature Range terminal to the GND input. Evaluates 8-MAX MAX40056FAUA+ Device 3) Set the electronic load to sink 300mA. Proven PCB Layout 4) Connect the positive terminal of the electronic load to the RS- input and the negative terminal of the Fully Assembled and Tested electronic load to the nearest GND input connection on the board. Ordering Information appears at end of data sheet. 5) Connect the first voltmeter between the test points MAX40056 EV KIT PHOTO Agilent is a registered trademark and registered service mark of Agilent Technologies, Inc. 319-100264 Rev 1 12/18Evaluates: MAX40056F MAX40056 Evaluation Kit MAX40056T MAX40056U VRS+ and VRS- to measure the differential input Theory of Operation voltage across the inputs (V ). SENSE Bidirectional Operation 6) Install jumper J2 and connect the positive terminal of The MAX40056 EV kit evaluates the MAX40056F/ the calibrator/DC power supply to OVC input. Set the MAX40056T/MAX40056U bidirectional current sense calibrator/DC power supply voltage output to 500mV. amplifier. The output is set to the V voltage at REF 7) Connect the second voltmeter across OUT and GND no load. The V voltage can either be from inter- REF test point to measure the MAX40056F/MAX40056T/ nal 1.5V reference voltage generated or an external MAX40056U output. reference supplied at V input. That sets the bias REF 8) Connect the third voltmeter across COP and GND voltage to V (V) for a no-current condition. Current REF test point to measure over current fault status at in the positive direction in reference to RS+ and COP output. RS- increases the output voltage from V (V) and REF 9) Turn on the power supplies and the calibrator and current in the negative direction decreases the output then the electronic load. voltage from V (V). REF 10) Enable the electronic load. 11) Verify that the first voltmeter displays 300mA x 50m Hence, the output equation becomes: = +15mV and the second voltmeter displays 2.25V. V (V) = (I (A) x R ()) x GAIN(V/V) OUT LOAD SENSE 12) Verify that the COP output is high (+3.3V). + V (V) REF 13) Now change the OVC input from 500mV to 1V on External Reference the calibrator output setting. 14) Verify that the COP output is low (~0V). When choosing external reference at VREF input, it is 15) Turn off the electronic load and set the electronic recommended to choose V (V) = (1/2) x V (V) and REF DD load to source 300mA. the V (V) value must not exceed absolute maximum DD 16) Turn on the electronic load and verify that the first ratings. voltmeter displays -15mV and the second voltmeter Overcurrent Fault Protection displays 750mV. The MAX40056 device features an integrated win- 17) Verify that the COP output is low (~0V). dow comparator to monitor overcurrent condi- 18) After the functions are verified, do not forget to turn off tions. An overcurrent threshold voltage input is the electronic load, calibrator and the power supply. provided to the OVC input, which monitors for overcurrent Detailed Description of Hardware detection in both the direction. When an overcurrent condition The MAX40056 EV kit provides a proven design to evaluate occurs, the output of the window comparator goes low MAX40056F/MAX40056T/MAX40056U high-precision, indicating a fault detection. high-voltage bidirectional current sense amplifier for PWM The input range for OVC input is from 0.08V to MIN application. The device offers precision accuracy specifi - (V - 0.08, V - 1.25). REF DD cations of input offset voltage (V ) less than 10V (max) OS Threshold Input Options and gain error less than 0.2% (max). When using an external voltage source to provide OVC The device has a proprietary input stage designed to reject threshold to the CIP input, install Jumper J2 and remove high gradient PWM common mode voltage inputs and still J1 if installed. Also make sure that the resistors R5 and accurately monitors the load current across its inputs. R6 are also not populated. When using the reference voltage to provide OVC threshold to the CIP input, remove J2 and install J1. Also install Table 1. Jumper Functions (J1 J2) R5 and R6 resistors to create the desired value of OVC threshold value. JUMPER DEFAULT FUNCTION LABEL POSITION V (V) = (V x R )/(R + R ) OVC REF 6 5 6 While choosing the value of R5 and R6, make sure the OVC threshold input provided J1 Not Installed by REF output. Install R5 and total resistance is large so that the REF output is not R6 to create OVC threshold. loaded. Recommended choice of R + R = 500k. 5 6 OVC threshold input provided J2 Installed by external source Maxim Integrated 2 www.maximintegrated.com