概述
样片和购买
解决方案
资源
工具与软件
质量与可靠性
eDesignSuite
开始
Partner products
Sales Briefcase
  • The L9945 is an 8-channel MOSFET pre-driver configurable for low-side, high-side, peak and hold and H-Bridge load control. It is designed to comply with the requirements of 12 V (passenger vehicle) and 24 V (commercial vehicle) battery systems.

    All outputs can be PWM controlled. Six outputs are capable of driving safety relevant loads. One output can be dedicated to the actuation of safety relevant loads requiring a dedicated enable pin (EN6).
    The device offers the possibility of controlling two independent H-Bridges.
    The device can also drive up to two loads requiring "peak & hold" control strategy.
    The driver outputs are protected against short circuit condition.
    The device protects the external MOS in case of an overcurrent event.
    Each output provides full diagnostic information such as short to battery, short to ground and open-load. Each output status can be constantly monitored through dedicated SPI registers.
    The voltage slew rate of the external transistors 1-8 is controlled during turn ON and turn OFF in order to improve EMI behavior.
    A double, redundant, external disable source is available through DIS and NDIS pins in order to improve safety.
    The device is configurable via SPI through a 32-bit protocol.

    主要特性

    • AEC-Q100 qualified
    • 12 V and 24 V battery systems compliance
    • 3.3 V and 5 V logic compatible I/O
    • 8-channel configurable MOSFET pre-driver
      • High-side (N-channel and P-channel MOS)
      • Low-side (N-channel MOS)
      • H-bridge (up to 2 H-bridge)
      • Peak & Hold (2 loads)
    • Operating battery supply voltage 3.8 V to 36 V
    • Operating VDD supply voltage 4.5 V to 5.5 V
    • All device pins, except the ground pins, withstand at least 40 V
    • Programmable gate charge/discharge currents for improving EMI behavior
    • Individual diagnosis for:
      • Short circuit to battery
      • Open load
      • Short circuit to ground
    • Highly flexible overcurrent sensing implementation
      • Possibility of monitoring external MOS drain to source voltage
      • Possibility of monitoring voltage on external shunt resistor
      • 64 programmable overcurrent thresholds independent for each channel
      • Ultra-fast output shutdown in case of overcurrent
    • Current limitation for H-Bridge configuration
    • 32-bit SPI protocol available for configuration and diagnostics
      • Failures latched even if they occur during diagnostics reading
      • Daisy chain operation
      • SDO protected against overvoltage
    • Safety features
      • Fast switch off redundant output disable through two external pins
      • Built In Self Test (BIST) for logic operation
      • Hardware Self Check (HWSC) for VDD5 overvoltage comparator
      • Configurable Communication Check (CC) watchdog timer available
      • Disable feedback through bi-directional pin
      • Highly redundant output monitoring through dedicated SPI registers
    • 10-bit ADC for battery and die temperature measurements available through SPI
    • VDD5 monitoring for over/under voltage
    • VPS (battery) monitoring for under voltage
    • ISO26262 systems compatible

评估工具

    • 产品型号

      L9945发动机管理系统的评估板

00 选择要下载的文档

技术文档

    • 描述 版本 文档大小 操作
      DS12275
      Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems
      8.0
      1.52 MB
      PDF
      DS12275

      Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems

    • 描述 版本 文档大小 操作
      AN5074
      Charge pump stress estimation in switching applications
      1.0
      1.84 MB
      PDF
      AN5078
      Criteria for configuring L9945 diagnostic parameters in automotive switching applications
      1.1
      3.86 MB
      PDF
      AN5084
      How to improve EMI behavior in switching applications
      1.0
      4.69 MB
      PDF
      AN5402
      L9945 H-Bridge direction switching recommendations
      1.0
      966.89 KB
      PDF
      AN5311
      L9945 in H-bridge configuration
      1.2
      700.05 KB
      PDF
      AN5074

      Charge pump stress estimation in switching applications

      AN5078

      Criteria for configuring L9945 diagnostic parameters in automotive switching applications

      AN5084

      How to improve EMI behavior in switching applications

      AN5402

      L9945 H-Bridge direction switching recommendations

      AN5311

      L9945 in H-bridge configuration

质量与可靠性

产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
L9945
批量生产
TQFP 64 10x10x1.0 Automotive Ecopack2
L9945TR
批量生产
TQFP 64 10x10x1.0 Automotive Ecopack2

L9945

Package:

TQFP 64 10x10x1.0

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

TQFP 64 10x10x1.0

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L9945TR

Package:

TQFP 64 10x10x1.0

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

TQFP 64 10x10x1.0

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此,它们可能不是100%适用于特定的设备。有关特定设备的信息,请联系 销售支持

样片和购买

产品型号
从分销商订购
从ST订购
封装
包装类型
Operating Temperature (°C) (min)
供货状态
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
L9945TR Available at 2 distributors

...的经销商可用性L9945TR

代理商名称
地区 Stock 最小订购量 第三方链接
DIGIKEY WORLDWIDE 800 1 马上订购
MOUSER WORLDWIDE 562 1 马上订购

代理商库存报告日期: 2020-07-03

代理商名称

DIGIKEY

Stock

800

Min.Order

1

地区

WORLDWIDE 马上订购

MOUSER

Stock

562

Min.Order

1

地区

WORLDWIDE 马上订购

代理商库存报告日期: 2020-07-03

立即购买 TQFP 64 10x10x1.0 Tape And Reel -
批量生产
EAR99 MALAYSIA 4.5 / 1k
L9945 没有经销商,请联系我们的销售办事处 TQFP 64 10x10x1.0 Tray -
批量生产
EAR99 MALAYSIA 4.5 / 1k

L9945TR

封装

TQFP 64 10x10x1.0

包装类型

Tape And Reel

Budgetary Price (US$)*/Qty

4.5 / 1k

...的经销商可用性L9945TR

代理商名称
地区 Stock 最小订购量 第三方链接
DIGIKEY WORLDWIDE 800 1 马上订购
MOUSER WORLDWIDE 562 1 马上订购

代理商库存报告日期: 2020-07-03

代理商名称

DIGIKEY

Stock

800

Min.Order

1

地区

WORLDWIDE 马上订购

MOUSER

Stock

562

Min.Order

1

地区

WORLDWIDE 马上订购

代理商库存报告日期: 2020-07-03

Operating Temperature (°C)

(最小值)

-

供货状态

批量生产

Budgetary Price (US$)* / Qty

4.5 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L9945

封装

TQFP 64 10x10x1.0

包装类型

Tray

Budgetary Price (US$)*/Qty

4.5 / 1k

Operating Temperature (°C)

(最小值)

-

供货状态

批量生产

Budgetary Price (US$)* / Qty

4.5 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商