首頁 電源管理 DC/DC 開關穩壓器 DC/DC 控制器
首頁
電源管理
DC/DC 開關穩壓器
DC/DC 控制器

LM5121

現行

具中斷連線切換控制的 3-65V 大範圍 VIN 電流模式同步升壓

立即訂購
產品規格表

LM5121

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Boost, Flyback, Forward, SEPIC Vin (max) (V) 65 Vin (min) (V) 3 Vout (max) (V) 100 Vout (min) (V) 3 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light-load efficiency, Synchronous rectification, UVLO adjustable Duty cycle (max) (%) 100 Iq (typ) (A) 0.004 Operating temperature range (°C) -40 to 125
Rating Catalog Topology Boost, Flyback, Forward, SEPIC Vin (max) (V) 65 Vin (min) (V) 3 Vout (max) (V) 100 Vout (min) (V) 3 Control mode current mode Features Adjustable current limit, Enable, Frequency synchronization, Light-load efficiency, Synchronous rectification, UVLO adjustable Duty cycle (max) (%) 100 Iq (typ) (A) 0.004 Operating temperature range (°C) -40 to 125
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • 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 C6
  • Maximum Input Voltage: 65 V
  • Min Input Voltage: 3.0 V (4.5 V for startup)
  • Output Voltage Up to 100 V
  • Bypass (VOUT = VIN) Operation
  • 1.2-V Reference with ±1.0% Accuracy
  • Free-Run/Synchronizable up to 1 MHz
  • Peak Current Mode Control
  • Robust Integrated 3-A Gate Drivers
  • Adaptive Dead-Time Control
  • Optional Diode Emulation Mode
  • Programmable Cycle-by-Cycle Current Limit
  • Programmable Line UVLO
  • Programmable Soft-Start
  • Thermal Shutdown Protection
  • Low Shutdown Quiescent Current: 9 µA
  • Programmable Slope Compensation
  • Programmable Skip Cycle Mode Reduces
    Standby Power
  • Supports External VCC Bias Supply Option
  • Load Disconnection in Shutdown Mode (True
    Shutdown)
  • Inrush Current Limiting
  • Hiccup Mode Short Circuit/Overload Protection
  • Circuit Breaker Function
  • Capable of Input Transient Suppression
  • Capable of Reverse Battery Protection
  • Thermally Enhanced 20-Pin HTSSOP
  • 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 C6
  • Maximum Input Voltage: 65 V
  • Min Input Voltage: 3.0 V (4.5 V for startup)
  • Output Voltage Up to 100 V
  • Bypass (VOUT = VIN) Operation
  • 1.2-V Reference with ±1.0% Accuracy
  • Free-Run/Synchronizable up to 1 MHz
  • Peak Current Mode Control
  • Robust Integrated 3-A Gate Drivers
  • Adaptive Dead-Time Control
  • Optional Diode Emulation Mode
  • Programmable Cycle-by-Cycle Current Limit
  • Programmable Line UVLO
  • Programmable Soft-Start
  • Thermal Shutdown Protection
  • Low Shutdown Quiescent Current: 9 µA
  • Programmable Slope Compensation
  • Programmable Skip Cycle Mode Reduces
    Standby Power
  • Supports External VCC Bias Supply Option
  • Load Disconnection in Shutdown Mode (True
    Shutdown)
  • Inrush Current Limiting
  • Hiccup Mode Short Circuit/Overload Protection
  • Circuit Breaker Function
  • Capable of Input Transient Suppression
  • Capable of Reverse Battery Protection
  • Thermally Enhanced 20-Pin HTSSOP

The LM5121 is a synchronous boost controller intended for high-efficiency, high-power boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.

The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved using two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions.

The LM5121 provides disconnection switch control which completely disconnects the output from the input during an output short or a shutdown condition. During start-up sequence, inrush current is limited by the disconnection switch control.

An internal charge pump allows 100% duty cycle operation of the high-side synchronous switch (Bypass operation). Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.

The LM5121 is a synchronous boost controller intended for high-efficiency, high-power boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.

The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved using two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions.

