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User’s Guide

LM7480-Q1 Evaluation Module for Unsuppressed Load
Dump Protection: LM74800EVM-CS

ABSTRACT

This user’s guide describes the LM74800EVM-CS Evaluation Module for evaluating the performance of Ideal
Diode Controller with Switched Output LM74800-Q1 and LM74801-Q1. The LM7480x-Q1 ideal diode controller
drives and controls external back to back N-Channel MOSFETs to emulate an ideal diode rectifier with power
path ON/OFF control and over voltage protection.

Table of Contents

1 Introduction

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1

2 Description

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2

3 Schematic

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4

4 Test Equipment Requirements

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5

5 Test Setup and Results

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5

6 Board Layout and Bill of Materials

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9

Revision History

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14

Trademarks

All trademarks are the property of their respective owners.

1 Introduction

TI's LM74800 Evaluation Module LM74800EVM-CS helps designers evaluate the operation and performance of
the LM74800-Q1 ideal diode controller with switched output.The LM7480x-Q1 ideal diode controller drives and
controls external back-to-back N-Channel MOSFETs to emulate an ideal diode rectifier with power path ON/OFF
control and overvoltage protection. This evaluation module demonstrates how LM74800-Q1 along with two back-
to-back N-Channel MOSFETs configured in common-source topology can provide 200-V unsuppressed load
dump protection with reverse battery protection to the downstream circuit. The first gate drive HGATE controls
an external N-channel MOSFET to turn off or clamp output voltage to acceptable safe level and the second gate
drive DGATE controls another external N-Channel MOSFET to emulate an ideal diode.

1.1 Features

Key features of the EVM include:

• 12-V and 24-V automotive reverse battery protection
• Input operating range 3 V to 65 V
• 12-V battery protection 3 V to 40 V
• 24-V battery protection 3 V to 65 V
• 2-A Nominal, 2.5-A peak load current
• Supports 200-V unsuppressed load dump protection
• Enable ON/OFF control
• Programmable over voltage cutoff and output clamp operation
• Output voltage slew rate control
• LED Indication for Output ON/OFF detection
• On board TVS protection for automotive transient immunity

www.ti.com

Table of Contents

SLVUBU4 – MARCH 2021

Submit Document Feedback

LM7480-Q1 Evaluation Module for Unsuppressed Load Dump Protection:

LM74800EVM-CS

1

Copyright © 2021 Texas Instruments Incorporated

Содержание LM7480-Q1

Страница 1: ...th power path ON OFF control and overvoltage protection This evaluation module demonstrates how LM74800 Q1 along with two back to back N Channel MOSFETs configured in common source topology can provide 200 V unsuppressed load dump protection with reverse battery protection to the downstream circuit The first gate drive HGATE controls an external N channel MOSFET to turn off or clamp output voltage...

Страница 2: ... Q1 Q3 and Q2 Q1 and Q2 are 200 V and 60 V rated N Channel MOSFETs respectively which are capable of supporting 2 A load current for automotive applications Since the MOSFETs are connected back to back in common source topology they can support 200 V unsuppressed load dump protection reverse battery protection reverse current blocking and can provide power path cut off when disabled or during over...

Страница 3: ...m the EVM VA Common source point of Q1 and Q2 MOSFETs and A pin of LM7480x Q1 DGATE Output of Ideal Diode MOSFET Gate Control HGATE Output of Hot Swap MOSFET Gate Control GND1 GND 2 GND3 and GND4 Test Point for EVM Ground Table 2 3 Jumpers and LED Description Jumpers Description J5 EN UVLO Control 1 2 Enables by connecting to VIN 2 3 Disables by connecting to GND J6 OVP Setting 1 2 OVP set to Outp...

Страница 4: ...1 2 D5 12k R5 1 2 3 J6 VIN VOUT GND4 TP10 5 4 1 2 3 Q2 1 3 2 200V Q1 33V D1 150V D2 1µF C2 47k R8 56k R3 GND1 TP7 0 015uF C10 D6 VIN TP1 100 R2 10nF C4 GND2 TP8 47uF C8 DGATE TP4 HGATE TP3 VS TP5 VA TP6 NT1 Unsuppressed Load Dump 200V 56V D4 10k R7 DNP VIN VOUT 1 3 2 Q3 DNP 10k R1 0 R9 1µF 50V C1 70V D3 DNP Figure 3 1 LM74800EVM CS Schematic Schematic www ti com 4 LM7480 Q1 Evaluation Module for U...

