L99LD21

批量生产
Design Win

高功率LED驱动器,用于汽车应用

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产品概述

描述

The L99LD21 is a flexible LED driver, which is specifically designed for the control of two independent high brightness LED strings for automotive front lighting applications. It consists of a high efficiency monolithic boost controller and a dual buck converter.

The boost controller integrates a high current gate driver for an external n-channel mosfet. It delivers a constant output voltage, up to 60 V, which supplies the inputs of the two integrated or external buck converters.

The boost controller of two devices can be stacked, in order to operate in dual phase for high power applications, with an interleaving pattern for an improved input current ripple.

The buck converters integrate n-channel mosfet which is driven by a bootstrap circuit.

  • 所有功能

    • AEC-Q100 qualified
    • General
      • ST SPI communication v4.1
      • 5.5 to 24V Operating battery voltage range
      • Load dump protected
      • QFN40L (wettable flanks) with exposed pad
      • Timeout watchdog and limp home function
      • Low standby current
    • Boost Section
      • Fixed frequency architecture, programmable by SPI
      • Peak current mode control
      • Dual phase operation supported
      • Input current limitation
      • Soft start
      • Overvoltage protection (OVP)
      • Short feedback failure protection
      • Constant voltage control
    • Buck section
      • Integrated switching mosfets
      • Lossless current sensing without need of external components
      • Very accurate LED current setting programming inductor's peak current and peak-to-peak current ripple
      • Adjustable peak current by SPI
      • Adjustable current ripple by SPI
      • Integrated PWM generation unit with 10-bit resolution and phase shift
      • Peak current control
      • Constant VLED x TOFF architecture
    • Protection and diagnostic
      • Battery under voltage
      • Temperature warning (2 thresholds)
      • Overtemperature shutdown
      • LED voltage digital feedback through SPI
      • Buck outputs short circuit and open load protection

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EDA符号、封装和3D模型

STMicroelectronics - L99LD21

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质量与可靠性

产品型号 Marketing Status 等级规格 符合RoHS级别 材料声明**
L99LD21Q6TR
批量生产
VFQFPN 6X6 汽车应用 Ecopack2

L99LD21Q6TR

Package:

VFQFPN 6X6

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

VFQFPN 6X6

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

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L99LD21Q6TR
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经销商的可用性 L99LD21Q6TR

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L99LD21Q6TR 批量生产

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产品型号:

L99LD21Q6TR

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(*) 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