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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LMR38020

現行

具 40-µA IQ 的 SIMPLE SWITCHER® 電源轉換器 4.2-V 至 80-V、2-A 同步降壓

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產品規格表

LMR38020

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 4.2 Vin (max) (V) 80 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed Control mode current mode Vout (min) (V) 1 Vout (max) (V) 75 Iq (typ) (A) 0.00004
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 4.2 Vin (max) (V) 80 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, UVLO Fixed Control mode current mode Vout (min) (V) 1 Vout (max) (V) 75 Iq (typ) (A) 0.00004
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.2-V to 80-V input voltage range
    • 2-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • > 1.5-mm distance between VIN and GND pin
    • 200-kHz to 2.2-MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum option for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with pre-biased output
    • ±1.0% tolerance voltage reference at room temperature
    • Precision enable
    • Easy to use device with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 8-pin HSOIC with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
    • Available in 1-A, LMR38010
  • Create a custom design using the LMR38020 with the WEBENCH Power Designer
  • Functional Safety-Capable
  • Configured for rugged industrial applications
    • 4.2-V to 80-V input voltage range
    • 2-A continuous output current
    • Ultra-low 40-µA operating quiescent current
    • > 1.5-mm distance between VIN and GND pin
    • 200-kHz to 2.2-MHz adjustable switching frequency
    • Frequency synchronization to external clock
    • Spread spectrum option for reduced EMI
    • 97% maximum duty cycle
    • Support start-up with pre-biased output
    • ±1.0% tolerance voltage reference at room temperature
    • Precision enable
    • Easy to use device with integrated compensation network enabling low BOM count
    • Integrated synchronous rectification
    • 8-pin HSOIC with PowerPAD™ integrated circuit package
    • PFM and forced PWM (FPWM) options
    • Available in 1-A, LMR38010
  • Create a custom design using the LMR38020 with the WEBENCH Power Designer

The LMR38020 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input industrial applications and MHEV/EV systems.

The LMR38020 uses precision enable to provide flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum for minimal EMI and switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020 is available in an 8-pin HSOIC PowerPAD integrated circuit package.

The LMR38020 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The LMR38020 operates during input voltage dips as low as 4.2 V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input industrial applications and MHEV/EV systems.

The LMR38020 uses precision enable to provide flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status, eliminating the need for an external supervisor. The device incorporates pseudorandom spread spectrum for minimal EMI and switching frequency can be configured between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR38020 is available in an 8-pin HSOIC PowerPAD integrated circuit package.
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類型 標題 日期
* Data sheet LMR38020 4.2-V to 80-V, 2-A, Synchronous SIMPLE SWITCHER Power Converter with 40-µA IQ datasheet (Rev. E) PDF | HTML 2023年 9月 18日
Application note Designing an Isolated Buck Converter using the LMR38020 PDF | HTML 2023年 8月 30日
Application note Auxiliary Power Supply Design Based on LMR38020 Fly-Buck in Solar Micro Inverter PDF | HTML 2023年 8月 29日
EVM User's guide LMR38020EVM User Guide (Rev. A) PDF | HTML 2022年 9月 19日
Functional safety information LMR380x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2021年 11月 2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

LMR38020EVM — 具 40-uA IQ 的 LMR38020 評估模組 SIMPLE SWITCHER 80-V、2-A、2.2-MHz 降壓轉換器

LMR38020EVM 評估模組 (EVM) 是完全組裝且經過測試的電路，用於評估 LMR38020F 降壓轉換器。基板具有跳線連接器，用於指示 POWERGOOD 旗標並與外部時脈同步。基板也具備用於環路量測的 AC 訊號注入端子。
使用指南: PDF | HTML
TI.com 無法提供
開發板

LMR38020QEVM — LMR38020-Q1 評估模組 SIMPLE SWITCHER® 電源轉換器 80-V、2-A 同步降壓 40-µA IQ

LM38020QEVM 評估模組 (EVM) 使用 LMR38020S-Q1，是一款採用同步整流的 80-V DC/DC 降壓穩壓器，可在較小體積中實現高轉換效率。EVM 可在 6 V 至 80 V 的寬輸入電壓範圍內運作，以 400-kHz 切換頻率提供穩壓 5-V 輸出。輸出電壓的設定點準確度高於 1.5%，並可使用外部電阻分壓器進行調節。LMR38020QEVM 符合 LMR38020-Q1 與 LMR38020 降壓轉換器的要求。
使用指南: PDF | HTML
TI.com 無法提供
模擬型號

LMR38020F PSpice Transient Model

SNVMC78.ZIP (288 KB) - PSpice Model
下載
模擬型號

LMR38020S PSpice Transient Model

SNVMC92.ZIP (260 KB) - PSpice Model
下載
參考設計

TIDA-010950 — 具有功率調節和霍爾效應位置感測功能的阻尼器與 EEV 控制器參考設計

此參考設計展示了阻尼器致動器與電子膨脹閥的雙馬達驅動解決方案。多重馬達驅動包含一個雙極步進馬達驅動器、一個由 15VDC 來源運作的無刷 DC 馬達驅動器。此設計顯示出精確的功率限制，有助於輕鬆鑑定為由 IEC 60335-1 定義的低功率電路。此參考設計整合 0-10V 和 4-20mA 控制介面，可控制閥門或阻尼器位置，以及用於精確位置感測的 TMAG5273。
Design guide: PDF
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