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LX7302 Evaluation Board

Microsemi Proprietary and Confidential. LX7302 User Guide Revision 2.0

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Summary of Contents for LX7302

Page 1: ...LX7302 User Guide LX7302 Evaluation Board Preliminary November 2018...

Page 2: ...ide Revision 2 0 Contents 1 Revision History 1 1 1 Revision 2 0 1 1 2 Revision 1 0 1 2 Product Description 2 3 Evaluation Board Operation 3 4 PCB Layout Guidelines 4 5 Test Considerations 10 6 Evaluat...

Page 3: ...l LX7302 User Guide Revision 2 0 1 1 Revision History 1 1 Revision 2 0 Revision 2 0 was published in November 2018 In Revision 1 1 was updated Table 3 see page 19 1 2 Revision 1 0 Revision 1 0 was pub...

Page 4: ...drive a high side N channel MOSFET and a low side N channel synchronous rectifier The controller includes the following features Inductor current sensing Voltage droop control Programmable VID contro...

Page 5: ...nitor point for output voltage Five 16 AWG through hole connections provided for high current load return TP7 FCCM PSM input Control for LX7302 power saver mode A voltage greater than 2 5 V on this pi...

Page 6: ...sed establish the common ground at C2 An R C network consisting of R13 and C1 is used for sensing the voltage drop across L1 Both R13 and C1 should be mounted close to L1 and their respective connecti...

Page 7: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 5 Figure 1 PCB Critical Traces Figure 2 Silkscreen Top...

Page 8: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 6 Figure 3 Top Layer...

Page 9: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 7 Figure 4 Ground Layer...

Page 10: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 8 Figure 5 Power Layer...

Page 11: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 9 Figure 6 Bottom Layer...

Page 12: ...re jumper Configuring the External Reference Mode will disable the VID Mode they cannot be configured at the same time See the LX7302 Datasheet for further information The LX7302 evaluation board is c...

Page 13: ...icrosemi Proprietary and Confidential LX7302 User Guide Revision 2 0 11 6 Evaluation Board Test Data This section features the evaluation board test data graphs for the LX7302 Figure 7 Load Regulation...

Page 14: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 12 Figure 9 Efficiency vs Output Current Figure 10 Soft Start 5 A Load...

Page 15: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 13 Figure 11 Start Up Profile 5 A Load...

Page 16: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 14 Figure 12 PSM Start Up into 1 A Load...

Page 17: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 15 Figure 13 Soft Shutdown No Load...

Page 18: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 16 Figure 14 VID00 to VID11 Change 0 2 Load...

Page 19: ...LX7302 Evaluation Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 17 Figure 15 VID11 to VID00 Change 0 2 Load...

Page 20: ...tion Board Microsemi Proprietary and Confidential LX7302 User Guide Revision 2 0 18 7 Evaluation Board Schematic The section shows the schematic of the LX7302 evaluation board Figure 16 Evaluation Boa...

Page 21: ...ECJ 1VC1H100D 8 2 C9 C10 Capacitor 560 F 2 5 V polymer electrolytic 13m ESR 6 mm 7 7 mm SMD United Chemi Con APXE2R5ARA561MF 9 3 C12 C13 C14 Capacitor 330 F 25 V polymer electrolytic 5 A ripple Oscon...

Page 22: ...YJ472 25 1 R12 Resistor 10 1 10 W 5 0603 type SMD Panasonic ERJ3GSYJ100 26 1 R13 Resistor 1 0 k 1 10 W 5 0603 type SMD Panasonic ERJ3GSYJ102 27 1 R14 Resistor 5 11 k 1 10 W 1 0603 type SMD Panasonic E...

Page 23: ...ently determine suitability of any products and to test and verify the same The information provided by Microsemi hereunder is provided as is where is and with all faults and the entire risk associate...

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