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LM5156

現行

具備雙隨機展頻的 2.2-MHz 大範圍 VIN 非同步升壓、返馳和 SEPIC 控制器

產品詳細資料

Rating Catalog Topology Boost, Flyback, SEPIC Vin (max) (V) 60 Vin (min) (V) 1.5 Vout (max) (V) 300 Vout (min) (V) 1.5 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light-load efficiency, Nonsynchronous rectification, Power good, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 93 Iq (typ) (A) 0.00049 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
Rating Catalog Topology Boost, Flyback, SEPIC Vin (max) (V) 60 Vin (min) (V) 1.5 Vout (max) (V) 300 Vout (min) (V) 1.5 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light-load efficiency, Nonsynchronous rectification, Power good, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 93 Iq (typ) (A) 0.00049 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
WSON (DSS) 12 6 mm² (3 mm × 2 mm)
  • Functional Safety-Capable
  • Suited for wide input operating range battery applications
    • 3.5-V to 60-V operating range (65-V abs max)
    • 2.97-V to 16-V when BIAS = VCC
    • Minimum boost supply voltage 1.5 V when BIAS ≥ 3.5 V
    • Input transient protection up to 65 V
    • Minimized battery drain
      • Low shutdown current (IQ ≤ 2.6 µA)
      • Low operating current (IQ ≤ 490 µA)
  • Small solution size and low cost
    • Maximum switching frequency of 2.2 MHz
    • 12-Pin WSON package (3 mm × 2 mm)
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
  • EMI mitigation
    • Selectable dual random spread spectrum
    • Lead-less package
  • Higher efficiency with low-power dissipation
    • 100-mV ±7% accurate current limit threshold
    • Strong 1.5-A peak standard MOSFET driver
    • Supports external VCC supply
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Dynamically programmable switching frequency from 100 kHz to 2.2 MHz
  • Integrated protection features
    • Constant peak current limiting over input voltage
    • Optional hiccup mode overload protection (see the Device Comparison Table)
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • ±1% accuracy feedback reference
  • Supports additional slope compensation
  • Programmable soft start
  • PGOOD indicator
  • Create a custom design using the LM5156x with the WEBENCH power designer
  • Functional Safety-Capable
  • Suited for wide input operating range battery applications
    • 3.5-V to 60-V operating range (65-V abs max)
    • 2.97-V to 16-V when BIAS = VCC
    • Minimum boost supply voltage 1.5 V when BIAS ≥ 3.5 V
    • Input transient protection up to 65 V
    • Minimized battery drain
      • Low shutdown current (IQ ≤ 2.6 µA)
      • Low operating current (IQ ≤ 490 µA)
  • Small solution size and low cost
    • Maximum switching frequency of 2.2 MHz
    • 12-Pin WSON package (3 mm × 2 mm)
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
  • EMI mitigation
    • Selectable dual random spread spectrum
    • Lead-less package
  • Higher efficiency with low-power dissipation
    • 100-mV ±7% accurate current limit threshold
    • Strong 1.5-A peak standard MOSFET driver
    • Supports external VCC supply
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Dynamically programmable switching frequency from 100 kHz to 2.2 MHz
  • Integrated protection features
    • Constant peak current limiting over input voltage
    • Optional hiccup mode overload protection (see the Device Comparison Table)
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • ±1% accuracy feedback reference
  • Supports additional slope compensation
  • Programmable soft start
  • PGOOD indicator
  • Create a custom design using the LM5156x with the WEBENCH power designer

The LM5156x (LM5156 and LM51561) device is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies.

The LM5156x device can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.

The LM5156x (LM5156 and LM51561) device is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies.

The LM5156x device can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.

