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步進馬達驅動器

DRV8845

現行

具備智慧調諧技術之 35-V、1.5-A 四路全橋馬達驅動器

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產品規格表

DRV8845

現行
產品規格表 立即訂購

產品詳細資料

Vs ABS (max) (V) 40 Vs (min) (V) 4.5 Peak output current (A) 2.5 Control mode PWM Control interface Hardware (GPIO) Number of full bridges 4 Full-scale current (A) 1.5 RDS(ON) (HS + LS) (mΩ) 900 Sleep current (µA) 2 Decay mode Smart Tune Features Current Regulation, Smart Tune Rating Catalog Operating temperature range (°C) -40 to 125
Vs ABS (max) (V) 40 Vs (min) (V) 4.5 Peak output current (A) 2.5 Control mode PWM Control interface Hardware (GPIO) Number of full bridges 4 Full-scale current (A) 1.5 RDS(ON) (HS + LS) (mΩ) 900 Sleep current (µA) 2 Decay mode Smart Tune Features Current Regulation, Smart Tune Rating Catalog Operating temperature range (°C) -40 to 125
VQFN (RHH) 36 36 mm² (6 mm × 6 mm)

  • Integrates four H-bridges
  • Can drive different configurations -
    • Two stepper motors
    • Four brushed-DC motors

    • Three brushed-DC motors

    • One stepper and two brushed-DC motors

    • One stepper and one brushed-DC motor

  • Footprint and software compatible with similar drivers from other vendors
  • 4.5-V to 38-V Operating supply voltage range
  • Low RDS(ON): 900 mΩ HS + LS at 24 V, 25°C
  • 1.5-A full-scale current Per Bridge
  • Industry standard PHASE/Ixx Interface

  • Synchronous rectification

  • Full, 1/2 and 1/4 step operation for stepper motors

  • Forward, reverse and coast modes for DC motors

  • Smart tune decay for smooth and quiet operation

  • Supports 3.3 V and 5 V logic inputs

  • Protection features

    • VM undervoltage lockout (UVLO)
    • Charge pump undervoltage (CPUV)
    • Overcurrent protection (OCP)
    • Thermal shutdown (OTSD)

  • Integrates four H-bridges
  • Can drive different configurations -
    • Two stepper motors
    • Four brushed-DC motors

    • Three brushed-DC motors

    • One stepper and two brushed-DC motors

    • One stepper and one brushed-DC motor

  • Footprint and software compatible with similar drivers from other vendors
  • 4.5-V to 38-V Operating supply voltage range
  • Low RDS(ON): 900 mΩ HS + LS at 24 V, 25°C
  • 1.5-A full-scale current Per Bridge
  • Industry standard PHASE/Ixx Interface

  • Synchronous rectification

  • Full, 1/2 and 1/4 step operation for stepper motors

  • Forward, reverse and coast modes for DC motors

  • Smart tune decay for smooth and quiet operation

  • Supports 3.3 V and 5 V logic inputs

  • Protection features

    • VM undervoltage lockout (UVLO)
    • Charge pump undervoltage (CPUV)
    • Overcurrent protection (OCP)
    • Thermal shutdown (OTSD)

The DRV8845 is a quad full-bridge driver for a wide variety of industrial applications. The device can be used for driving up to two stepper motors or up to four brushed-DC motors. Each full-bridge output is rated up to 1.5 A and 38 V. The DRV8845 includes pulse width modulation (PWM) current regulators, along with 2- bit nonlinear DACs (digital-to-analog converters) that allow stepper motors to be controlled in full, half, and quarter steps; and DC motors in forward, reverse, and coast modes.

The PWM current regulator uses the smart tune decay mode for motor audible noise and vibration reduction, increased accuracy, and reduced power dissipation. Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation.

Protection features include thermal shutdown with hysteresis (OTSD), undervoltage lockout (UVLO) and overcurrent protection (OCP). Special power up sequencing is not required.

The DRV8845 is supplied in a 6 mm x 6 mm, 36 pin QFN package with exposed pad for enhanced thermal performance.

The DRV8845 is a quad full-bridge driver for a wide variety of industrial applications. The device can be used for driving up to two stepper motors or up to four brushed-DC motors. Each full-bridge output is rated up to 1.5 A and 38 V. The DRV8845 includes pulse width modulation (PWM) current regulators, along with 2- bit nonlinear DACs (digital-to-analog converters) that allow stepper motors to be controlled in full, half, and quarter steps; and DC motors in forward, reverse, and coast modes.

The PWM current regulator uses the smart tune decay mode for motor audible noise and vibration reduction, increased accuracy, and reduced power dissipation. Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation.

Protection features include thermal shutdown with hysteresis (OTSD), undervoltage lockout (UVLO) and overcurrent protection (OCP). Special power up sequencing is not required.

The DRV8845 is supplied in a 6 mm x 6 mm, 36 pin QFN package with exposed pad for enhanced thermal performance.
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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 DRV8845: 38 V, 1.5 A Quad H-Bridge Motor Driver with Smart Tune Technology datasheet (Rev. A) PDF | HTML 2023/12/13
Product overview Brushed and Stepper Motor Drivers in Video Surveillance PDF | HTML 2024/2/22
Product overview Two New Dual-Stepper Motor Drivers PDF | HTML 2024/2/22
證書 DRV8845EVM EU RoHS Declaration of Conformity (DoC) 2023/3/28

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開發板

DRV8845EVM — 適用於具有智慧調諧技術的四路全橋馬達驅動器的 DRV8845 評估模組

DRV8845 是適用於各種工業應用的四路全橋驅動器。此裝置可用於驅動最多兩個步進馬達或最多四個有刷 DC 馬達。每個全橋輸出的額定值高達 1.5 A 與 38 V。此驅動器提供智慧型調諧衰退模式，使運作過程順暢安靜。此驅動器中的防護功能包括具磁滯 (OTSD) 的過熱自動關機、欠壓閉鎖 (UVLO) 和過電流防護 (OCP)。
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