Inicio Gestión de la energía AC/DC & DC/DC controllers (external FET)
Inicio
Gestión de la energía
AC/DC & DC/DC controllers (external FET)

LM51231-Q1

ACTIVO

Controlador elevador síncrono con VIN amplia de 2.2 MHz y seguimiento de tensión de salida

Haga su pedido ahora
Hoja de datos

LM51231-Q1

ACTIVO
Hoja de datos Haga su pedido ahora

Detalles del producto

Vin (min) (V) 0.8 Vin (max) (V) 42 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Boost Rating Automotive Vout (min) (V) 5 Vout (max) (V) 57 Iq (typ) (A) 0.000011 Duty cycle (max) (%) 93
Vin (min) (V) 0.8 Vin (max) (V) 42 Operating temperature range (°C) -40 to 125 Control mode current mode Topology Boost Rating Automotive Vout (min) (V) 5 Vout (max) (V) 57 Iq (typ) (A) 0.000011 Duty cycle (max) (%) 93
VQFN (RGR) 20 12.25 mm² 3.5 x 3.5
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Suited for wide operating range automotive battery powered applications
    • 3.8-V to 42-V input operating range
    • Dynamically programmable VOUT from 5 V to 20 V, or from 15 V to 57 V
    • Minimum boost input 0.8 V when BIAS ≥ 3.8 V
    • Bypass operation when VSUPPLY > VLOAD
  • BIAS shutdown current ≤ 3 µA
  • Small solution size
    • Maximum switching frequency 2.2 MHz
    • Internal boot diode
    • QFN-20 with wettable flanks
  • EMI mitigation and avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Switching frequency from 100 kHz to 2.2 MHz
    • Selectable switching mode (FPWM, diode emulation)
    • Optional programmable spread spectrum
    • Lead-less package
  • Programmability and flexibility
    • Dynamic VOUT tracking
    • Dynamic switching frequency programming
    • Supports DCR inductor current sensing
    • Programmable input voltage UVLO
    • Adjustable soft start
    • Adaptive dead-time
    • PGOOD indicator
  • Integrated protection features
    • Constant cycle-by-cycle peak current limit over VSUPPLY
    • Overvoltage protection
    • HB-SW short protection
    • Thermal shutdown
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • Suited for wide operating range automotive battery powered applications
    • 3.8-V to 42-V input operating range
    • Dynamically programmable VOUT from 5 V to 20 V, or from 15 V to 57 V
    • Minimum boost input 0.8 V when BIAS ≥ 3.8 V
    • Bypass operation when VSUPPLY > VLOAD
  • BIAS shutdown current ≤ 3 µA
  • Small solution size
    • Maximum switching frequency 2.2 MHz
    • Internal boot diode
    • QFN-20 with wettable flanks
  • EMI mitigation and avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Switching frequency from 100 kHz to 2.2 MHz
    • Selectable switching mode (FPWM, diode emulation)
    • Optional programmable spread spectrum
    • Lead-less package
  • Programmability and flexibility
    • Dynamic VOUT tracking
    • Dynamic switching frequency programming
    • Supports DCR inductor current sensing
    • Programmable input voltage UVLO
    • Adjustable soft start
    • Adaptive dead-time
    • PGOOD indicator
  • Integrated protection features
    • Constant cycle-by-cycle peak current limit over VSUPPLY
    • Overvoltage protection
    • HB-SW short protection
    • Thermal shutdown

The LM51231-Q1 device is a wide input range synchronous boost controller that employs peak current mode control. The device’s wide input range supports automotive cold-crank and load dump. The minimum input voltage can be as low as 0.8 V when BIAS is equal to or greater than 3.8 V. The output voltage can be dynamically programmed by using the tracking function. Bypass mode operation is automatically entered when VSUPPLY > VLOAD, eliminating the body diode drop of the high-side MOSFET. The switching frequency is dynamically programmed with an external resistor from 100 kHz to 2.2 MHz. Switching at 2.2 MHz minimizes AM band interference and allows a small solution size and fast transient response.

The device has built-in protection features such as peak current limit, which is constant over VSUPPLY, overvoltage protection, and thermal shutdown. External clock synchronization, programmable spread spectrum modulation, and a lead-less package with minimal parasitic, help to reduce EMI and avoid cross talk. Additional features include line UVLO, FPWM, diode emulation, DCR inductor current sensing, programmable soft start, and a power-good indicator

The LM51231-Q1 device is a wide input range synchronous boost controller that employs peak current mode control. The device’s wide input range supports automotive cold-crank and load dump. The minimum input voltage can be as low as 0.8 V when BIAS is equal to or greater than 3.8 V. The output voltage can be dynamically programmed by using the tracking function. Bypass mode operation is automatically entered when VSUPPLY > VLOAD, eliminating the body diode drop of the high-side MOSFET. The switching frequency is dynamically programmed with an external resistor from 100 kHz to 2.2 MHz. Switching at 2.2 MHz minimizes AM band interference and allows a small solution size and fast transient response.

The device has built-in protection features such as peak current limit, which is constant over VSUPPLY, overvoltage protection, and thermal shutdown. External clock synchronization, programmable spread spectrum modulation, and a lead-less package with minimal parasitic, help to reduce EMI and avoid cross talk. Additional features include line UVLO, FPWM, diode emulation, DCR inductor current sensing, programmable soft start, and a power-good indicator
open-in-new Buscar otro/a AC/DC & DC/DC controllers (external FET)
Descargar Ver vídeo con transcripción Video

Documentación técnica

star =Principal documentación para este producto seleccionada por TI
No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 2
Tipo Título Fecha
* Data sheet LM51231-Q1 2.2-MHz Wide VIN Synchronous Boost Controller with VOUT Tracking datasheet PDF | HTML 24 nov 2021
Functional safety information LM51231-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 13 sep 2022

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LM5123EVM-BST — Módulo de evaluación LM5123 del controlador elevador

El módulo de evaluación LM5123EVM‑BST muestra las características y el rendimiento del controlador elevador síncrono de tensión de entrada amplia LM5123-Q1, que incluye: La configuración estándar está diseñada para proporcionar una salida regulada de 24 V a 100 W, a partir de una tensión de entrada (...)

Guía del usuario: PDF | HTML
No disponible en TI.com
Modelo de simulación

LM51231-Q1 PSpice Average Model

SLVMDY8.ZIP (74 KB) - PSpice Model
Descargar
Modelo de simulación

LM51231-Q1 PSpice Transient Model

SLVMDY7.ZIP (139 KB) - PSpice Model
Descargar
Símbolo CAD/CAE

LM5123EVM-BST Altium CAD Files

SNVR528.ZIP (1352 KB)
Descargar
Herramienta de cálculo

LM5123-Q1-DESIGNCALC — Calculadora de inicio rápido LM5123-Q1

Welcome to the quickstart design tool for LM5123-Q1. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC boost converter based on the above controller. This tool will help the user expeditiously arrive at an optimized design to meet the application (...)
Ver opciones
Diseños de referencia

TIDA-020033 — Diseño de referencia de fuente de alimentación de seguimiento y audio de clase H para automoción

This reference design demonstrates a Class-H audio and tracking power supply audio subsystem. The TAS6584-Q1 audio amplifier tracks the envelope of the digital audio input and adjusts the LM5123-Q1 boost output voltage to meet the power efficiency requirements without the need for an external (...)
Design guide: PDF
Paquete Pasadores Descargar
VQFN (RGR) 20 Ver opciones
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

Ver todos los temas del foro en inglés

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

Si tiene preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI. ​​​​​​​​​​​​​​

Videos