Страница 5: ...ve load or equivalent which can tolerate up to 10 A DC load at 12 V 5 Test Setup and Results This sections describes the test procedure for LM74800 Q1 device Similar procedure applies for LM74801 Q1 device also Default jumper setting for LM74800EVM CS board is shown in Figure 5 1 Table 5 1 Default Jumper Setting for LM74800EVM CS J5 J6 J7 1 2 or connect 2 to external enable control 2 3 OVP to Inpu...

Страница 6: ...wer Up To verify the startup behavior connect the oscilloscope to the evaluation module Channel 1 Input Voltage Test Point Label VIN Channel 2 A pin Voltage Test Point Label VA Channel 3 DGATE Voltage Test Point Label DGATE Channel 4 HGATE Voltage Test Point Label HGATE Set the load to 200 mA trigger to Channel 1 rising and turn ON the power supply Start up behavior of LM74800EVM CS is captured in...

Страница 7: ...TE 5 3 200 V Unsuppressed Load Dump Protection Figure 5 6 Unsuppressed Load Dump 200 V Output Clamp Figure 5 7 Unsuppressed Load Dump 200 V Output Cut off www ti com Test Setup and Results SLVUBU4 MARCH 2021 Submit Document Feedback LM7480 Q1 Evaluation Module for Unsuppressed Load Dump Protection LM74800EVM CS 7 Copyright 2021 Texas Instruments Incorporated ...

Страница 8: ...e 5 8 ISO 7637 2 Pulse 1 600 V 50 Ω Test Setup and Results www ti com 8 LM7480 Q1 Evaluation Module for Unsuppressed Load Dump Protection LM74800EVM CS SLVUBU4 MARCH 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 9: ...OP Figure 6 2 Component Placement BOTTOM Figure 6 3 TOP Layer Routing www ti com Board Layout and Bill of Materials SLVUBU4 MARCH 2021 Submit Document Feedback LM7480 Q1 Evaluation Module for Unsuppressed Load Dump Protection LM74800EVM CS 9 Copyright 2021 Texas Instruments Incorporated ...

Страница 10: ...Routing Board Layout and Bill of Materials www ti com 10 LM7480 Q1 Evaluation Module for Unsuppressed Load Dump Protection LM74800EVM CS SLVUBU4 MARCH 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 11: ...1 60AA TDK C8 1 47 uF CAP AL 47 uF 63 V 20 0 65 ohm AEC Q200 Grade 2 SMD SMT Radial F EEE FK1J470P Panasonic C10 1 0 015 uF CAP CERM 0 015 uF 100 V 10 X7R AEC Q200 Grade 1 0603 0603 CGA3E2X7R2A153K0 80AA TDK D1 1 33 V Diode TVS Bi 33 V SMB SMB SMBJ33CA 13 F Diodes Inc D2 1 150 V Diode TVS Uni 150 V 243 Vc SMB SMB SMBJ150A 13 F Diodes Inc D4 1 56 V Diode Zener 56 V 500 mW AEC Q101 SOD 123 SOD 123 M...

Страница 12: ... SOT669 BUK7Y4R8 60EX Nexperia None R1 1 10 k RES 10 k 5 0 25 W AEC Q200 Grade 0 1206 1206 CRCW120610K0JNE A Vishay Dale R2 1 100 RES 100 5 0 1 W AEC Q200 Grade 0 0603 0603 CRCW0603100RJNE A Vishay Dale R3 1 56 k RES 56 k 5 0 1 W AEC Q200 Grade 0 0603 0603 CRCW060356K0JNE A Vishay Dale R4 1 3 48 k RES 3 48 k 1 0 1 W AEC Q200 Grade 0 0603 0603 CRCW06033K48FKE A Vishay Dale R5 1 12 k RES 12 k 5 0 1 ...

Страница 13: ...ystone U1 1 Ideal Diode Controller with Load Dump Protection DRR0012E WSON 12 DRR0012E PLM74800DRRRQ1 Texas Instruments Texas Instruments D3 0 70 V Diode Schottky 70 V 1 A SMA SMA B170 13 F Diodes Inc FID1 FID2 FID3 FID4 FID5 FID6 0 Fiducial mark There is nothing to buy or mount N A N A N A Q3 0 150 V MOSFET N CH 150 V 33 A AEC Q101 DPAK DPAK AUIRFR4615TRL International Rectifier None R7 0 10 k RE...

Страница 14: ... numbers in the current version DATE REVISION NOTES March 2021 Initial release Revision History www ti com 14 LM7480 Q1 Evaluation Module for Unsuppressed Load Dump Protection LM74800EVM CS SLVUBU4 MARCH 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 15: ...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...

Страница 16: ... 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...

Страница 17: ...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...

Страница 18: ... 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...

Страница 19: ...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...

Страница 20: ...s 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 and you wi...

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