LM74800EVM-CD

Table of Contents www.ti.com User’s Guide LM74800 Evaluation Module: LM74800EVM-CD ABSTRACT This user’s guide describes the LM74800EVM-CD 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.............................................................................................................................................................................1 2 Description.............................................................................................................................................................................. 2 3 Schematic................................................................................................................................................................................4 4 Test Equipment Requirements.............................................................................................................................................. 5 5 Test Setup and Results.......................................................................................................................................................... 5 6 Board Layout and Bill of Materials......................................................................................................................................10 7 Revision History................................................................................................................................................................... 17 Trademarks All other trademarks are the property of their respective owners. 1 Introduction TI's LM74800 Evaluation Module LM74800EVM-CD helps designers evaluate the operation and performance of the LM74800-Q1 ideal diode controller with switched output. This evaluation module demonstrates how LM74800-Q1 controls two N-channel power MOSFETs with ideal diode MOSFET connected first followed by second MOSFET for switched output and power path cut-off. LM74800-Q1 is a dual gate drive Ideal diode controller where the first gate drive DGATE controls an external N-channel MOSFET to emulate an ideal diode and the second gate drive HGATE controls another external N-Channel MOSFET to cutoff the power path when disabled or during an over voltage condition. Second MOSFET is can also be used to clamp the output during over voltage or load dump conditions. Note For Class A performance during input micro-short test LV124 E-10, it is recommended to connect EN/ UVLO, J5 pin 2 to J10 pin 1 or an external control using J5 pin 2. 1.1 Features Key features of the EVM include • • • • • • • • • 12-V and 24-V automotive reverse battery protection Input operating range 3 V to 40 V, extendable to 65 V 12-V battery protection 3 V to 40 V 24-V battery protection 3 V to 65 V 5-A maximum load current with option for 10-A operation Switched output for power path cutoff or clamp Enable ON/OFF control Programmable over voltage cutoff and output clamp operation Output voltage slew rate control SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback LM74800 Evaluation Module: LM74800EVM-CD Copyright © 2020 Texas Instruments Incorporated 1 www.ti.com Introduction • • LED Indication for Output ON/OFF detection On board TVS protection for automotive transient immunity 1.2 Applications • • • • • • Automotive reverse battery protection ADAS Domain Controller Camera ECU Head Unit USB HUBs Power path protection, Power Mux and ORing 2 Description The LM74800EVM-CD is configured by default for evaluating 12-V automotive reverse battery protection with switched output to disconnect power path or clamp the output. On board options are provided for evaluating 24V battery protection. 2.1 Input Power and Load (J1/J3 and J2/J4): Input power is applied at the terminals J1 and J3. Terminals J2 and J4 provide output connection to load. 2.2 Enable Control (J5): Enable control is usually used by external MCU or controller to turn off LM7480x-Q1 and cut off the power path. External input is recommended to be connected to jumper J5 pin 2. Otherwise setting 1-2 on J5 enables the controller and 2-3 disables the controller. It is recommended to connect EN to external MCU or to test point labeled "VOUT_ALWAYS_ON" for uninterrupted performance during negative transient tests. 2.3 Over Voltage Protection (J6): Over voltage protection is configured through jumper J6. Setting 2-3 on J6 configures OVP protection to the input side. OVP rising threshold is set to 37.5 V with 2-3 setting on J6 and falling is set to 34.5 V. Setting 1-2 on J6 configures OV clamp operation. This provides output voltage to clamp (hysteretic ON/OFF output). 