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AC/DC 和 DC/DC 控制器 (外部 FET)

LM5146-Q1

現行

具有寬占空比範圍的車用 100V 同步降壓 DC/DC 控制器

立即訂購
產品規格表

LM5146-Q1

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 5.5 Vin (max) (V) 100 Iout (max) (A) 30 Operating temperature range (°C) -40 to 150 Control mode Voltage mode Topology Buck Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 60 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, UVLO adjustable Iq (typ) (µA) 1750 Duty cycle (max) (%) 99 Number of phases 1 TI functional safety category Functional Safety-Capable
Vin (min) (V) 5.5 Vin (max) (V) 100 Iout (max) (A) 30 Operating temperature range (°C) -40 to 150 Control mode Voltage mode Topology Buck Rating Automotive Vout (min) (V) 0.8 Vout (max) (V) 60 Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, UVLO adjustable Iq (typ) (µA) 1750 Duty cycle (max) (%) 99 Number of phases 1 TI functional safety category Functional Safety-Capable
VQFN (RGY) 20 15.75 mm² 4.5 x 3.5
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 100 V
    • 150°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Lossless RDS(on) or shunt current sensing
    • Optimized for CISPR 25 Class 5 requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC In and SYNC Out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5146-Q1 with WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient temperature range
  • Functional Safety-Capable
  • Versatile synchronous buck DC/DC controller
    • Wide input voltage range of 5.5 V to 100 V
    • 150°C maximum junction temperature
    • 0.8-V reference with ±1% feedback accuracy
    • Adjustable output voltage from 0.8 V to 60 V
    • 40-ns tON(min) for high VIN / VOUT ratio
    • 140-ns tOFF(min) for low dropout
    • Lossless RDS(on) or shunt current sensing
    • Optimized for CISPR 25 Class 5 requirements
  • Switching frequency from 100 kHz to 1 MHz
    • SYNC In and SYNC Out capability
    • Selectable diode emulation or FPWM
  • 7.5-V gate drivers for standard VTH MOSFETs
    • 14-ns adaptive dead-time control
    • 2.3-A source and 3.5-A sink capability
  • Inherent protection features for robust design
    • Adjustable output voltage soft start
    • Hiccup-mode overcurrent protection
    • Input UVLO with hysteresis
    • VCC and gate-drive UVLO protection
    • Precision enable input and open-drain PGOOD indicator for sequencing and control
    • Thermal shutdown protection with hysteresis
  • 20-pin VQFN package with wettable flanks
  • Create a custom design using the LM5146-Q1 with WEBENCH Power Designer

The LM5146-Q1 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146-Q1 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance 48-V battery automotive applications, ADAS (surround view ECU) and HEV/EV systems.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications

The LM5146-Q1 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146-Q1 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance 48-V battery automotive applications, ADAS (surround view ECU) and HEV/EV systems.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications
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類型 標題 日期
* Data sheet LM5146-Q1 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range datasheet (Rev. B) PDF | HTML 2021年 6月 2日
E-book An Engineer’s Guide to Low EMI in DC/DC Regulators 2021年 4月 21日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
Functional safety information LM5146-Q1 Functional Safety, FIT Rate, and Failure Mode Distribution (Rev. A) 2020年 6月 12日
Technical article How to meet European Commission ADAS requirements with TI DC/DC converters PDF | HTML 2019年 5月 9日
Application brief IC Package Features Lead to Higher Reliability in Automotive Systems 2019年 2月 20日
Application brief Improving RF Power Amplifier Efficiency in 5G Radio Systems 2018年 9月 5日
EVM User's guide LM5146-Q1EVM User's Guide 2018年 8月 10日
White paper An overview of radiated EMI specifications for power supplies 2018年 6月 5日
White paper An overview of conducted EMI specifications for power supplies 2018年 2月 1日
Application brief Improve DC/DC Regulator EMI for Free with Optimized Power Stage Layout 2017年 11月 13日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM5146-Q1-EVM12V — 同步降壓控制器評估模組

The LM5146-Q1-EVM12V high density evaluation module (EVM) is designed to showcase the performance of the LM5146-Q1 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a (...)

使用指南: PDF
TI.com 無法提供
模擬型號

LM5146-Q1 PSpice Unencrypted Transient Model (Rev. A)

SNVMBL1A.ZIP (129 KB) - PSpice Model
下載
計算工具

LM5146DESIGN-CALC — LM5146-Q1 同步降壓控制器快速入門設計工具

Welcome to the LM5146-Q1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the LM5146-Q1 95-V synchronous buck controller. As such, the user can expeditiously arrive at an optimized design to meet the (...)
使用指南: PDF
下載
Gerber 檔案

LM5146-Q1 Synchronous Buck Controller Design Tool (Rev. A)

SNVC220A.ZIP (2577 KB)
下載
PCB 佈局

LM5146-Q1-EVM12V PCB Layout Files

SNVR473.ZIP (7838 KB)
下載
PCB 佈局

LM5145EVM-HD-20A PCB Layout Files

SNVR500.ZIP (1493 KB)
下載
參考設計

PMP30916 — -8V 反相降壓升壓參考設計

此反相降壓升壓參考設計使用 LM5146-Q1 從電信輸入 +9 V 至 +56 V 產生 -8 V。透過拓撲結構，控制器為負參考，因此已新增電壓位準移位器以提供 ENABLE 賦能。400 kHz 切換頻率為切換損耗與合理電路板尺寸之間的取捨。
Test report: PDF
參考設計

PMP30600-TH — 具有適用於卡車之擴展輸入電壓範圍的 20-A 車用前置穩壓器參考設計

This reference design is a 100-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 100 kHz to ensure low noise operation. This IC (LM5146-Q1)  is designed for automotive with the ability to handle load dump for truck applications. A (...)
Test report: PDF
電路圖: PDF
參考設計

PMP30600-TL — 具有適用於卡車之擴展輸入電壓範圍的 10-A 車用前置穩壓器參考設計

This reference design is a 50-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 250 kHz to ensure low noise operation. This IC (LM5146-Q1) is designed for automotive with the ability to handle load dump for truck applications.  A (...)
Test report: PDF
電路圖: PDF
參考設計

PMP30600-AL — 10-A 車用前置穩壓器參考設計

This reference design is a 50-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 400 kHz to ensure low noise operation. A resistor-capacitor (RC) snubber attenuates noise in the RF band to reduce radiated emissions. To reduce system EMI, (...)
Test report: PDF
電路圖: PDF
參考設計

PMP30600-AH — 20-A 車用前置穩壓器參考設計

This reference design is a 100-W synchronous buck converter to supply automotive loads. The IC is LM5146-Q1 in fixed frequency operation at 250 kHz to ensure low noise operation. A resistor-capacitor (RC) snubber attenuates noise in the RF band to reduce radiated emissions. To reduce system EMI, (...)
Test report: PDF
電路圖: PDF
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VQFN (RGY) 20 Ultra Librarian
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