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LM5121-Q1

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具有断开开关控制的汽车类、3V 至 65V 宽输入电压、电流模式同步升压控制器

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LM5121-Q1

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产品详情

Rating Automotive Topology Boost, Flyback, Forward, SEPIC Vin (max) (V) 65 Vin (min) (V) 3 Vout (max) (V) 100 Vout (min) (V) 3 Control mode current mode Features Enable, Frequency synchronization, Synchronous rectification Duty cycle (max) (%) 100 Iq (typ) (A) 0.004 Operating temperature range (°C) -40 to 125
Rating Automotive Topology Boost, Flyback, Forward, SEPIC Vin (max) (V) 65 Vin (min) (V) 3 Vout (max) (V) 100 Vout (min) (V) 3 Control mode current mode Features Enable, Frequency synchronization, Synchronous rectification Duty cycle (max) (%) 100 Iq (typ) (A) 0.004 Operating temperature range (°C) -40 to 125
HTSSOP (PWP) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • AEC-Q100 Qualified with the following results:
    • Device Temperature Grade 1: –40°C to +125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Maximum Input Voltage: 65 V
  • Min Input Voltage: 3.0 V (4.5 V for startup)
  • Output Voltage Up to 100 V
  • Bypass (VOUT = VIN) Operation
  • 1.2-V Reference with ±1.0% Accuracy
  • Free-Run/Synchronizable up to 1 MHz
  • Peak Current Mode Control
  • Robust Integrated 3-A Gate Drivers
  • Adaptive Dead-Time Control
  • Optional Diode Emulation Mode
  • Programmable Cycle-by-Cycle Current Limit
  • Programmable Line UVLO
  • Programmable Soft-Start
  • Thermal Shutdown Protection
  • Low Shutdown Quiescent Current: 9 µA
  • Programmable Slope Compensation
  • Programmable Skip Cycle Mode Reduces
    Standby Power
  • Supports External VCC Bias Supply Option
  • Load Disconnection in Shutdown Mode (True
    Shutdown)
  • Inrush Current Limiting
  • Hiccup Mode Short Circuit/Overload Protection
  • Circuit Breaker Function
  • Capable of Input Transient Suppression
  • Capable of Reverse Battery Protection
  • Thermally Enhanced 20-Pin HTSSOP
  • AEC-Q100 Qualified with the following results:
    • Device Temperature Grade 1: –40°C to +125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Maximum Input Voltage: 65 V
  • Min Input Voltage: 3.0 V (4.5 V for startup)
  • Output Voltage Up to 100 V
  • Bypass (VOUT = VIN) Operation
  • 1.2-V Reference with ±1.0% Accuracy
  • Free-Run/Synchronizable up to 1 MHz
  • Peak Current Mode Control
  • Robust Integrated 3-A Gate Drivers
  • Adaptive Dead-Time Control
  • Optional Diode Emulation Mode
  • Programmable Cycle-by-Cycle Current Limit
  • Programmable Line UVLO
  • Programmable Soft-Start
  • Thermal Shutdown Protection
  • Low Shutdown Quiescent Current: 9 µA
  • Programmable Slope Compensation
  • Programmable Skip Cycle Mode Reduces
    Standby Power
  • Supports External VCC Bias Supply Option
  • Load Disconnection in Shutdown Mode (True
    Shutdown)
  • Inrush Current Limiting
  • Hiccup Mode Short Circuit/Overload Protection
  • Circuit Breaker Function
  • Capable of Input Transient Suppression
  • Capable of Reverse Battery Protection
  • Thermally Enhanced 20-Pin HTSSOP

The LM5121 is a synchronous boost controller intended for high-efficiency, high-power boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.

The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved using two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions.

The LM5121 provides disconnection switch control which completely disconnects the output from the input during an output short or a shutdown condition. During start-up sequence, inrush current is limited by the disconnection switch control.

An internal charge pump allows 100% duty cycle operation of the high-side synchronous switch (Bypass operation). Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.

The LM5121 is a synchronous boost controller intended for high-efficiency, high-power boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.

The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved using two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions.

The LM5121 provides disconnection switch control which completely disconnects the output from the input during an output short or a shutdown condition. During start-up sequence, inrush current is limited by the disconnection switch control.

An internal charge pump allows 100% duty cycle operation of the high-side synchronous switch (Bypass operation). Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.
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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LM5121/-Q1 Wide Input Synchronous Boost Controller with Disconnection Switch Control 数据表 (Rev. C) PDF | HTML 2016-6-14
模拟设计期刊 Designing the front-end DC/DC conversion stage to withstand automotive transient 2017-1-18

设计与开发

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评估板

LM5121EVM — 带断开开关评估模块的宽输入电压同步升压控制器

The LM5121EVM evaluation module (EVM) provides the design engineer with a fully functional synchronous boost converter to evaluate the Texas Instruments LM5121 synchronous boost controller IC including disconnection switch control. The EVM provides 12V output at up to 2A current from a 3.0V (5.7V (...)
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仿真模型

LM5121 PSpice Transient Model (Rev. A)

SNVM505A.ZIP (115 KB) - PSpice 模型
支持的产品和硬件
仿真模型

LM5121 TINA-TI Transient Reference Design

SNVMA48.TSC (192 KB) - TINA-TI 参考设计
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仿真模型

LM5121 TINA-TI Transient Spice Model (Rev. A)

SNVMA47A.ZIP (53 KB) - TINA-TI Spice 模型
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仿真模型

LM5121 Unencrypted PSpice Transient Model

SNVM962.ZIP (7 KB) - PSpice 模型
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参考设计

TIDA-01413 — 配备两个 4Gbps 四路解串器的 ADAS 8 通道传感器融合集线器参考设计

该传感器融合集线器参考设计最多允许通过同轴电缆连接四个 200 万像素摄像头和四个雷达模块。该设计利用这些同轴电缆为传感器提供电源、反向通道通信和时钟同步。两个 4Gbps FPD-Link III 四通道解串器支持通过 Samtec 连接器将移动产业处理器接口 (MIPI) 摄像头串行接口 2 (CSI-2) 的双路输出连接到应用处理器。
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封装 引脚 CAD 符号、封装和 3D 模型
HTSSOP (PWP) 20 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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