Inicio Gestión de la energía Convertidores de CA/CC y CC/CC (FET integrado)
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Gestión de la energía
Convertidores de CA/CC y CC/CC (FET integrado)
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LM65680-Q1

PRESENTACIÓN PRELIMINAR

Convertidor buck síncrono de 65 V y 8 A optimizado para baja EMI para automoción

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LM65680-Q1

PRESENTACIÓN PRELIMINAR
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Detalles del producto

Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Compliant Topology Buck Type Converter Iout (max) (A) 8 Vin (min) (V) 3 Vin (max) (V) 65 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2200 Features Adjustable soft start, Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Low Noise, Over Current Protection, Power good, Stackable, Thermal shutdown, UVLO adjustable EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode Current Vout (min) (V) 0.8 Iq (typ) (µA) 2.1 Duty cycle (max) (%) 99
Rating Automotive Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Compliant Topology Buck Type Converter Iout (max) (A) 8 Vin (min) (V) 3 Vin (max) (V) 65 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 2200 Features Adjustable soft start, Adjustable switching frequency, Auto Mode, Automotive load dump, Enable, Fixed Output, Forced PWM, Frequency synchronization, Low Noise, Over Current Protection, Power good, Stackable, Thermal shutdown, UVLO adjustable EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode Current Vout (min) (V) 0.8 Iq (typ) (µA) 2.1 Duty cycle (max) (%) 99
WQFN-FCRLF (RZY) 26 20.25 mm² 4.5 x 4.5
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Wide input voltage range: 3V to 70V
  • 1% accurate, VOUT from 0.8V to 60V
  • Optimized for low EMI requirements
    • Facilitates CISPR 25 Class 5 compliance
    • Pin-configurable dual-random spread spectrum and slew-rate control reduce peak emissions
    • Enhanced HotRod™ QFN package with symmetrical pinout
    • Switching frequency from 300kHz to 2.2MHz
    • Pin-configurable AUTO or FPWM operation
  • Low minimum on time: 36ns (typical)
    • Enables 36V to 3.3V conversion at 2.1MHz
  • High-efficiency power conversion
    • > 95% peak efficiency, 12VIN to 5VOUT, 400kHz
    • No-load input current: 2.1µA
  • High power density
    • Internal compensation, OCP, and TSD
    • 4.5mm × 4.5mm eQFN-26 with wettable flanks
    • ΘJA = 18°C/W (LM65680-Q1EVM)
  • VIN to PGND pin clearance: 1.1mm
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Wide input voltage range: 3V to 70V
  • 1% accurate, VOUT from 0.8V to 60V
  • Optimized for low EMI requirements
    • Facilitates CISPR 25 Class 5 compliance
    • Pin-configurable dual-random spread spectrum and slew-rate control reduce peak emissions
    • Enhanced HotRod™ QFN package with symmetrical pinout
    • Switching frequency from 300kHz to 2.2MHz
    • Pin-configurable AUTO or FPWM operation
  • Low minimum on time: 36ns (typical)
    • Enables 36V to 3.3V conversion at 2.1MHz
  • High-efficiency power conversion
    • > 95% peak efficiency, 12VIN to 5VOUT, 400kHz
    • No-load input current: 2.1µA
  • High power density
    • Internal compensation, OCP, and TSD
    • 4.5mm × 4.5mm eQFN-26 with wettable flanks
    • ΘJA = 18°C/W (LM65680-Q1EVM)
  • VIN to PGND pin clearance: 1.1mm

The LM656x0-Q1 are a family of stackable, automotive buck converters designed for high efficiency, high power density, and ultra-low electromagnetic interference (EMI). The converters operate over a wide input voltage range of 3V to 70V simplifying input surge protection design.

The low EMI operation is enabled with minimized loop inductance, pin-selectable SW node slew-rate control and dual-random spread spectrum (DRSS). The DRSS significantly reduces peak emissions through a combination of triangular and pseudo-random modulation while keeping output voltage ripple very low.

The current-mode control architecture with 36ns minimum on-time allows high conversion ratios at high frequencies, easy loop compensation, fast transient response, and excellent load and line regulation. Up to two converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for supporting output current up to 16A.

The LM656x0-Q1 are a family of stackable, automotive buck converters designed for high efficiency, high power density, and ultra-low electromagnetic interference (EMI). The converters operate over a wide input voltage range of 3V to 70V simplifying input surge protection design.

The low EMI operation is enabled with minimized loop inductance, pin-selectable SW node slew-rate control and dual-random spread spectrum (DRSS). The DRSS significantly reduces peak emissions through a combination of triangular and pseudo-random modulation while keeping output voltage ripple very low.

The current-mode control architecture with 36ns minimum on-time allows high conversion ratios at high frequencies, easy loop compensation, fast transient response, and excellent load and line regulation. Up to two converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for supporting output current up to 16A.
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Documentación técnica

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* Data sheet LM656x0-Q1 70V, 8A/6A/4A, Automotive Buck Converters Optimized for Low EMI and High Power Density datasheet PDF | HTML 24 oct 2024
EVM User's guide LM65680-Q1 70V, 8A Buck Regulator Evaluation Module User's Guide PDF | HTML 15 oct 2024
Certificate LM65680-Q1EVM EU Declaration of Conformity (DoC) 03 sep 2024

Diseño y desarrollo

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Placa de evaluación

LM65680-Q1EVM — Módulo de evaluación LM65680-Q1

El módulo de evaluación (EVM) LM65680-Q1 es un regulador buck CC/CC síncrono que emplea rectificación síncrona para lograr una alta eficiencia de conversión en un tamaño reducido. El EVM funciona en un amplio rango de tensión de entrada de 6 V a 70 V, lo que ofrece una tensión nominal de gran (...)
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WQFN-FCRLF (RZY) 26 Ultra Librarian
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