Evaluation Board User Guide UG-534 One Technology Way * P.O. Box 9106 * Norwood, MA 02062-9106, U.S.A. * Tel: 781.329.4700 * Fax: 781.461.3113 * www.analog.com iCoupler ADuM3190 Isolated Error Amplifier Evaluation Board FEATURES GENERAL DESCRIPTION Isolated error amplifier Stable over time and temperature 0.5% initial accuracy 1% accuracy over the full temperature range For Type II or Type III compensation networks Reference voltage: 1.225 V Low power operation: <7 mA total Wide supply voltage range VDD1: 3 V to 20 V VDD2: 3 V to 20 V Bandwidth: 400 kHz Isolation voltage: 2.5 kV rms Wide temperature range -40C to +125C ambient operation 150C maximum junction temperature The EVAL-ADuM3190EBZ supports the ADuM3190 isolated error amplifier based on Analog Devices, Inc., iCoupler(R) technology. The ADuM3190 is ideal for linear feedback power supplies with primary side controllers enabling improvements in transient response, power density, and stability as compared to commonly used optocoupler and shunt regulator solutions. Included in the ADuM3190 is a wideband operational amplifier that can be used to set up a variety of commonly used power supply loop compensation techniques. The ADuM3190 is fast enough to allow a feedback loop to react to fast transient conditions and over current conditions. Also included is a high accuracy 1.225 V reference to compare with the supply output set point. Complete specifications for the ADuM3190 are provided in the ADuM3190 data sheet available from Analog Devices, Inc., and should be consulted in conjunction with this user guide when using the evaluation board. 11337-001 EVALUATION BOARD Figure 1. EVAL-ADuM3190EBZ PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 8 UG-534 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Left-Side Power Connections ......................................................3 General Description ......................................................................... 1 Right-Side Power Connections ...................................................3 Evaluation Board .............................................................................. 1 Accuracy Test Connections .........................................................3 Revision History ............................................................................... 2 Evaluation Board Schematics and Artwork ...................................4 Evaluation Board Hardware ............................................................ 3 Ordering Information .......................................................................7 ADuM3190 Isolated Error Amplifier ........................................ 3 Bill of Materials ..............................................................................7 EVAL-ADuM3190EBZ Schematic ............................................. 3 REVISION HISTORY 2/13--Revision 0: Initial Version Rev. 0 | Page 2 of 8 Evaluation Board User Guide UG-534 EVALUATION BOARD HARDWARE ADuM3190 ISOLATED ERROR AMPLIFIER ACCURACY TEST CONNECTIONS The EVAL-ADuM3190EBZ board, shown in Figure 1, can be used to evaluate the performance and data sheet specifications of the ADuM3190. Figure 2 shows the schematic of the EVAL-ADuM3190EBZ circuit which can be used to test the accuracy of the ADuM3190 and perform other tests. The EVAL-ADuM3190EBZ is a 4-layer PC board, complete with ground and power layers as shown in the Evaluation Board Schematics and Artwork section. In the EVAL-ADuM3190EBZ schematic (see Figure 2), a blue line outlines the EAOUT accuracy circuit. Capacitor C7 (2.2 nF) together with R8 (680 ) and R7 (0 ) resistors form an integrator circuit to close the loop from the -IN input to the EAOUT output. A 1% accurate internal reference voltage of 1.225 V at REFOUT is connected to the noninverting op amp input +IN through a 0 resistor, R9, providing the reference for the accuracy test circuit. See Figure 3, ADuM3190 Test Circuit 1, or the ADuM3190 data sheet for more information about the operation of the ADuM3190. EVAL-ADUM3190EBZ SCHEMATIC Figure 2 shows the ADuM3190 schematic of the EVALADuM3190EBZ evaluation board. U1 is the ADuM3190 in the center of the board and Pin 1 is the