2.4 Input Voltage Monitor (J8 and VIN_MON): Input Voltage monitor setting is done through test point labeled VIN_MON and J8 allows monitoring input voltage under different conditions. Setting J8 to 1-2 provides option to monitor battery voltage; this allows monitoring input voltage during normal and reversed battery conditions as well. Setting J8 to 2-3 allows monitoring only during the normal positive battery conditions only. 2.5 Two back-back connected MOSFETs (Q1/Q3 and Q2/Q4): Q1 is a 60-V rated Dual N-Channel MOSFETs capable to support 5-A automotive ECU applications. Since is a Dual Channel back to back connected N-Channel MOSFET, it can support reverse battery protection, reversecurrent blocking and can provides power path cut-off when disabled or during over voltage conditions. Options Q3 and Q4 are provided for extending current to 10 A and can be used to validate other MOSFETs. 2.6 Output slew rate control (R2 and C2): R2 and C2 provide output slew rate control and can be changed to achieve different output slew rate. 2.7 Output Schottky Diode (D2) and LED indication: Schottky Diode D2 is not populated on EVM by default and it is recommended where output voltage can have negative transients that can exceed absolute maximum ratings of LM7480x-Q1. D5 provides an indication on the status of the output voltage. 2 LM74800 Evaluation Module: LM74800EVM-CD SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated www.ti.com Description 2.8 TVS selection for 12-V battery protection: TVS D1 SMBJ33CA is a bidirectional 600W TVS that protects the LM74800-Q1 and MOSFETs from automotive ISO transients tests on a 12-V battery. For detailed information on TVS selection, refer to the datasheet of LM74800-Q1. 2.9 TVS selection for 24-V battery protection: For 24-V battery protection application, D1 needs to be removed and D3 along with D4 need to be mounted. Further 80-V rated MOSFETs are recommended for 24-V battery protection applications. For detailed information on TVS selection, refer to the datasheet of LM74800-Q1. 2.10 Test Points: Test point labeled DGATE is used for monitoring gate voltage of Q1A and HGATE is used for gate voltage of Q1B. Test Point labelled VIN measures input voltage, VOUT measure output voltage. Test Point labelled VOUT_ALWAYS_ON measures the drain voltage of Q1 MOSFET. Test Points GND1, GND3 and GND4 provides access to the input GND voltage and GND2 provides access to the LM74800-Q1 GND pin. Table 2-1. Connectors: Input and Output Connector Description J1 Power input connector to the positive rail of the input power supply J3 Ground connection for the power supply J2 Power output connector to the positive side of the load J4 Ground connection for the load Table 2-2. Test Points Description Test Points Description VIN Input power supply to the EVM VOUT Output from the EVM VOUT_ALWAYS_ON Output voltage after the Ideal Diode MOSFET for connecting always ON loads VIN_MON Input monitoring for battery inputs 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 Output Clamp (hysteretic) at 37.5 V 2-3 OVP set to Input OVP Cutoff at 37.5 V J7 J8 Enables LED indication for output • • Input Voltage Sense 1-2 Input Voltage Sense after Ideal Diode MOSFET 2-3 Input Voltage Sense directly on input supply SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback LM74800 Evaluation Module: LM74800EVM-CD Copyright © 2020 Texas Instruments Incorporated 3 Schematic www.ti.com 3 Schematic VOUT_ALWA YS_ON TP9 Q2 3 Q3 4 4 3 VOUT TP8 2 VIN TP7 1 DNP 1 DNP J1 J2 Q1B 1 TP1 7-8 5-6 3 Q1A 4 J7 100nF C1 R6 100k DGATE R1 0 1 2 100 PEC02SAAN R2 DNP 1 2 3 D3 R7 0 AGND U1 58V D1 TP10 VIN_MON R3 33V VS OUT OV A DGATE C 4 SW HGATE 3 VSNS 5 91k D4 C5 DNP 0.1uF 24V J8 3 2 1 3.48k R4 J5 GND1 TP3 1 2 3 R10 J3 10 CAP 6 EN/UVLO 0 R5 12k AGND VS R8 9.1k HGATE TP2 VOUT = 3V to 37.5V 5A Max Current 9 C6 2.2uF 2 1 12 R9 0 D2 70V C7 47uF 1 VIN = 3V to 40V 5A Max Current C4 0.1uF C2 10nF C3 100nF 8 D5 11 PAD 13 GND 7 GND2 TP6 GND3 TP4 2 J6 Green GND4 TP5 J4 PLM74800DRRRQ1 SGND AGND AGND AGND SGND Figure 3-1. LM74800EVM-CD Schematic 4 LM74800 Evaluation Module: LM74800EVM-CD SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated www.ti.com Test Equipment Requirements 4 Test Equipment Requirements 4.1 Power Supplies One adjustable power supply 0-V to 40-V output, 0-A to 10-A output current limit. 