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LM51571-Q1

Part Number	LM51571-Q1
Manufacturer	Texas Instruments
Description	Boost/SEPIC/Flyback Converter
Published	Apr 21, 2021
Detailed Description	www.ti.com LM5157-Q1, LM51571-Q1 SNVSBK8A – OCTOBERLM2052105–7R-EQV1IS,ELDMM5A1R5C7H12-Q0211 SNVSBK8A – OCTOBER 2020 – ...
Datasheet	LM51571-Q1 PDF File

Overview

www.
ti.
com LM5157-Q1, LM51571-Q1 SNVSBK8A – OCTOBERLM2052105–7R-EQV1IS,ELDMM5A1R5C7H12-Q0211 SNVSBK8A – OCTOBER 2020 – REVISED MARCH 2021 LM5157x-Q1 2.
2-MHz Wide VIN 50-V Boost/SEPIC/Flyback Converter 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 operating range for car battery applications – 2.
9-V to 45-V input operating range – 48-V maximum output (50-V abs max) – Minimum boost supply voltage of 1.
5 V when BIAS ≥ 2.
9 V – Input transient protection up to 50 V – Minimized battery drain • Low shutdown current (IQ ≤ 2.
6 µA) • Low operating current (IQ ≤ 700 µA) • Small solution size and low cost – Maximum switching frequency up to 2.
2 MHz – 16-pin QFN package (3 mm × 3 mm) with wettable flanks – Integrated error amplifier allows primary-side regulation without optocoupler (flyback) – Minimized undershoot during cranking (startstop application) – Accurate current limit (see the Device Comparison Table) • EMI mitigation – Selectable dual random spread spectrum – Lead-less package • Higher efficiency with low-power dissipation – 45-mΩ RDSON switch – Fast switching, small switching loss • Avoid AM band interference and crosstalk – Optional clock synchronization – Dynamically programmable wide switching frequency from 100 kHz to 2.
2 MHz • Integrated protection features – Constant current limiting over input voltage – Selectable hiccup mode overload protection – Programmable line UVLO – OVP protection – Thermal shutdown • Accurate ±1% accuracy feedback reference • Adjustable soft start • PGOOD indicator • Create a custom design using the LM5157x-Q1 with the WEBENCH® Power Designer 2 Applications • Battery-powered wide input boost, SEPIC, flyback converter • Automotive voltage stabilizer in SEPIC • Automotive start-stop application • Automotive emergency call application/b...

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LM51571-Q1 Boost/SEPIC/Flyback Converter - Texas Instruments

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