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AC/DC & DC/DC converters (integrated FET)

LM5161-Q1

現行

寬輸入 4.5-V 至 100-V、1-A 同步降壓 / Fly-Buck 轉換器

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產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的產品不同
LM5164-Q1 現行 具有超低 IQ 的 6V 至 100V 輸入、1A 同步 DC-DC 轉換器 Ultra-low EMI emission.

LM5161-Q1

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 1 Vin (min) (V) 4.5 Vin (max) (V) 100 Topology Buck, Flybuck Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Features Enable, Light load efficiency, Pre-bias soft start, Synchronous rectification Control mode COT with emulated ripple, Constant on-time (COT) Vout (min) (V) 2 Vout (max) (V) 92 Rating Automotive Operating temperature range (°C) -40 to 125
Iout (max) (A) 1 Vin (min) (V) 4.5 Vin (max) (V) 100 Topology Buck, Flybuck Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Features Enable, Light load efficiency, Pre-bias soft start, Synchronous rectification Control mode COT with emulated ripple, Constant on-time (COT) Vout (min) (V) 2 Vout (max) (V) 92 Rating Automotive Operating temperature range (°C) -40 to 125
HTSSOP (PWP) 14 32 mm² 5 x 6.4
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • Wide 4.5-V to 100-V Input Voltage Range
  • Integrated High-Side and Low-Side Switches
    • No Schottky Diode Required
  • 1-A Maximum Load Current
  • Constant ON-Time Control
    • No External Loop Compensation
    • Fast Transient Response
  • Selectable DCM Buck Operation at Light Load
  • CCM Option Supports Multi-Output Fly-Buck™
  • No External Ripple circuit needed (at FPWM = 0)
  • Nearly Constant Switching Frequency
  • Frequency Adjustable Up to 1 MHz
  • Programmable Soft-Start Time
  • Prebias Start-Up
  • Peak Current Limiting Protection
  • Adjustable Input UVLO and Hysteresis
  • ±1% Feedback Voltage Reference
  • Thermal Shutdown Protection
  • Create a Custom Design Using the LM5161-Q1 With the WEBENCH® Power Designer
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • Wide 4.5-V to 100-V Input Voltage Range
  • Integrated High-Side and Low-Side Switches
    • No Schottky Diode Required
  • 1-A Maximum Load Current
  • Constant ON-Time Control
    • No External Loop Compensation
    • Fast Transient Response
  • Selectable DCM Buck Operation at Light Load
  • CCM Option Supports Multi-Output Fly-Buck™
  • No External Ripple circuit needed (at FPWM = 0)
  • Nearly Constant Switching Frequency
  • Frequency Adjustable Up to 1 MHz
  • Programmable Soft-Start Time
  • Prebias Start-Up
  • Peak Current Limiting Protection
  • Adjustable Input UVLO and Hysteresis
  • ±1% Feedback Voltage Reference
  • Thermal Shutdown Protection
  • Create a Custom Design Using the LM5161-Q1 With the WEBENCH® Power Designer

The LM5161-Q1 is a 100-V, 1-A synchronous step-down converter with integrated high-side and low-side MOSFETs. The constant-ON-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire operating temperature range. The ON-time varies inversely with input voltage resulting in nearly constant switching frequency. Peak and valley current limit circuits protect against overload conditions. The under-voltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis. The FPWM input pin in LM5161-Q1 selects either the forced continuous conduction mode (CCM) under all load levels or the discontinuous conduction mode (DCM) under light or no load conditions. When operating in forced CCM, the LM5161-Q1 supports the multiple output and isolated Fly-Buck applications. When programmed for the DCM operation, the LM5161-Q1 provides a tightly regulated buck output without any additional external feedback ripple injection circuit.

