Texas Instruments LM74700EVM User Manual Download Page 7 | Manualshive

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Texas Instruments LM74700EVM User Manual Download Page 7

EVM Board Assembly Drawings and Layout Guidelines

7

SNOU153A – October 2017 – Revised February 2019

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Copyright © 2017–2019, Texas Instruments Incorporated

LM74700 Evaluation Module

4

EVM Board Assembly Drawings and Layout Guidelines

4.1

PCB Drawings

through

show component placement and layout of this EVM.

Figure 8. LM74700EVM Top Side Placement

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Summary of Contents for LM74700EVM

Page 1: ...p 2 2 1 I O Connector Description 2 2 2 Board Setup 3 2 3 Schematic 4 3 Operation 5 3 1 Reverse Polarity Protection 5 3 2 ORing Application 6 4 EVM Board Assembly Drawings and Layout Guidelines 7 4 1 PCB Drawings 7 4 2 Bill of Materials 11 List of Figures 1 LM74700EVM Typical Application Circuit 2 2 LM74700EVM 3 3 LM74700EVM Schematic 4 4 Reverse Polarity 12 V to 12 V 5 5 Startup Reverse Polarity ...

Page 2: ...with a MOSFET and used in series with a battery as a replacement for a Schottky diode and PFET in reverse polarity protection circuitry as shown in Figure 1 For more information on the LM74700 functional and electrical characteristics see LM74700 Q1 Low IQ reverse battery protection ideal diode controller 2 Setup This section describes the jumpers and connectors on the EVM and how to properly conn...

Page 3: ...rity to the VIN and GND1 connectors An electronic or resistive load must be connected at the output VOUT and GND2 connectors The tests outlined in this document are conducted with 3 A constant current as the load and 12 V at the input Make sure that the external power supply source for the input voltage is capable of providing enough current to the output load so that the output voltage can be obt...

Page 4: ... 1 2 3 Q1 0 33 µF C5 0 33 µF C4 33 V D1 24 V D4 58 V D3 GATE VIN 3 9 V to 65 V 5A Max Current VOUT 3 9 V to 65 V 5A Max Current Setup www ti com 4 SNOU153A October 2017 Revised February 2019 Submit Documentation Feedback Copyright 2017 2019 Texas Instruments Incorporated LM74700 Evaluation Module 2 3 Schematic Figure 3 illustrates the EVM schematic Figure 3 LM74700EVM Schematic ...

Page 5: ... protected from dynamic reverse pulses at the input The LM74700 Q1 reacts to the negative voltage within 2 μs and it shuts down the MOSFET by pulling the gate CH3 voltage down The output slowly decays due to the large output capacitors and increased time constant Figure 4 Reverse Polarity 12 V to 12 V A 12 V source is connected to the VIN input of the LM74700EVM Figure 5 shows that the output volt...

Page 6: ...his test uses two LM74700EVMs with 15 V at the input of the first EVM and 12 V at the input of the second EVM and the output of both the EVMs are shorted As Figure 6 shows the 15 V source at EVM1 is turned off for a period of time and the output CH2 drops to 12 V source from EVM2 When the 15 V source is turned on again the output rises to 15 V from EVM1 CH1 shows the input to EVM1 CH2 shows the ou...

Page 7: ...uary 2019 Submit Documentation Feedback Copyright 2017 2019 Texas Instruments Incorporated LM74700 Evaluation Module 4 EVM Board Assembly Drawings and Layout Guidelines 4 1 PCB Drawings Figure 8 through Figure 11 show component placement and layout of this EVM Figure 8 LM74700EVM Top Side Placement ...

Page 8: ... and Layout Guidelines www ti com 8 SNOU153A October 2017 Revised February 2019 Submit Documentation Feedback Copyright 2017 2019 Texas Instruments Incorporated LM74700 Evaluation Module Figure 9 LM74700EVM Bottom Side Placement ...

Page 9: ...mbly Drawings and Layout Guidelines 9 SNOU153A October 2017 Revised February 2019 Submit Documentation Feedback Copyright 2017 2019 Texas Instruments Incorporated LM74700 Evaluation Module Figure 10 LM74700EVM Top Layer Routing ...

Page 10: ... and Layout Guidelines www ti com 10 SNOU153A October 2017 Revised February 2019 Submit Documentation Feedback Copyright 2017 2019 Texas Instruments Incorporated LM74700 Evaluation Module Figure 11 LM74700EVM Bottom Layer Routing ...

Page 11: ...015 4 Keystone Testpoint_Keystone_ Miniature Fitted TEST POINT SLOTTED 118 TH GND1 GND2 1040 2 Keystone Test point TH Slot Test point Fitted Machine Screw Round 4 40 x 1 4 Nylon Philips panhead H1 H2 H3 H4 NY PMS 440 0025 PH 4 B F Fastener Supply Screw Fitted Standoff Hex 0 5 L 4 40 Nylon H5 H6 H7 H8 1902C 4 Keystone Standoff Fitted Standard Banana Jack Uninsulated 8 9mm J1 J2 J3 J4 575 8 4 Keysto...

Page 12: ...Instruments Incorporated Revision History Revision History Changes from Original October 2017 to A Revision Page Changed from TI s smart diode controller to ideal diode controller 2 Updated Figure 2 3 Changed connectors from VINA to VIN 3 Changed connectors from VOUTA to VOUT 3 Updated Figure 3 4 Updated Bill of Materials table 11 ...

Page 13: ...other than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Page 14: ... These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation...

Page 15: ...y for convenience and should be verified by User 1 Use EVMs in a shielded room or any other test facility as defined in the notification 173 issued by Ministry of Internal Affairs and Communications on March 28 2006 based on Sub section 1 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Page 16: ... any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Page 17: ...OR DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Page 18: ...se resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for...

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