LM74501Q1EVM

www.ti.com Table of Contents User’s Guide LM74501-Q1EVM User's Guide ABSTRACT This user’s guide describes the evaluation module (EVM) for TI's reverse polarity protection controller, LM74501-Q1. This document provides configuration information and test setup details for evaluating LM74501-Q1 devices. An EVM schematic, board layout images, and bill of materials (BOM) are included. Table of Contents 1 Introduction.............................................................................................................................................................................2 2 Setup........................................................................................................................................................................................2 2.1 I/O Connector Description..................................................................................................................................................2 2.2 Board Setup....................................................................................................................................................................... 3 2.3 Schematic.......................................................................................................................................................................... 4 3 Operation.................................................................................................................................................................................5 3.1 LM74501-Q1EVM Performance Capture........................................................................................................................... 5 4 EVM Board Assembly Drawings and Layout Guidelines....................................................................................................7 4.1 PCB Drawings....................................................................................................................................................................7 4.2 Bill of Materials...................................................................................................................................................................9 5 Revision History....................................................................................................................................................................11 List of Figures Figure 2-1. LM74501-Q1EVM Typical Application Circuit............................................................................................................2 Figure 2-2. LM74501-Q1EVM......................................................................................................................................................3 Figure 2-3. LM74501-Q1EVM Schematic....................................................................................................................................4 Figure 3-1. LM74501-Q1EVM Startup......................................................................................................................................... 5 Figure 3-2. Startup Reverse Polarity (–12 V)...............................................................................................................................6 Figure 4-1. LM74501-Q1EVM Top Side Placement.....................................................................................................................7 Figure 4-2. LM74501-Q1EVM Bottom Side Placement............................................................................................................... 7 Figure 4-3. LM74501-Q1EVM Top Layer Routing....................................................................................................................... 8 Figure 4-4. LM74501-Q1EVM Bottom Layer Routing..................................................................................................................8 List of Tables Table 4-1. Bill of Materials............................................................................................................................................................9 Trademarks All trademarks are the property of their respective owners. SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated LM74501-Q1EVM User's Guide 1 Introduction www.ti.com 1 Introduction The LM74501-Q1 evaluation module (LM74501-Q1EVM) helps designers evaluate the operation and performance of the LM74501-Q1 reverse polarity protection controller. This evaluation module demonstrates how an N-channel power MOSFET can emulate a very-low forward voltage diode with low IQ and low-leakage current flowing through the IC. In this design scheme, the LM74501-Q1 is combined 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 2-1. For more information on the LM74501-Q1 functional and electrical characteristics, see LM74501-Q1 "TVS Less" Reverse Battery Protection Controller data sheet. 2 Setup This section describes the jumpers and connectors on the EVM, and how to properly connect, setup, and use the LM74501-Q1EVM. Ensure the power supply is turned off while making connections on the board. 2.1 I/O Connector Description VIN J1: Power input connector to the positive rail of the input power supply GND1 J3: Ground connection for the power supply VOUT J2: Power output connector to the positive side of the load GND2 J4: Ground connection for the load EN J5: Jumper to enable LM74501Q1 gate driver 1-2 position connects EN to Source, 2-3 position connects EN to GND Test Points VINA, VOUTA,GATE,ENA,BATT_MON, GND1, and GND2 are test points High Side Switch VBAT VOUT To Load CT CIN COUT SOURCE GATE DRAIN VCAP SW LM74501-Q1 EN R1 ON OFF BATT_MON GND R2 Figure 2-1. LM74501-Q1EVM Typical Application Circuit 2 LM74501-Q1EVM User's Guide SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Setup 2.2 Board Setup • • • • • Before applying power to the LM74501-Q1EVM, verify all external connections. Turn off external power supplies and connect them with the proper polarity 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 obtained. When all connections to