DC/DC Converter. LM5180 Datasheet

LM5180 Converter. Datasheet pdf. Equivalent

Part LM5180
Description PSR Flyback DC/DC Converter
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LM5180
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LM5180
SNVSB06D – JULY 2018 – REVISED MAY 2020
LM5180 65-VIN PSR Flyback DC/DC Converter with 100-V, 1.5-A Integrated Power MOSFET
1 Features
2 Applications
1 Designed for reliable and rugged applications
– Wide input voltage range of 4.5 V to 65 V with
operation down to 3.5 V after start-up
– Robust solution with only one component
crossing the isolation barrier
– ±1.5% total output regulation accuracy
– Optional VOUT temperature compensation
– 6-ms internal or programmable soft start
– Input UVLO and thermal shutdown protection
– Hiccup-mode overcurrent fault protection
– –40°C to +150°C junction temperature range
• Integration reduces solution size and cost
– Integrated 100-V, 0.4-Ω power MOSFET
– No opto-coupler or transformer auxiliary
winding required for VOUT regulation
– Internal loop compensation
• High-efficiency PSR flyback operation
– Quasi-resonant MOSFET turn-off in BCM
– Low input quiescent current
– External bias option for improved efficiency
– Single- and multi-output implementations
• Ultra-low conducted and radiated EMI signatures
– Soft switching avoids diode reverse recovery
– Optimized for CISPR 32 EMI requirements
• Create a custom regulator design using
WEBENCH® Power Designer
Isolated field transmitters and field actuators
• Multi-output rails for analog input modules
Motor drives: IGBT and SiC gate drive supplies
Building automation HVAC systems
• Isolated bias supplies
3 Description
The LM5180 is a primary-side regulated (PSR)
flyback converter with high efficiency over a wide
input voltage range of 4.5 V to 65 V. The isolated
output voltage is sampled from the primary-side
flyback voltage, eliminating the need for an
optocoupler, voltage reference, or third winding from
the transformer for output voltage regulation.
The high level of integration results in a simple,
reliable and high-density design with only one
component crossing the isolation barrier. Boundary
conduction mode (BCM) switching enables a compact
magnetic solution and better than ±1.5% load and
line regulation performance. An integrated 100-V
power MOSFET provides output power up to 7 W
with enhanced headroom for line transients.
The LM5180 flyback converter is available in a 8-pin,
4-mm × 4-mm, thermally-enhanced WSON package
with 0.8-mm pin pitch.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM5180
WSON (8)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
VIN = 4.5 V...65 V
Typical Application
T1 DFLY VOUT = 5 V
CIN
2.2 F
DZ
VIN
EN/UVLO SW
LM5180
GND
FB
DF 3 : 1
RFB
158 k:
RSET
SS/BIAS
TC
RSET
12.1 k:
COUT
100 F
Typical Efficiency, VOUT = 5 V
90
85
80
75
70
VIN = 12V
VIN = 24V
65 VIN = 36V
VIN = 48V
VIN = 65V
60
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
Output Current (A)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



LM5180
LM5180
SNVSB06D – JULY 2018 – REVISED MAY 2020
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings.............................................................. 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics........................................... 6
7.6 Typical Characteristics .............................................. 7
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 10
8.3 Feature Description................................................. 10
8.4 Device Functional Modes........................................ 16
9 Application and Implementation ........................ 17
9.1 Application Information............................................ 17
9.2 Typical Applications ................................................ 17
10 Power Supply Recommendations ..................... 35
11 Layout................................................................... 36
11.1 Layout Guidelines ................................................. 36
11.2 Layout Examples................................................... 37
12 Device and Documentation Support ................. 38
12.1 Device Support...................................................... 38
12.2 Documentation Support ........................................ 39
12.3 Receiving Notification of Documentation Updates 39
12.4 Support Resources ............................................... 39
12.5 Trademarks ........................................................... 39
12.6 Electrostatic Discharge Caution ............................ 40
12.7 Glossary ................................................................ 40
13 Mechanical, Packaging, and Orderable
Information ........................................................... 40
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision C (April 2019) to Revision D
Page
• Added EMI bullet in Features ................................................................................................................................................. 1
• Added magnetic components in Table 3 ............................................................................................................................. 18
• Added expressions for UVLO turn-on/off voltage thresholds in Typical Applications .......................................................... 21
• Updated Layout Examples .................................................................................................................................................. 37
• Added PSR flyback converter family in Device and Documentation Support ...................................................................... 38
• Updated Documentation Support ......................................................................................................................................... 39
Changes from Revision B (February 2019) to Revision C
Page
• Changed EC table specs for current limit............................................................................................................................... 5
• Added note about failsafe current limit ................................................................................................................................. 15
Changes from Revision A (August 2018) to Revision B
Page
• Changed Vin-max to 65 V ...................................................................................................................................................... 1
• Added CISPR 25 class 5 EMI plots...................................................................................................................................... 23
Changes from Original (July 2018) to Revision A
Page
• Updated Features list; added an Application ......................................................................................................................... 3
• Deleted soft-start capacitor in Figure 23, Figure 38, and Figure 51 .................................................................................... 17
• Updated transformer part number in Table 2 ...................................................................................................................... 18
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