The LM5121 provides disconnection switch control which completely disconnects the output from the input during an output short or a shutdown condition. During start-up sequence, inrush current is limited by the disconnection switch control.

An internal charge pump allows 100% duty cycle operation of the high-side synchronous switch (Bypass operation). Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.
filter 尋找其它 DC/DC 控制器
下載 觀看有字幕稿的影片 影片

技術文件

star =TI 所選的此產品重要文件
找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 6
重要文件 類型 標題 格式選項 日期
* Data sheet LM5121/-Q1 Wide Input Synchronous Boost Controller with Disconnection Switch Control datasheet (Rev. C) PDF | HTML 2016年 6月 14日
Analog Design Journal Designing the front-end DC/DC conversion stage to withstand automotive transient 2017年 1月 18日
Application note Designing Fault Protection Circuits Using Wide VIN LM5121 2015年 1月 12日
White paper How to design boost, SEPIC or flyback regulators with wide VIN power ICs 2014年 7月 29日
Application note Practical Feedback Loop Analysis for Current-Mode Boost Converter 2014年 3月 7日
Application note Automated Frequency Response Analyzer 2013年 10月 9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

LM5121EVM — 具有中斷連線切換的廣泛 Vin 同步升壓控制器評估模組

The LM5121EVM evaluation module (EVM) provides the design engineer with a fully functional synchronous boost converter to evaluate the Texas Instruments LM5121 synchronous boost controller IC including disconnection switch control. The EVM provides 12V output at up to 2A current from a 3.0V (5.7V (...)
使用指南: PDF
TI.com 無法提供
模擬型號

LM5121 PSpice Transient Model (Rev. A)

SNVM505A.ZIP (115 KB) - PSpice Model
下載
模擬型號

LM5121 TINA-TI Transient Reference Design

SNVMA48.TSC (192 KB) - TINA-TI Reference Design
下載
模擬型號

LM5121 TINA-TI Transient Spice Model (Rev. A)

SNVMA47A.ZIP (53 KB) - TINA-TI Spice Model
下載
模擬型號

LM5121 Unencrypted PSpice Transient Model

SNVM962.ZIP (7 KB) - PSpice Model
下載
參考設計

PMP11422 — 高密度 72W 電池供電同步升壓參考設計

PMP11422 是使用 LM5121 控制器的同步升壓電源供應器。此設計接受 5Vin 至 8.6Vin 的輸入電壓，並升壓至可提供 6A 連續電流的 12Vout 電壓軌。LM5121 整合輸入斷開開關功能，可提供升壓短路保護，裝置會在發生短路事件時關閉開關。
Test report: PDF
電路圖: PDF
參考設計

PMP8673 — 採用 LM5121 的 150W 升壓轉換器參考設計

PMP8673 參考設計為針對高效率進行最佳化，同時維持精巧外型尺寸的同步升壓轉換器。此參考設計具有 34.5-37.5V（額定值為 35V）的電壓輸入範圍，並提供 55.5V 的輸出電壓。同步升壓拓撲在 2-3A 負載範圍內實現了高於 97% 的效率。切換頻率設定為 400kHz，允許使用較小的外部元件和總面積小於 60 平方公分的電路板。
Test report: PDF
電路圖: PDF
參考設計

PMP9297 — 適用於 GaN 音訊應用的 150W 雙通道同步升壓

PMP9297 是適合 GaN 音訊放大器應用的雙通道同步升壓轉換器。它可在每通道 150W 下，將 35V 輸入電壓轉換為可調式 38V 至 55V 輸出電壓。解決方案尺寸適合 45mm x 34mm 的電路板面積。在解決方案尺寸面積之外，還包括額外的輸入和輸出大型電容器。此設計使用 TLP0202 雙通道數位電位計，透過 SPI 匯流排編程輸出電壓。使用 LMP8481-S 高壓側電流感測放大器完成輸出電流監控。NTC 熱敏電阻可測量高壓側 MOSFET 的溫度
Test report: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 20 Ultra Librarian
適用 TI 的評估品項標準條款與條件。

訂購與品質

內含資訊：
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中的可靠性監測
內含資訊：
  • 晶圓廠位置
  • 組裝地點

建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片