the LM74501-Q1EVM are verified, apply power to VIN. Figure 2-2 captures EVM board setup. Figure 2-2. LM74501-Q1EVM SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated LM74501-Q1EVM User's Guide 3 Setup www.ti.com 2.3 Schematic Figure 2-3 illustrates the EVM schematic. Q2 3 4 DNP 1 SQD100N04-3M6_GE3 VINA VOUTA 3 2 1 J1 Q1 J2 5 BananaJack 4 BananaJack BUK7Y3R0-40HX CT 22nF 100V C4 0.33µF R3 0 GATE 5A max Current J5 C1 220nF 25V PEC03SAAN 2 3 6 GND1 4 SOURCE VCAP EN SW GATE DRAIN NC GND 1 2.2uF 1 ENA 47uF 7 GND2 5 LM74501QDDFQ1 BananaJack C3 8 R1 91k J3 D2 DNP SMAJ58A 58V 1 C5 0.33µF C2 U1 1 2 3 5A max Current J4 BananaJack BAT T_MON R2 9.1k SGND SGND SGND SGND Figure 2-3. LM74501-Q1EVM Schematic 4 LM74501-Q1EVM User's Guide SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Operation 3 Operation 3.1 LM74501-Q1EVM Performance Capture 3.1.1 LM74501-Q1EVM Startup • • • A startup pulse from 0 V to 12 V is applied at the input of the LM74501-Q1EVM. Figure 3-1 shows the input voltage (CH2) rises from 0 V to 12 V and the gate voltage (CH3) comes up after input voltage crosses device PoR threshold. The gate of external N-FET is fully enhanced and FET is turned on. Output voltage (CH1) rises smoothly from 0 V to 12 V. Figure 3-1. LM74501-Q1EVM Startup SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated LM74501-Q1EVM User's Guide 5 Operation www.ti.com 3.1.2 Startup Reverse Polarity (–12 V) • • • A –12-V source is connected to the VIN input of the LM74501-Q1EVM. Figure 3-2 shows that the output voltage remains at a constant 0 V in this situation. This test simulates the event of connecting a 12-V battery in the reverse direction; therefore, protecting the load from negative input voltages. Figure 3-2. Startup Reverse Polarity (–12 V) 6 LM74501-Q1EVM User's Guide SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com EVM Board Assembly Drawings and Layout Guidelines 4 EVM Board Assembly Drawings and Layout Guidelines 4.1 PCB Drawings Figure 4-1 through Figure 4-4 show component placement and layout of this EVM. Figure 4-1. LM74501-Q1EVM Top Side Placement Figure 4-2. LM74501-Q1EVM Bottom Side Placement SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated LM74501-Q1EVM User's Guide 7 EVM Board Assembly Drawings and Layout Guidelines www.ti.com Figure 4-3. LM74501-Q1EVM Top Layer Routing Figure 4-4. LM74501-Q1EVM Bottom Layer Routing 8 LM74501-Q1EVM User's Guide SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com EVM Board Assembly Drawings and Layout Guidelines 4.2 Bill of Materials Table 4-1 lists the LM74501-Q1EVM BOM. Table 4-1. Bill of Materials Designator Quantity !PCB 1 Value Description Package Reference Printed Circuit Board BATT_MON, 5 ENA, GATE, VINA, VOUTA Test Point, Miniature, SMT Part Number Manufacturer PSIL135 Any Testpoint_Keystone_Miniatu 5015 re Keystone C1 1 0.1uF CAP, CERM, 0603 0.1 uF, 25 V, +/- 10%, X7R, AEC-Q200 Grade 1, 0603 CGA3E2X7R1E104K080A A C2 1 2.2uF CAP, CERM, 2.2 uF, 100 V, +/- 10%, X7R, AEC-Q200 Grade 1, CGA6N3X7R2A225K230A TDK B C3 1 47uF CAP, AL, 47 D8xL10.2mm uF, 63 V, +/20%, AECQ200 Grade 2, SMD EEE-HA1J470UP Panasonic C4, C5 2 0.33uF CAP, CERM, 1206 0.33 µF, 50 V,+/- 10%, X8R, AECQ200 Grade 0, 1206 CGA5L2X8R1H334K160A A TDK CT 1 0.022uF CAP, CERM, 0603 0.022 uF, 100 V, +/- 10%, X7R, AECQ200 Grade 1, 0603 CGA3E2X7R2A223K080A A TDK GND1, GND2 2 TEST POINT SLOTTED .11 8", TH H1, H2, H3, H4 4 Machine Screw Screw, Round, #4-40 x 1/4, Nylon, Philips panhead NY PMS 440 0025 PH B&F Fastener Supply H5, H6, H7, H8 4 Standoff, Hex, Standoff 0.5"L #4-40 Nylon 1902C Keystone J1, J2, J3, J4 4 Standard Banana Jack, Uninsulated, 8.9mm 575-8 Keystone Test point, TH Slot Test point 1040 Keystone575-8 SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated TDK Keystone LM74501-Q1EVM User's Guide 9 EVM Board Assembly Drawings and Layout Guidelines www.ti.com Table 4-1. Bill of Materials (continued) Designator Quantity J5 LBL1 Value Description Package Reference Part Number Manufacturer 1 Header, 100mil, 3x1, Tin, TH Header, 3 PIN, 100mil, Tin PEC03SAAN Sullins Connector Solutions 1 Thermal PCB Label 0.650 x 0.200 Transfer inch Printable Labels, 0.650" W x 0.200" H - THT-14-423-10 Brady N-Channel SOT669 40V 120A (Ta) 172W (Ta) Surface Mount LFPAK56, Power-SO8 BUK7Y3R0-40HX Nexperia 10,000 per roll Q1 1 R1 1 91k RES, 91 k, 0603 5%, 0.1 W, AEC-Q200 Grade 0, 0603 CRCW060391K0JNEA Vishay-Dale R2 1 9.1k RES, 9.1 k, 0603 5%, 0.1 W, AEC-Q200 Grade 0, 0603 CRCW06039K10JNEA Vishay-Dale R3 1 0 RES, 0, 5%, 0.1 W, 0603 ERJ-3GEY0R00V Panasonic SH-J1 1 1x2 Shunt, 100mil, Closed Top 100mil Shunt Flash Gold, Black SPC02SYAN Sullins Connector Solutions U1 1 Low IQ SOT23-8 Reverse Battery Protection Controller with Integrated VDS Clamp LM74501QDDFQ1 Texas Instruments D2 0 Diode, TVS, Uni, 58 V, SMA SMAJ58A Diodes Inc. FID1, FID2, FID3, FID4, FID5, FID6 0 Fiducial mark. N/A There is nothing to buy or mount. N/A N/A Q2 0 N-Channel TO-252 40V 100A (Tc) 136W (Tc) Surface Mount TO-252AA SQD100N04-3M6_GE3 Vishay 10 58V LM74501-Q1EVM User's Guide 0603 SMA SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Revision History 5 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (May 2021) to Revision A (September 2021) Page • Updated Figure 2-2 ............................................................................................................................................3 • Updated Figure 2-3 ............................................................................................................................................4 • Updated Figure 4-1 through Figure 4-4 ............................................................................................................. 7 • Updated Table 4-1 ............................................................................................................................................. 9 SNOU179A – MAY 2021 – REVISED SEPTEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated LM74501-Q1EVM User's Guide 11 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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