top-left pad with respect to the notch in the silkscreen's package outline. C1, C2, C3, and C4 are ceramic 0603 1 F bypass capacitors provided for proper bypassing of the ADuM3190 internal 3 V regulators on both sides of part. Also added to the board are 10 F 0805 ceramic capacitors to the VDD1 and VDD2 connections to provide additional bypassing in case long wires are used from power supplies to the evaluation board. Test point connectors are provided for most of the important connections to pins of the ADuM3190. The following sections describe connections to make to power the EVAL-ADuM3190EBZ and make performance tests. LEFT-SIDE POWER CONNECTIONS Connect the left-side external power supply (3 V to 20 V) to P1 (labeled VDD1) and return it to P2 (labeled GND1). RIGHT-SIDE POWER CONNECTIONS Connect the right-side external power supply (3 V to 20 V) to P9 (labeled VDD2) and return it to P10 (labeled GND2). For accuracy tests, add a wire between GND1 and GND2 for EAOUT and EAOUT2 (see Figure 3). This connection is needed because the accuracy tests connect a 680 resistor across the isolation barrier and creates a current path between the two isolated areas, so a ground return is needed for the accuracy tests. The accuracy of the EAOUT output will be within 1% of the reference voltage specified value of 1.225 V. Next, the EAOUT2 accuracy in Figure 4 (Test Circuit 2) can be performed by removing the R7 (0 ) resistor and placing a 0 resistor at R5, completing the EAOUT2 circuit. Because the EAOUT2 circuit has a high gain and uses the same internal reference voltage to connect to the -IN input of the op amp, the accuracy of the EAOUT2 output is also within 1% of the reference voltage specified value of 1.225 V. For tests other than the accuracy tests, open the 680 resistor connections by removing R5 and R7 (0 ), the C7 integrating capacitor, and the external wire connection made between GND1 and GND2. Once completed, other components may be added to the evaluation board per the schematic in Figure 2 to make circuits for other tests such as ADuM3190 data sheet specifications for the op amp, reference, UVLO, output characteristics, or power supply. Rev. 0 | Page 3 of 8 UG-534 Evaluation Board User Guide 11337-002 EVALUATION BOARD SCHEMATICS AND ARTWORK Figure 2. EVAL-ADuM3190EBZ Schematic Rev. 0 | Page 4 of 8 Evaluation Board User Guide VDD1 1F GND1 1F VREG1 UG-534 1 16 2 15 3 REG REFOUT1 4 REF NC 5 12 EAOUT2 EAOUT 6 11 UVLO REG REF Rx 7 Tx 14 1F VREG2 1F REFOUT 13 +IN 10 8 GND2 -IN 680 COMP 2.2nF GND2 9 11337-003 GND1 UVLO VDD2 Figure 3. ADuM3190 Test Circuit 1 VDD1 1F GND1 1F VREG1 16 2 15 3 REG REFOUT1 4 REF NC 5 12 6 11 EAOUT2 EAOUT GND1 7 UVLO UVLO REG REF Rx Tx 8 14 13 10 9 VDD2 GND2 1F VREG2 1F REFOUT +IN -IN 680 COMP 2.2nF GND2 11337-010 ROD 1 Figure 4. ADuM3190 Test Circuit 2 Rev. 0 | Page 5 of 8 11337-006 Evaluation Board User Guide 11337-004 UG-534 Figure 7. Layer 3--Power Plane Figure 6. Layer 2--Ground Plane 11337-007 11337-005 Figure 5. Top Layer--Power Fill Figure 8. Bottom Layer--Ground Fill Rev. 0 | Page 6 of 8 Evaluation Board User Guide UG-534 ORDERING INFORMATION BILL OF MATERIALS Table 1. Qty 6 7 1 4 2 1 1 2 2 Reference Designator P2, P4, P6, P10, P16, P17 P1, P3, P5, P9, P13, P14, P15 U1 C1, C2, C3, C4 C5, C6 C7 R3 R7, R9 R6, R8 Description TP-104 series test point, black TP-104 series test point, red ADuM3190TRQZ Capacitor ceramic, X7R, SMD, 0603, 1 F, 20%, 20 V Capacitor ceramic, X7R, SMD, 0805, 10 F, 20%, 20V Capacitor ceramic, X7R, SMD, 0603, 2.2 nF, 20% 16 V Resistor chip, SMD 0805, 10 k, 1/8 W, 1% Resistor chip, SMD 0805, 0 , 1/8 W, 1% Resistor through hole, 680 , 1/4 W, 5% Rev. 0 | Page 7 of 8 Supplier/Part Number Components Corp./TP-104-01-00 Components Corp./TP-104-01-02 Analog Devices, Inc. UG-534 Evaluation Board User Guide NOTES ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the "Evaluation Board"), you are agreeing to be bound by the terms and conditions set forth below ("Agreement") unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you ("Customer") and Analog Devices, Inc. ("ADI"), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. 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