SLVUBU5A May   2020  – December 2020 LM7481-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Description
    1. 2.1  Input Power and Load (J1/J3 and J2/J4):
    2. 2.2  Enable Control (J5):
    3. 2.3  Over Voltage Protection (J6):
    4. 2.4  Input Voltage Monitor (J10 and VIN_MON):
    5. 2.5  Two Back-Back Connected MOSFETs (Q1/Q3 and Q2/Q4):
    6. 2.6  Output Slew Rate Control (R2 and C4):
    7. 2.7  Output Schottky Diode (D2) and LED Indication:
    8. 2.8  TVS Selection for 12-V Battery Protection:
    9. 2.9  TVS Selection for 24-V Battery Protection:
    10. 2.10 RC Input Snubber Option (R7 and C15):
    11. 2.11 Optional LC Filter at the Output (L2 and C11):
    12. 2.12 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 Over Voltage Protection
    4. 5.4 Enable Control
    5. 5.5 Input Reverse Polarity
    6. 5.6 Load Transient Response
  7. 6EVM Board Layout and Bill of Materials
    1. 6.1 EVM Board Layout
    2. 6.2 Bill of Materials
  8. 7Revision History

Bill of Materials

Table 6-1 Bill of Materials

Designator

Quantity

Value

Description

PackageReference

PartNumber

Manufacturer

!PCB1

1

Printed Circuit Board

PSIL108

Any

C2

1

0.1 uF

CAP, CERM, 0.1 uF, 100 V, +/- 10%, X7R, 0603

0603

GRM188R72A104KA35J

MuRata

C3

1

0.1 uF

CAP, CERM, 0.1 uF, 25 V, +/- 10%, X7R, AEC-Q200 Grade 1, 0603

0603

CGA3E2X7R1E104K080AA

TDK

C4

1

0.01 uF

CAP, CERM, 0.01 uF, 100 V, +/- 10%, X7R, AEC-Q200 Grade 1, 0603

0603

CGA3E2X7R2A103K080AA

TDK

C5

1

2.2 uF

CAP, CERM, 2.2 uF, 100 V, +/- 10%, X7R, 1210

1210

C1210C225K1RACTU

Kemet

C6, C7

2

0.33 uF

CAP, CERM, 0.33 µF, 50 V,+/- 10%, X8R, AEC-Q200 Grade 0, 1206

1206

CGA5L2X8R1H334K160AA

TDK

C10

1

47 uF

CAP, AL, 47 uF, 63 V, +/- 20%, 0.65 ohm, AEC-Q200 Grade 2, SMD

SMT Radial F

EEE-FK1J470P

Panasonic

C13

1

0.015 uF

CAP, CERM, 0.015 uF, 100 V, +/- 10%, X7R, AEC-Q200 Grade 1, 0603

0603

CGA3E2X7R2A153K080AA

TDK

C15

1

1 uF

CAP, CERM, 1 uF, 100 V, +/- 10%, X7R, AEC-Q200 Grade 1, 1206

1206

GCM31CR72A105KA03

MuRata

D1

1

33 V

Diode, TVS, Bi, 33 V, SMB

SMB

SMBJ33CA-13-F

Diodes Inc.

D2

1

70 V

Diode, Schottky, 70 V, 1 A, SMA

SMA

B170-13-F

Diodes Inc.