4.2 Meters One Digital Multi Meter minimum needed. 4.3 Oscilloscope A DPO2024 or equivalent, three 10x voltage probes, and a DC current probe capable of measuring 10 A. 4.4 Loads One resistive 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-CD board is shown in Figure 5-1. Table 5-1. Default Jumper Setting for LM74800EVM-CD J5 J6 J7 J8 1-2 or connect 2 to external enable control 2-3, OVP to Input 1-2, Output LED Indication 2-3, Input Voltage Sense SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback LM74800 Evaluation Module: LM74800EVM-CD Copyright © 2020 Texas Instruments Incorporated 5 www.ti.com Test Setup and Results Figure 5-1. LM74800EVM-CD Test Setup 5.1 Initial Setup Test setup used for evaluating LM74800EVM-CD is shown in Figure 5-1. Steps to be followed before testing the evaluation module are: • • • • Connect the power supply and load to LM74800EVM-CD. Set the power supply output to 12 V and current limit to 5 A. Set load to 200 mA or a load value less than 5 A. Set the jumpers to default jumper setting as shown in Table 5-1. 5.2 Power up To verify the startup behavior, connect the oscilloscope to the evaluation module: • Channel 1 - Input Voltage (Test Point Label VIN) • Channel 2 - Output Voltage (Test Point Label VOUT) • 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. Startup behavior of LM74800EVM-CD is captured in Figure 5-2. 6 LM74800 Evaluation Module: LM74800EVM-CD SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated www.ti.com Test Setup and Results Figure 5-2. Power Up: DGATE and HGATE Figure 5-3. Power Up: Charge Pump and Inrush Current Additional startup information is captured in Figure 5-3. Channel 3 captures the charge pump voltage on VCAP pin during startup. Charge pump turns on when POR threshold on VIN is reached and builds up to 13.5 V above VIN. 5.3 Over Voltage Protection Figure 5-4. Over Voltage Protection Figure 5-5. Over Voltage Recovery SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback LM74800 Evaluation Module: LM74800EVM-CD Copyright © 2020 Texas Instruments Incorporated 7 Test Setup and Results www.ti.com 5.4 Enable Control Figure 5-6. Turn ON using EN - Inrush Current Figure 5-7. Turn ON using EN - DGATE 5.5 Hot-plug and Disable using EN Figure 5-8. Hot-plug 12 V 8 Figure 5-9. Disable using EN LM74800 Evaluation Module: LM74800EVM-CD SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated Test Setup and Results www.ti.com 5.6 Inrush Current Control Figure 5-10. Inrush current with No Load Figure 5-11. Inrush current with 6-Ω Load 5.7 Load Response Figure 5-12. Load Transient Response 100 mA to 5 A SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback LM74800 Evaluation Module: LM74800EVM-CD Copyright © 2020 Texas Instruments Incorporated 9 www.ti.com Board Layout and Bill of Materials 6 Board Layout and Bill of Materials 6.1 Board Layout Figure 6-1. Component Placement TOP 10 LM74800 Evaluation Module: LM74800EVM-CD SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated Board Layout and Bill of Materials www.ti.com Figure 6-2. Component Placement BOTTOM SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback LM74800 Evaluation Module: LM74800EVM-CD Copyright © 2020 Texas Instruments Incorporated 11 www.ti.com Board Layout and Bill of Materials Figure 6-3. TOP Layer Routing 12 LM74800 Evaluation Module: LM74800EVM-CD SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated Board Layout and Bill of Materials www.ti.com Figure 6-4. BOTTOM Layer Routing SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback LM74800 Evaluation Module: LM74800EVM-CD Copyright © 2020 Texas Instruments Incorporated 13 Board Layout and Bill of Materials www.ti.com 6.2 Bill of Materials Table 6-1. Bill of Materials Fitted Description Fitted CAP, CERM, 0.1 uF, 100 V, +/- 10%, X7R, 0603 Fitted Designator Quantity Manufacturer Package Reference Value GRM188R72A104KA35J 1 MuRata 603 0.1 uF CAP, CERM, 0.01 uF, 100 V, +/- 10%, X7R, AECC2 Q200 Grade 1, 0603 CGA3E2X7R2A103K080AA 1 TDK 603 0.01 uF Fitted CAP, CERM, 0.1 uF, 25 V, +/- 10%, X7R, AEC-Q200 C3 Grade 1, 0603 CGA3E2X7R1E104K080AA 1 TDK 603 0.1 uF Fitted CAP, CERM, 0.1 uF, 100 V, +/- 10%, X7R, AECQ200 Grade 1, 1206 C4, C5 CGA5L2X7R2A104K160AA 2 TDK 1206 0.1 uF Fitted CAP, CERM, 2.2 uF, 100 V, +/- 10%, X7R, 1210 C6 C1210C225K1RACTU 1 Kemet 1210 2.2 uF Fitted CAP, AL, 