SNOU191 January   2022 LM74502-Q1 , LM74502H-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Description
    1. 2.1 Input Power and Load (J1/J5 and J2/J6, J7/J11 and J8/J12)
    2. 2.2 Two Back-to-Back Connected MOSFETs (Q1/Q2–Q3/Q4 and Q6/Q7–Q8/Q9)
    3. 2.3 Output Slew Rate Control (R1 and C1)
    4. 2.4 Output Schottky Diode (D4, D10) and LED Indication (D6, D12)
    5. 2.5 Test Points
  4. 3Schematic
  5. 4Test Equipment Requirements
    1. 4.1 Power Supplies
    2. 4.2 Meters
    3. 4.3 Oscilloscope
    4. 4.4 Loads
  6. 5Test Setup and Results
    1. 5.1 Initial Setup
    2. 5.2 Power Up
    3. 5.3 Turn-ON with EN
    4. 5.4 Inrush Current Control
    5. 5.5 Overvoltage Response
    6. 5.6 Reverse Polarity Protection
  7. 6Board Layout and Bill of Materials
    1. 6.1 Board Layout
    2. 6.2 Bill of Materials

6.2 Bill of Materials

Table 6-1 Bill of Materials
DesignatorQuantityValueDescriptionPackage ReferencePart NumberManufacturer
C110.01 uFCAP, CERM, 0.01 uF, 100 V, +/- 10%, X7R, AEC-Q200 Grade 1, 0603603CGA3E2X7R2A103K080AATDK
C2, C620.1 uFCAP, CERM, 0.1 µF, 100 V,+/- 10%, X7R, AEC-Q200 Grade 1, 0603603HMK107B7104KAHTTaiyo Yuden
C31100 uFCAP, AL, 100 uF, 80V, +/- 20%, 320mohm, SMD

Radial, Can-SMD

EEE-FK1K101AV

Panasonic
C4, C1320.1 uFCAP, CERM, 0.1 uF, 25 V, +/- 10%, X7R, AEC-Q200 Grade 1, 0603603CGA3E2X7R1E104K080AATDK
C5, C1422.2 uFCAP, CERM, 2.2 uF, 100 V, +/- 10%, X7R, 12101210C1210C225K1RACTUKemet
C914.7 uFCAP, CERM, 4.7 µF, 100 V,+/- 10%, X7S, AEC-Q200 Grade 1, 12101210GCM32DC72A475KE02LMuRata
C11, C12210 uFCAP, CERM, 10 µF, 50 V,+/- 10%, X7R, AEC-Q200 Grade 1, 6x5mm6x5mmC2220C106K5R1CAUTOKemet
D3133 VDiode, TVS, Bi, 33 V, SMBSMBSMBJ33CA-13-FDiodes Inc.
D6, D122GreenLED, Green, SMD1.6x0.8x0.8mmLTST-C190GKTLite-On
FID4, FID5, FID63Fiducial mark. There is nothing to buy or mount.N/AN/AN/A
H1, H2, H3, H44Machine Screw, Round, #4-40 x 1/4, Nylon, Philips panheadScrewNY PMS 440 0025 PHB&F Fastener Supply
H5, H6, H7, H84Standoff, Hex, 0.5"L #4-40 NylonStandoff1902CKeystone
J1, J2, J5, J6, J7, J8, J11, J128Standard Banana Jack, Uninsulated, 8.9mmKeystone575-8575-8Keystone
J3, J92Header, 100mil, 2x1, Tin, THHeader, 2 PIN, 100mil, TinPEC02SAANSullins Connector Solutions
J4, J102Header, 100mil, 3x1, Tin, THHeader, 3 PIN, 100mil, TinPEC03SAANSullins Connector Solutions
LBL11Thermal Transfer Printable Labels, 0.650" W x 0.200" H - 10,000 per rollPCB Label 0.650 x 0.200 inchTHT-14-423-10Brady
Q3, Q4, Q8360 V

