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LM5180-Q1

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SNVSB07A – JULY 2018 – REVISED AUGUST 2018

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Copyright © 2018, Texas Instruments Incorporated

8.2.1.1 Design Requirements

The required input, output, and performance parameters for this application example are shown in Table 1.

Table 1. Design Parameters

DESIGN PARAMETER

VALUE

Input voltage range

10 V to 70 V

Input UVLO thresholds

9.5 V on, 6.5 V off

Output voltage

5 V

1 A

Output voltage regulation

±1%

Output voltage ripple

< 100 mV

The target full-load efficiency is 86% based on a nominal input voltage of 24 V and an isolated output voltage of

components are listed in Table 2.

Table 2. List of Components for Design 1

REF DES

QTY

SPECIFICATION

VENDOR

PART NUMBER

1

4.7 µF, 100 V, X7R, 1206, ceramic

Murata

GRM31CZ72A475KE11

4.7 µF, 100 V, X7S, 1210, ceramic, AEC-Q200

TDK

CGA6M3X7S2A475K200AB

Murata

GCM32DC72A475ME01

Taiyo Yuden

HMK325C7475MMHPE

1

100 µF, 6.3 V, X7S, 1210, ceramic

Murata

GRM32EC70J107ME15

Taiyo Yuden

JMK325AC7107MM-P

100 µF, 6.3 V, X6S, 1210, ceramic

TDK

C3225X6S0J107M250AC

Murata

GRM32EC80J107ME20L

100 µF, 6.3 V, X5R, 1210, ceramic

TDK

C3225X5R0J107M250AC

Murata

GRT32ER60J107ME13

Würth Electronik

885012109004

1

Zener, 24 V, 1 W, PowerDI-123, AEC-Q101

DFLZ24-7

Diodes Inc.

1

Switching diode, 75 V, 0.25 A, SOD-323

CMDD4448

Central Semi

1

Schottky diode, 40 V, 2 A, SOD-123

FSV340FP

ONsemi

1

Zener, 5.6 V, 5%, SOD-523, AEC-Q101

BZX585-C5V6

Nexperia

1

158 kΩ, 1%, 0402

Std

Std

1

12.1 kΩ, 1%, 0402

Std

Std

1

130 kΩ, 1%, 0402

Std

Std

1

536 kΩ, 1%, 0603

Std

Std

1

100 kΩ, 1%, 0402

Std

Std

1

30 µH, 2 A, turns ratio 3 : 1, SMT, 9 × 10 mm

Würth Electronik

750317605

Coilcraft

YA8779-BL

40 µH, 2 A, turns ratio 3 : 1, SMT, 13 × 15 mm

Würth Electronik

750313974

1

LM5180-Q1 PSR flyback converter, AEC-Q100

Texas Instruments

LM5180QNGURQ1

8.2.1.2 Detailed Design Procedure

8.2.1.2.1

Custom Design With WEBENCH® Tools

Click here to create a custom design using the LM5180-Q1 device with WEBENCH® Power Designer.

2. Optimize the design for key parameters such as efficiency, footprint, and cost using the optimizer dial.

3. Compare the generated design with other possible solutions from Texas Instruments.