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LM5156H 現行 具備雙隨機展頻的 2.2-MHz 大範圍 VIN 非同步升壓、返馳和 SEPIC 控制器 Functionally equivalent device in a HTSSOP package

技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM5156x 2.2-MHz Wide VIN 65-V Non-synchronous Boost/SEPIC/Flyback Controller with Dual Random Spread Spectrum datasheet PDF | HTML 2021/1/28
Application brief Avoiding Pulse Skip Operation at Light Load Conditions for Asynchronous Boost Converter Designs PDF | HTML 2025/9/16
技術文章 設計 CCM 返馳式轉換器 PDF | HTML Download English Version PDF | HTML 2024/3/20
技術文章 隔離 SEPIC PDF | HTML Download English Version PDF | HTML 2024/3/20
技術文章 讓升壓轉換器發揮更大效用 PDF | HTML Download English Version PDF | HTML 2024/3/20
技術文章 設計 DCM 返馳式轉換器 PDF | HTML Download English Version PDF | HTML 2024/3/20
技術文章 補償二極體壓降變化 PDF | HTML Download English Version PDF | HTML 2024/3/20
技術文章 返馳式轉換器設計考量 PDF | HTML Download English Version PDF | HTML 2024/3/13
應用說明 How to Implement the Soft Start in a Flyback PDF | HTML 2023/7/10
應用說明 How to Design a Boost Converter Using the LM5156 (Rev. A) PDF | HTML 2022/11/14
應用說明 EMI Reduction Technique, Dual Random Spread Spectrum (Rev. A) 2022/10/19
功能安全資訊 LM34966-Q1, LM5156x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution (Rev. C) PDF | HTML 2021/4/28
電子書 An Engineer’s Guide to Low EMI in DC/DC Regulators 2021/4/21
類比設計期刊 The pros and cons of spread‐spectrum implementation methods in buck regulators 2021/3/18
技術文章 Lowering audible noise in automotive applications with TI’s DRSS technology PDF | HTML 2021/3/18

設計與開發

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開發板

LM5156EVM-BST — LM5156 升壓控制器評估模組

LM5156EVM-BST 評估模組展示 LM5156-Q1 廣泛輸入電壓非同步升壓控制器的功能和性能。標準配置的設計可在 3 V 至 12 V 輸入,在 440 kHz 下切換時,在 3 A 時提供 12 V 的穩壓輸出。

此 EVM 旨在簡化配置,讓使用者能夠在同一模組上評估多種不同應用。功能包括外部時脈同步、啟用展頻振盪器抖動、可編程傾斜補償、可調整緩啟動、可編程逐週期電流限制、以及輸出過電壓保護。

使用指南: PDF
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模擬型號

Unencrypted LM5156-Q1 PSpice Transient Model Package (Rev. H)

SNVMBV9H.ZIP (205 KB) - PSpice 模型
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模擬型號

Unencrypted LM5156x-Q1 PSpice Average Model (Rev. A)

SNVMC69A.ZIP (43 KB) - PSpice 模型
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計算工具

SNVC224 — LM5155/56 Boost Controller Quick Start Calculator

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計算工具

SNVC240 — LM5155/56 Flyback Controller Quick Start Calculator

LM5155/56 Flyback Controller Quick Start Calculator
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計算工具

SNVR481 — LM5155/56 SEPIC Controller Quick Start Calculator

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參考設計

PMP30805 — 小型汽車 SEPIC 參考設計

這款微型汽車 SEPIC 參考設計包含 6-W 輔助電源供應器,專為 12-V 偏壓軌而設計。廣泛輸入可接受最低 4.5 Vmin 的啟動,最高 40 Vmax 的突波。由於切換頻率為 2 MHz,雙電感器相當小,可產生優異的動態行為。控制器 LM5155x-Q1 符合成本效益,其內務處理電流可降至最低。選用輸入濾波器可衰減反射漣波,SEPIC 拓撲結構則可透過連續輸入電流支援精細 EMI 行為。
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參考設計

PMP31279 — 12-W 異步車用 SEPIC 參考設計

本參考設計展示以 LM51561 為基礎的 1-A、1.5-A 峰值輸出電流非同步 SEPIC 轉換器,其包含 6 V 至 36 V 的輸入電壓範圍及 12 V 的輸出電壓。12-V 輸入電壓的效率達 90.5%。此設計可在低至 4.5 V 的情況下運作,可支援汽車啟動。2-MHz 切換頻率可與較小電路尺寸的電感器搭配使用。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
WSON (DSS) 12 Ultra Librarian

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