MOSFET, N-CH, 60 V, 100 A, AEC-Q101, DFN5 5x6mm

DFN5 5x6mm

DMNH6012SPSQ-13

Vishay-Siliconix
R11100RES, 100, 5%, 0.1 W, AEC-Q200 Grade 0, 0603603CRCW0603100RJNEAVishay-Dale
R210RES, 0, 5%, 0.25 W, AEC-Q200 Grade 0, 12061206RCA12060000ZSEAVishay-Dale
R4, R11212 kRES, 12 k, 5%, 0.1 W, AEC-Q200 Grade 0, 0603603CRCW060312K0JNEAVishay-Dale
R6, R12, R16, R1840RES, 0, 5%, 0.1 W, AEC-Q200 Grade 0, 0603603CRCW06030000Z0EAVishay-Dale
R7, R132100 kRES, 100 k, 0.5%, 0.1 W, AEC-Q200 Grade 0, 0603603CRCW0603100KDHEAPVishay-Dale
R9, R1523.48 kRES, 3.48 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603603CRCW06033K48FKEAVishay-Dale
R1710RES, 0, 5%, 1.5 W, AEC-Q200 Grade 0, 25122512CRCW25120000Z0EGHPVishay-Dale
SH-J1, SH-J2, SH-J3, SH-J441x2Shunt, 100mil, Flash Gold, BlackClosed Top 100mil ShuntSPC02SYANSullins Connector Solutions
TP1, TP2, TP3, TP4, TP9, TP10, TP11, TP128TEST POINT SLOTTED .118", THTest point, TH Slot Test point1040Keystone
TP5, TP6, TP7, TP8, TP13, TP14, TP15, TP168Test Point, Miniature, Orange, THOrange Miniature Testpoint5003Keystone
U11Reverse Polarity Protection Controller with Over Voltage ProtectionSOT23-8LM74502-Q1Texas Instruments
U21Reverse Polarity Protection Controller with Over Voltage ProtectionSOT23-8LM74502H-Q1Texas Instruments
C700.1 uFCAP, CERM, 0.1 uF, 100 V, +/- 10%, X7R, AEC-Q200 Grade 1, 12061206CGA5L2X7R2A104K160AATDK
C1004.7 uFCAP, CERM, 4.7 µF, 100 V,+/- 10%, X7S, AEC-Q200 Grade 1, 12101210GCM32DC72A475KE02LMuRata
D10100 VDiode, Schottky, 100 V, 0.15 A, SOD-123SOD-123BAT46W-7-FDiodes Inc.
D2, D8058 VDiode, TVS, Uni, 58 V, 93.6 Vc, SMBSMBSMBJ58A-13-FDiodes Inc.
D4, D10070 VDiode, Schottky, 70 V, 1 A, SMASMAB170-13-FDiodes Inc.
D5, D11024 VDiode, TVS, Uni, 24 V, 38.9 Vc, SMBSMBSMBJ24A-13-FDiodes Inc.
D7056 VDiode, Zener, 56 V, 500 mW, AEC-Q101, SOD-123SOD-123MMSZ5263BT1GON Semiconductor
D9033 VDiode, TVS, Bi, 33 V, SMBSMBSMBJ33CA-13-FDiodes Inc.
D13, D14018 VDiode, Zener, 18 V, 500 mW, SOD-123SOD-123DDZ18C-7Diodes Inc.
FID1, FID2, FID30Fiducial mark. There is nothing to buy or mount.N/AN/AN/A
Q1, Q2, Q6, Q7, Q9060 V

MOSFET, N-CH, 60 V, 100 A, AEC-Q101, DFN5 5x6mm

DFN5 5x6mm

DMNH6012SPSQ-13

Vishay-Siliconix
Q5040 VTransistor, NPN, 40 V, 0.2 A, SOT-23SOT-23MMBT3904Fairchild Semiconductor
R5010.0 kRES, 10.0 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603603RMCF0603FT10K0Stackpole Electronics Inc
R8, R1400RES, 0, 5%, 0.1 W, AEC-Q200 Grade 0, 0603603CRCW06030000Z0EAVishay-Dale