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LM51561-Q1 Datasheet Preview

LM51561-Q1 Datasheet

Non-synchronous Boost/SEPIC/Flyback Controller

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LM5156-Q1, LM51561-Q1
SNVSBI7B – JANUARY 2L0M20515R6E-VQIS1E,DLJMAN5U1A5R6Y12-Q0211
SNVSBI7B – JANUARY 2020 – REVISED JANUARY 2021
LM5156x-Q1 2.2-MHz Wide VIN 65-V Non-synchronous Boost/SEPIC/Flyback
Controller with Dual Random Spread Spectrum
1 Features
• AEC-Q100 qualified for automotive applications
– Temperature grade 1: –40°C to +125°C TA
Functional Safety-Capable
Documentation available to aid functional safety
system design
• Suited for wide input operating range car battery
applications
– 3.5-V to 60-V Operating range (65-V abs max)
– 2.97-V to 16-V When BIAS = VCC
– Minimum boost supply voltage 1.5 V when
BIAS ≥ 3.5 V
– Input transient protection up to 65 V
– Minimized battery drain
• Low shutdown current (IQ ≤ 2.6 µA)
• Low operating current (IQ ≤ 490 µA)
• Small solution size and low cost
– Maximum switching frequency of 2.2 MHz
– 12-Pin WSON package (3 mm × 2 mm) with
wettable flanks
– Integrated error amplifier allows primary-side
regulation without optocoupler (flyback)
– Minimized undershoot during cranking (start-
stop application)
• EMI mitigation
– Selectable dual random spread spectrum
– Lead-less package
• Higher efficiency with low-power dissipation
– 100-mV ±7% accurate current limit threshold
– Strong 1.5-A peak standard MOSFET driver
– Supports external VCC supply
• Avoid AM band interference and crosstalk
– Optional clock synchronization
– Dynamically programmable switching frequency
from 100 kHz to 2.2 MHz
• Integrated protection features
– Constant peak current limiting over input
voltage
– Optional hiccup mode overload protection (see
the Device Comparison Table)
– Programmable line UVLO
– OVP protection
– Thermal shutdown
• Accurate ±1% accuracy feedback reference
• Programmable extra slope compensation
• Adjustable soft start
• PGOOD indicator
• Create a custom design using the LM5156x-Q1
with the WEBENCH® power designer
2 Applications
Automotive 12-V or 24-V battery application
Automotive start-stop application
High voltage LiDAR power supply
Multiple-output flyback without optocoupler
Automotive rear-lights LED bias supply
Wide input boost, SEPIC, flyback power module
Battery-powered boost, SEPIC, flyback
3 Description
The LM5156x-Q1 (LM5156-Q1 and LM51561-Q1)
device is a wide input range, non-synchronous boost
controller that uses peak current mode control. The
device can be used in boost, SEPIC, and flyback
topologies.
The LM5156x-Q1 device can start up from a 1-cell
battery with a minimum of 2.97 V if the BIAS pin is
connected to the VCC pin. It can operate with the
input supply voltage as low as 1.5 V if the BIAS pin is
greater than 3.5 V.
Device Information
PART NUMBER
PACKAGE(1)
BODY SIZE (NOM)
LM5156x-Q1
WSON (12)
3.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
VSUPPLY
VLOAD
BIAS VCC GATE
UVLO/SYNC CS
DITHOFF
GND
PGOOD
FB
RT SS COMP
Typical Boost Application
CopyrighAtn©I2M0P21OTReTxaAsNInTsNtruOmTeInCtsEInactotrhpeoreatnedd of this data sheet addresses availability, warranty, changes, use iSnusbamfeittyD-corcituicmael anpt pFleiceadtbioancsk,
1
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Product Folder Links: LM5156-Q1 LM51561-Q1




etcTI

LM51561-Q1 Datasheet Preview

LM51561-Q1 Datasheet

Non-synchronous Boost/SEPIC/Flyback Controller

No Preview Available !

LM5156-Q1, LM51561-Q1
SNVSBI7B – JANUARY 2020 – REVISED JANUARY 2021
www.ti.com
Table of Contents
1 Features............................................................................1
2 Applications..................................................................... 1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Description (continued).................................................. 3
6 Device Comparison Table...............................................3
7 Pin Configuration and Functions...................................4
8 Specifications.................................................................. 5
8.1 Absolute Maximum Ratings........................................ 5
8.2 ESD Ratings............................................................... 5
8.3 Recommended Operating Conditions.........................6
8.4 Thermal Information....................................................6
8.5 Electrical Characteristics.............................................6
8.6 Typical Characteristics................................................ 9
9 Detailed Description......................................................12
9.1 Overview................................................................... 12
9.2 Functional Block Diagram......................................... 12
9.3 Feature Description...................................................13
9.4 Device Functional Modes..........................................25
10 Application and Implementation................................ 26
10.1 Application Information........................................... 26
10.2 Typical Application.................................................. 26
10.3 System Examples................................................... 31
11 Power Supply Recommendations..............................35
12 Layout...........................................................................36
12.1 Layout Guidelines................................................... 36
12.2 Layout Examples.................................................... 37
13 Device and Documentation Support..........................39
13.1 Device Support....................................................... 39
13.2 Documentation Support.......................................... 39
13.3 Receiving Notification of Documentation Updates..39
13.4 Support Resources................................................. 39
13.5 Trademarks............................................................. 39
13.6 Electrostatic Discharge Caution..............................40
13.7 Glossary..................................................................40
14 Mechanical, Packaging, and Orderable
Information.................................................................... 41
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (June 2020) to Revision B (January 2021)
Page
• Updated the numbering format for tables, figures and cross-references throughout the document. .................1
2
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Product Folder Links: LM5156-Q1 LM51561-Q1
Copyright © 2021 Texas Instruments Incorporated


Part Number LM51561-Q1
Description Non-synchronous Boost/SEPIC/Flyback Controller
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