LT7809

推荐用于新设计

135V同步降压控制器，具备对称灌/拉电流能力及动态可调输出电压编程功能

宽输入范围降压控制器，具有对称的灌电流和拉电流能力及分立式栅极驱动器拓扑结构。

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ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。

概述

  • 宽输入电压 (VIN - VSS)范围：8.0V至135V（绝对最大值140V）
  • 宽输出电压范围：0.8V ≤ VOUT≤ 135V（绝对最大值140V）
  • 动态可调VOUT编程
  • 具备对称灌电流和拉电流能力，以实现VOUT快速上升或下降
  • 分立式输出栅极驱动器，支持可调的开启和关闭驱动强度及短死区时间(35ns)
  • 浮置I/O控制引脚，参考系统地
  • 100%占空比工作
  • 可编程或可同步频率（100kHz至2.5MHz）
  • 32引脚(5mm x 5mm)QFN封装
LT7809
135V同步降压控制器，具备对称灌/拉电流能力及动态可调输出电压编程功能
LT7809 Functional Block Diagram LT7809 Pin Configuration LT7809 Chip Illustration
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工具及仿真模型

LTspice

LTspice中提供以下器件型号：

  • LT7809

LTpowerCAD

LTpowerCAD中提供以下器件的设计工具：

  • LT7809
LTspice

LTspice®是一款强大高效的免费仿真软件、原理图采集和波形观测器，为改善模拟电路的仿真提供增强功能和模型。

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EVAL-LT7809-AZ

135V Buck Controller with Dynamically Adjustable Output Voltage

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产品详情

The evaluation circuit EVAL-LT7809-AZ features the LT7809: a 135V synchronous buck controller with symmetrical sink/source capability and dynamically adjustable output voltage programming. The symmetrical sink and source current capability allow for fast VOUT slewing up and down. Split gate drivers allow for easily adjustable turn-on and turn-off of FETs. Additionally, the IC features low IQ, up to 2.5MHz programmable/ synchronizable switching frequency, and a small 32-lead (5mm x 5mm) QFN package. These features allow for a wide variety of applications including industrial, military, medical, and telecommunications systems.

The EVAL-LT7809-AZ operates from a 16V to 100V input voltage range and generates a 60V, 5A output. Using the VOUTADJ feature, the output voltage can be lowered from60V down to 4V without skipping cycles. The EVAL-LT7809-AZ is set to a 500kHz switching frequency, which results in a small and efficient circuit.

The EVAL-LT7809-AZ supports output voltages from 0.8V to 100V. The evaluation circuit has been designed with 150V FETs. Various FETs of similar footprint can be substituted to fit a wide array of applications.

The EVAL-LT7809-AZ is a high-performance, flexible step-down regulator that can adjust its output voltage on-the-fly. The LT7809 data sheet gives a complete description of this part, its operation, and application information. The data sheet must be read in conjunction with this user guide for the EVAL-LT7809-AZ.

Design files for this circuit board are available at www.analog.com.
EVAL-LT7809-AZ
135V Buck Controller with Dynamically Adjustable Output Voltage
EVAL-LT7809-AZ Angle Evaluation Board Photo EVAL-LT7809-AZ Bottom Angle Evaluation Board Photo EVAL-LT7809-AZ Top Evaluation Board Photo EVAL-LT7809-AZ Bottom Evaluation Board Photo

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