DC/DC Converter. LM5180-Q1 Datasheet

LM5180-Q1 Converter. Datasheet pdf. Equivalent

LM5180-Q1 Datasheet
Recommendation LM5180-Q1 Datasheet
Part LM5180-Q1
Description PSR Flyback DC/DC Converter
Feature LM5180-Q1; Product Folder Order Now Technical Documents Tools & Software Support & Community LM5180-Q1 SNV.
Manufacture etcTI
Datasheet
Download LM5180-Q1 Datasheet




Texas Instruments LM5180-Q1
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
LM5180-Q1
SNVSB07C – JULY 2018 – REVISED APRIL 2019
LM5180-Q1 65-VIN PSR Flyback DC/DC Converter with 100-V, 1.5-A Integrated MOSFET
1 Features
1 AEC-Q100-qualified for automotive applications
– Device temperature grade 1: –40°C to 125°C
ambient temperature range
• Designed for reliable and rugged applications
– Wide input voltage range of 4.5 V to 65 V
– 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
– Low EMI operation to meet CISPR 25
• High efficiency PSR flyback operation
– Quasi-resonant switching in boundary
conduction mode (BCM) at heavy load
– External bias option for improved efficiency
– Single- and multi-output implementations
• Create a custom regulator design using
WEBENCH® Power Designer
3 Description
The LM5180-Q1 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-Q1 converter simplifies implementation
of isolated DC/DC supplies with optional features to
optimize performance for the target end equipment.
The output voltage is set by one resistor, while an
optional resistor improves output voltage accuracy by
negating the thermal coefficient of the flyback diode
voltage drop. Additional features include an internally-
fixed or externally-programmable soft start, optional
bias supply connection for higher efficiency, precision
enable input with hysteresis for adjustable line UVLO,
hiccup-mode overload protection, and thermal
shutdown protection with automatic recovery.
The LM5180-Q1 is qualified to automotive AEC-Q100
grade 1 and is available in 8-pin WSON package with
0.8-mm pin pitch and wettable flanks.
2 Applications
• Automotive body electronics
• Automotive power train systems
• Isolated bias power rails
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM5180-Q1
WSON (8)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
VIN = 4.5 V...65 V
T1 DFLY
VOUT = 5 V
CIN
2.2 F
DZ
VIN DF 3 : 1
EN/UVLO SW
LM5180-Q1
GND
FB
RFB
158 k:
RSET
SS/BIAS
TC
RSET
12.1 k:
COUT
100 F
Copyright © 2018, Texas Instruments Incorporated
1
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)
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.



Texas Instruments LM5180-Q1
LM5180-Q1
SNVSB07C – JULY 2018 – REVISED APRIL 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 9
7.1 Overview ................................................................... 9
7.2 Functional Block Diagram ......................................... 9
7.3 Feature Description................................................... 9
7.4 Device Functional Modes........................................ 15
8 Application and Implementation ........................ 16
8.1 Application Information............................................ 16
8.2 Typical Applications ................................................ 16
9 Power Supply Recommendations...................... 32
10 Layout................................................................... 33
10.1 Layout Guidelines ................................................. 33
10.2 Layout Examples................................................... 34
11 Device and Documentation Support ................. 35
11.1 Device Support...................................................... 35
11.2 Documentation Support ....................................... 35
11.3 Receiving Notification of Documentation Updates 36
11.4 Community Resources.......................................... 36
11.5 Trademarks ........................................................... 36
11.6 Electrostatic Discharge Caution ............................ 36
11.7 Glossary ................................................................ 36
12 Mechanical, Packaging, and Orderable
Information ........................................................... 36
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (February 2019) to Revision C
Page
• First release of production-data data sheet ........................................................................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: LM5180-Q1
Copyright © 2018–2019, Texas Instruments Incorporated



Texas Instruments LM5180-Q1
www.ti.com
5 Pin Configuration and Functions
NGU Package
8-Pin WSON With Wettable Flanks
Top View
LM5180-Q1
SNVSB07C – JULY 2018 – REVISED APRIL 2019
SW 1
FB 2
VIN 3
EN/UVLO 4
8 GND
7 RSET
6 TC
5 SS/BIAS
Pin Functions
PIN
NO. NAME
I/O (1)
DESCRIPTION
1
SW
P
Switch node that is internally connected to the drain of the N-channel power MOSFET. Connect
to the primary-side switching terminal of the flyback transformer.
2
FB
I
Primary side feedback pin. Connect a resistor from FB to SW. The ratio of the FB resistor to the
resistor at the RSET pin sets the output voltage.
3
VIN
P/I
Input supply connection. Source for internal bias regulators and input voltage sensing pin.
Connect directly to the input supply of the converter with short, low impedance paths.
Enable input and undervoltage lockout (UVLO) programming pin. If the EN/UVLO voltage is
below 1.1 V, the converter is in shutdown mode with all functions disabled. If the EN/UVLO
4
EN/UVLO
I voltage is greater than 1.1 V and below 1.5 V, the converter is in standby mode with the internal
regulator operational and no switching. If the EN/UVLO voltage is above 1.5 V, the start-up
sequence begins.
Soft-start or bias input. Connect a capacitor from SS/BIAS to GND to adjust the output start-up
5
SS/BIAS
I
time and input inrush current. If SS/BIAS is left open, the internal 6-ms soft-start timer is
activated. Connect an external supply to SS/BIAS to supply bias to the internal voltage regulator
and enable internal soft start.
Temperature compensation pin. Tie a resistor from TC to RSET to compensate for the
6 TC I temperature coefficient of the forward voltage drop of the secondary diode, thus improving
regulation at the secondary-side output.
7
RSET
I
Reference resistor tied to GND to set the reference current for FB. Connect a 12.1-kresistor
from RSET to GND.
8
GND
G Analog and power ground. Ground connection of internal control circuits and power MOSFET.
(1) P = Power, G = Ground, I = Input, O = Output.
Copyright © 2018–2019, Texas Instruments Incorporated
Product Folder Links: LM5180-Q1
Submit Documentation Feedback
3







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)