The LM5161-Q1 is a 100-V, 1-A synchronous step-down converter with integrated high-side and low-side MOSFETs. The constant-ON-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire operating temperature range. The ON-time varies inversely with input voltage resulting in nearly constant switching frequency. Peak and valley current limit circuits protect against overload conditions. The under-voltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis. The FPWM input pin in LM5161-Q1 selects either the forced continuous conduction mode (CCM) under all load levels or the discontinuous conduction mode (DCM) under light or no load conditions. When operating in forced CCM, the LM5161-Q1 supports the multiple output and isolated Fly-Buck applications. When programmed for the DCM operation, the LM5161-Q1 provides a tightly regulated buck output without any additional external feedback ripple injection circuit.
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類型 標題 日期
* Data sheet LM5161-Q1 Wide Input 100-V, 1-A Synchronous Buck/Fly-Buck™ Converter datasheet (Rev. A) PDF | HTML 2017年 11月 30日
White paper Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) 2019年 4月 10日
Application note Stability Analysis and Design of COT Type-3 Ripple Circuit 2019年 3月 20日
Application brief Powering Drones With a Wide VIN DC-DC Converter (Rev. A) 2019年 2月 5日
Application note EMI and Thermal Design Tips and Tricks for 48-V IGBT/SiC/GaN Automotive Supply 2018年 7月 27日
Technical article Why a wide VIN DC/DC converter is a good fit for high-cell-count battery-powered d PDF | HTML 2017年 11月 21日
Technical article Simplifying 100V wide VIN power conversion PDF | HTML 2016年 11月 11日
EVM User's guide LM5161 Fly-Buck (Isolated Buck) EVM User’s Guide (Rev. A) 2016年 8月 19日
EVM User's guide LM5161PWPBKEVM Buck Evaluation Module User's Guide (Rev. A) 2016年 8月 19日
Technical article Create a Fly-Buck™ converter in WEBENCH® Power Designer PDF | HTML 2015年 10月 9日
White paper Designing isolated rails on the fly with Fly-Buck™ converters 2015年 9月 29日
Technical article How to design for EMC and isolation with Fly-Buck™ converters PDF | HTML 2015年 7月 28日
Application note Is Your IGBT Gate-Driver Power Supply Optimized 2015年 3月 12日
Analog Design Journal Fly-Buck(TM) converter provides EMC and isolation in PLC applications 2015年 1月 29日
Application note AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) 2014年 12月 17日
White paper Wide VIN power management ICs simplify white paper (Rev. A) 2013年 9月 19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

LM5161PWPBKEVM — LM5161 寬輸入電壓同步降壓轉換器恒定導通時間評估模組

The LM5161PWPBKEVM evaluation board provides a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 12-V output over an input range of 15V to 80 V. The circuit delivers load currents to 1.0 A. The application schematic is setup (...)
使用指南: PDF
TI.com 無法提供
開發板

LM5161PWPFBKEVM — LM5161 寬輸入電壓 Fly-Buck 評估模組

The LM5161PWPFBKEVM evaluation board provides a fully functional Fly-buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 12-V secondary isolated output voltage over an input range of 36V to 72 V. The circuit delivers secondary output load (...)
使用指南: PDF
TI.com 無法提供
模擬型號

LM5161 PSpice Buck and Fly-Buck Transient Model

SNVMAV3.ZIP (499 KB) - PSpice Model
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模擬型號

LM5161 Unencrypted PSpice Buck and Fly-Buck Transient Model

SNVMAV4.ZIP (3 KB) - PSpice Model
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參考設計

PMP30603 — -60 V 反相降壓-升壓參考設計

This tiny reference design delivers -60-V output voltage from an input voltage around 5 V typically generated by an automotive pre regulator. The controller in that circuit is LM5161-Q1 providing two internal MOSFETs. Overall, this converter is used as auxiliary supply for LIDAR applications. 
Test report: PDF
電路圖: PDF
參考設計

PMP15007 — 具有超小型耦合電感器的雙輸出 LM5161-Q1 Fly-Buck™ 參考設計

PMP15007 uses the LM5161-Q1 in a Fly-Buck topology with the primary and secondary output both set to 5V nominal. The circuit accommodates a voltage input range from 36V to 72V, ideal for the 48V nominal input rail. While the primary side is set at 5.32V nominally, the secondary isolated side sees (...)
Test report: PDF
電路圖: PDF
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