47 uF, 63 V, +/20%, 0.65 ohm, AECQ200 Grade 2, SMD C7 EEE-FK1J470P 1 Panasonic SMT Radial F 47 uF Fitted Diode, TVS, Bi, 33 V, SMB D1 SMBJ33CA-13-F 1 Diodes Inc. SMB 33 V Fitted Diode, Schottky, 70 V, 1 A, SMA D2 B170-13-F 1 Diodes Inc. SMA 70 V Fitted LED, Green, SMD D5 LTST-C190GKT 1 Lite-On 1.6x0.8x0.8mm Green Fitted Standard Banana Jack, Uninsulated, 8.9mm J1, J2, J3, J4 575-8 4 Keystone Keystone575-8 Fitted Header, 100mil, 3x1, Tin, TH J5, J6, J8 PEC03SAAN 3 Sullins Connector Solutions Header, 3 PIN, 100mil, Tin Fitted Header, 100mil, 2x1, Tin, TH J7 PEC02SAAN 1 Sullins Connector Solutions Header, 2 PIN, 100mil, Tin 14 C1 PartNumber LM74800 Evaluation Module: LM74800EVM-CD Alternate Manufacturer SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated www.ti.com Board Layout and Bill of Materials Table 6-1. Bill of Materials (continued) Fitted Description Designator PartNumber Quantity Manufacturer Package Reference Value Fitted Dual N-Channel MOSFET, Q1 49 A, 60 V, 8-Pin DFN NVMFD5C650NL 1 ON DFN8_5X6 Semiconductor Fitted RES, 0, 5%, 0.063 W, R1 AEC-Q200 Grade 0, 0402 RK73Z1ETTP 1 KOA Speer 402 0 Fitted RES, 100, 5%, 0.1 W, R2 AEC-Q200 Grade 0, 0603 CRCW0603100RJNEA 1 Vishay-Dale 603 100 Fitted RES, 91 k, 5%, 0.1 W, R3 AEC-Q200 Grade 0, 0603 CRCW060391K0JNEA 1 Vishay-Dale 603 91 k Fitted RES, 3.48 k, 1%, 0.1 W, R4 AEC-Q200 Grade 0, 0603 CRCW06033K48FKEA 1 Vishay-Dale 603 3.48 k Fitted RES, 12 k, 5%, 0.1 W, R5 AEC-Q200 Grade 0, 0603 CRCW060312K0JNEA 1 Vishay-Dale 603 12 k Fitted RES, 100 k, 1%, 0.1 W, R6 AEC-Q200 Grade 0, 0603 CRCW0603100KFKEA 1 Vishay-Dale 603 100 k Fitted RES, 0, 5%, 0.1 W, AECQ200 Grade 0, 0402 ERJ-2GE0R00X 2 Panasonic 402 0 Fitted RES, 9.1 k, 5%, 0.1 W, R8 AEC-Q200 Grade 0, 0603 CRCW06039K10JNEA 1 Vishay-Dale 603 9.1 k Fitted RES, 0, 5%, 0.1 W, AECQ200 Grade 0, 0603 R10 ERJ-3GEY0R00V 1 Panasonic 603 0 Fitted Test Point, Miniature, Orange, TH TP1, TP2 5003 2 Keystone Orange Miniature Testpoint Fitted TEST POINT SLOTTED .118", TH TP3, TP4, TP5 1040 3 Keystone Test point, TH Slot Test point Fitted Test Point, Miniature, Black, TH TP6 5001 1 Keystone Black Miniature Testpoint Fitted Test Point, Miniature, SMT TP7, TP8, TP9 5015 3 Keystone Testpoint_Keystone_Miniature Fitted Test Point, Miniature, Red, TP10 TH 5000 1 Keystone Red Miniature Testpoint R7, R9 SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback Alternate Manufacturer LM74800 Evaluation Module: LM74800EVM-CD Copyright © 2020 Texas Instruments Incorporated 15 Board Layout and Bill of Materials www.ti.com Table 6-1. Bill of Materials (continued) Fitted Description Designator PartNumber Quantity Manufacturer Package Reference Value Fitted Ideal Diode Controller with Load Dump Protection, U1 DRR0012E (WSON-12) LM74800DRRRQ1 1 Texas Instruments DRR0012E Not Fitted Diode, TVS, Uni, 58 V, 93.6 Vc, SMB D3 SMBJ58A-13-F 0 Diodes Inc. SMB 58 V Not Fitted Diode, TVS, Uni, 24 V, 38.9 Vc, SMB D4 SMBJ24A-13-F 0 Diodes Inc. SMB 24 V Not Fitted Fiducial mark. There is nothing to buy or mount. FID1, FID2, FID3, FID4, FID5, FID6 N/A 0 N/A N/A Not Fitted INF-MOSFET-N-3 Q2, Q3 IPD100N06S4-03 0 Infineon PG-TO252-3 16 LM74800 Evaluation Module: LM74800EVM-CD Alternate Manufacturer Texas Instruments SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated www.ti.com Revision History 7 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (April 2020) to Revision A (October 2020) Page • Updated the numbering format for tables, figures and cross-references throughout the document...................1 • Updated Figure 3-1 ............................................................................................................................................4 • Updated Figure 5-1 ............................................................................................................................................5 • Updated Board Layout images......................................................................................................................... 10 • Updated the Bill of Materials.............................................................................................................................14 SLVUBU3A – APRIL 2020 – REVISED OCTOBER 2020 Submit Document Feedback LM74800 Evaluation Module: LM74800EVM-CD Copyright © 2020 Texas Instruments Incorporated 17 IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. 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