D5

1

Green

LED, Green, SMD

1.6x0.8x0.8mm

LTST-C190GKT

Lite-On

DGATE, HGATE

2

Test Point, Miniature, Orange, TH

Orange Miniature Testpoint

5003

Keystone

GND1, GND3, GND4

3

TEST POINT SLOTTED .118", TH

Test point, TH Slot Test point

1040

Keystone

GND2

1

Test Point, Miniature, Black, TH

Black Miniature Testpoint

5001

Keystone

H1, H2, H3, H4

4

Machine Screw, Round, #4-40 x 1/4, Nylon, Philips panhead

Screw

NY PMS 440 0025 PH

B&F Fastener Supply

H5, H6, H7, H8

4

Standoff, Hex, 0.5"L #4-40 Nylon

Standoff

1902C

Keystone

J1, J2, J3, J4, J9

5

Standard Banana Jack, Uninsulated, 8.9mm

Keystone575-8

575-8

Keystone

J5, J6, J10

3

Header, 100mil, 3x1, Tin, TH

Header, 3 PIN, 100 mil, Tin

PEC03SAAN

Sullins Connector Solutions

J7

1

Header, 100mil, 2x1, Tin, TH

Header, 2 PIN, 100 mil, Tin

PEC02SAAN

Sullins Connector Solutions

Q1, Q2

2

N-channel 40 V, 0.9 mΩ logic level MOSFET in LFPAK56E

SOT1023

BUK9J0R9-40H

Nexperia

R1

1

0

RES, 0, 5%, 0.063 W, AEC-Q200 Grade 0, 0402

0402

RK73Z1ETTP

KOA Speer

R2

1

100

RES, 100, 5%, 0.1 W, AEC-Q200 Grade 0, 0603

0603

CRCW0603100RJNEA

Vishay-Dale

R3

1

91 k

RES, 91 k, 5%, 0.1 W, AEC-Q200 Grade 0, 0603

0603

CRCW060391K0JNEA

Vishay-Dale

R4

1

3.48 k

RES, 3.48 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603

0603

CRCW06033K48FKEA

Vishay-Dale

R5

1

12 k

RES, 12 k, 5%, 0.1 W, AEC-Q200 Grade 0, 0603

0603

CRCW060312K0JNEA

Vishay-Dale

R6

1

100 k

RES, 100 k, 1%, 0.1 W, AEC-Q200 Grade 0, 0603

0603

CRCW0603100KFKEA

Vishay-Dale

R7

1

200

RES, 200, 5%, 0.25 W, AEC-Q200 Grade 0, 1206

1206

CRCW1206200RJNEA

Vishay-Dale

R8

1

9.1 k

RES, 9.1 k, 5%, 0.1 W, AEC-Q200 Grade 0, 0603

0603

CRCW06039K10JNEA

Vishay-Dale

U1

1

Ideal Diode Controller with Load Dump Protection, DRR0012E (WSON-12)

DRR0012E

PLM74810DRRRQ1

Texas Instruments

VIN, VOUT, VOUT_ALWAYS_ON

3

Test Point, Miniature, SMT

Testpoint_Keystone_Miniature

5015

Keystone

VIN_MON

1

Test Point, Miniature, Red, TH

Red Miniature Testpoint

5000

Keystone

C1

0

3900 pF

CAP, CERM, 3900 pF, 100 V, +/- 10%, X7R, 0402

0402

GRM155R72A392KA01D

MuRata

C8, C9

0

0.33 uF

CAP, CERM, 0.33 µF, 50 V,+/- 10%, X8R, AEC-Q200 Grade 0, 1206

1206

CGA5L2X8R1H334K160AA

TDK

C11

0

220 uF

CAP, AL, 220 uF, 63 V, +/- 20%, 0.16 ohm, AEC-Q200 Grade 2, SMD

SMT Radial H13

EEV-FK1J221Q

Panasonic

C12, C14

0

0.015 uF

CAP, CERM, 0.015 uF, 100 V, +/- 10%, X7R, AEC-Q200 Grade 1, 0603

0603

CGA3E2X7R2A153K080AA

TDK

D3

0

33 V

Diode, TVS, Uni, 33 V, 53.3 Vc, SMB

SMB

SMBJ33A-13-F

Diodes Inc.

D4

0

16 V

Diode, TVS, Uni, 16 V, 26 Vc, SMB

SMB

SMBJ16A-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

J8

0

Terminal Block, 2x1, 3.81mm, 24-16 AWG, 10A, 300VAC, TH

2x1 Terminal Block

691214310002

Wurth Elektronik

L1

0

10 ohm

Ferrite Bead, 10 ohm @ 100 MHz, 10.5 A, 1206

1206

74279221100

Wurth Elektronik

L2

0

1 uH

Inductor, Shielded, Composite, 1 uH, 43.5 A, 0.001 ohm, SMD

Inductor, 11.3x10x10mm

XAL1010-102MEB

Coilcraft

Q3, Q4

0

INF-MOSFET-N-3

PG-TO252-3

IPD100N06S4-03

Infineon