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DC/DC 控制器

LM34966-Q1

現行

500-kHz 大範圍 VIN 非同步升壓、返馳和 SEPIC 控制器

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產品規格表

LM34966-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Topology Boost, Flyback, SEPIC Vin (max) (V) 40 Vin (min) (V) 1.5 Vout (max) (V) 300 Vout (min) (V) 1.5 Control mode current mode Features Adjustable current limit, Enable, Light-load efficiency, Nonsynchronous rectification, Power good, UVLO adjustable Duty cycle (max) (%) 93 Iq (typ) (A) 0.00049 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
Rating Automotive Topology Boost, Flyback, SEPIC Vin (max) (V) 40 Vin (min) (V) 1.5 Vout (max) (V) 300 Vout (min) (V) 1.5 Control mode current mode Features Adjustable current limit, Enable, Light-load efficiency, Nonsynchronous rectification, Power good, UVLO adjustable Duty cycle (max) (%) 93 Iq (typ) (A) 0.00049 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
HTSSOP (PWP) 14 32 mm² (5 mm × 6.4 mm)
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C TA
    • Maximum operating temperature 150°C TJ
  • Functional Safety-Capable
  • Suited for wide input operating range car battery applications
    • 3.5-V to 40-V operating range (45-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 45 V
    • Minimized battery drain
      • Low shutdown current ( IQ ≤ 2.6 µA )
      • Low operating current ( IQ ≤ 490 µA )
  • Small solution size and low cost
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
    • Minimized undershoot during cranking (start-stop application)
  • Higher efficiency with low-power dissipation
    • 100-mV ±7% accurate current limit threshold
    • Strong 1.0-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 500 kHz
  • Integrated protection features
    • Constant peak current limiting over input voltage
    • Hiccup mode overload protection
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • Accurate ±1% accuracy feedback reference
  • Programmable extra slope compensation
  • Adjustable soft start
  • PGOOD indicator
  • 14-Pin HTSSOP package (5.0 mm × 4.4 mm)
  • Create a custom design using the LM34966-Q1 with the WEBENCH power designer
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C to +125°C TA
    • Maximum operating temperature 150°C TJ
  • Functional Safety-Capable
  • Suited for wide input operating range car battery applications
    • 3.5-V to 40-V operating range (45-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 45 V
    • Minimized battery drain
      • Low shutdown current ( IQ ≤ 2.6 µA )
      • Low operating current ( IQ ≤ 490 µA )
  • Small solution size and low cost
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
    • Minimized undershoot during cranking (start-stop application)
  • Higher efficiency with low-power dissipation
    • 100-mV ±7% accurate current limit threshold
    • Strong 1.0-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 500 kHz
  • Integrated protection features
    • Constant peak current limiting over input voltage
    • Hiccup mode overload protection
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • Accurate ±1% accuracy feedback reference
  • Programmable extra slope compensation
  • Adjustable soft start
  • PGOOD indicator
  • 14-Pin HTSSOP package (5.0 mm × 4.4 mm)
  • Create a custom design using the LM34966-Q1 with the WEBENCH power designer

The LM34966-Q1 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 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 internal VCC regulator also supports BIAS pin operation up to 40 V (45-V absolute maximum) for automotive load dump. The switching frequency is dynamically programmable with an external resistor from 100 kHz to 500 kHz.

The LM34966-Q1 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 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 internal VCC regulator also supports BIAS pin operation up to 40 V (45-V absolute maximum) for automotive load dump. The switching frequency is dynamically programmable with an external resistor from 100 kHz to 500 kHz.

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LM5156H-Q1 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 LM34966-Q1 is a reduced specification version of LM5156H-Q1

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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 LM34966-Q1 500kHz Wide VIN Non-synchronous Boost/SEPIC/Flyback Controller datasheet PDF | HTML 2020/9/23
功能安全資訊 LM34966-Q1, LM5156x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution (Rev. C) PDF | HTML 2021/4/28
證書 LM34966EVM-FLY EU Declaration of Conformity (DoC) 2020/9/10

設計與開發

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開發板

LM34966EVM-FLY — LM34966 返馳式控制器評估模組

LM34966EVM-FLY 評估模組展示了 LM34966-Q1 做為廣泛輸入非同步返馳控制器的功能和性能。標準配置的設計可在 18 V 至 36 V 輸入，在 250 kHz 下切換時，在 4 A 時提供 5 V 的穩壓輸出。此評估模組旨在簡化配置，讓使用者能夠在同一模組上評估多種不同應用。
使用指南: PDF | HTML
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LM34966-Q1 PSpice Transient Model (Rev. B)

SNVMC41B.ZIP (222 KB) - PSpice 模型
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HTSSOP (PWP) 14 Ultra Librarian
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