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标题: 基于TPS62170-Q1采用 2x2 QFN 封装的 3-17V 0.5A 汽车类降压转换器 [打印本页]

作者: iczoom188    时间: 2018-12-12 17:11
标题: 基于TPS62170-Q1采用 2x2 QFN 封装的 3-17V 0.5A 汽车类降压转换器
基于TPS62170-Q1采用 2x2 QFN 封装的 3-17V 0.5A 汽车类降压转换器
  1 特性
  DCS-Control™拓扑
  适用于汽车电子 应用
  具有符合 AEC-Q100 标准的下列结果:
  器件温度等级:-40°C 125°C 的运行结温范围
  器件人体放电模式 (HBM) 静电放电 (ESD) 分类等级 H2
  器件组件充电模式 (CDM) ESD 分类等级 C4B
  输入电压范围:3V 17V
  输出电流高达 500mA
  可调输出电压范围为 0.9V 6V
  固定输出电压版本
  无缝省电模式转换
  静态电流典型值为 17µA
  电源正常输出
  100% 占空比模式
  短路保护
  过热保护
  与 TPS62160-Q1 引脚对引脚兼容
  采用 2 × 2mm WSON-8 封装
  借助 WEBENCH® 电源设计器并使用 TPS62170-Q1 创建定制设计方案
  2 应用
  汽车类 12V 导轨式电源
  同轴电缆供电 POL 电源
  摄像机模块、视频模块
  低压降稳压器 (LDO)
  3 说明
  TPS6217x-Q1 系列是一款简单易用的同步降压直流/直流转换器,针对 高功率密度的应用 进行了优化。该器件的开关频率典型值高达 2.25MHz,允许使用小型电感,利用 DCS-Control™ 拓扑技术提供快速瞬态响应并实现高输出电压精度。
  此器件具有 3V 17V 宽运行输入电压范围,非常适用于由锂离子或其它电池以及 12V 中间电源轨供电的系统。其输出电压为 0.9V 6V,支持高达 0.5A 的持续输出电流(使用 100% 占空比模式)
  通过配置使能引脚和开漏电源正常状态引脚也可以实现电源排序。
  在节能模式下,器件可根据输入电压 (VIN) 生成约 17μA 的静态电流。负载较小时可自动且无缝进入节能模式,同时该模式可保持整个负载范围内的高效率。在关断模式下,此器件会关闭且关断期间的流耗少于 2μA
此器件分为可调和固定输出电压型号,采用 2mm × 2mm (DSG) 8 引脚 WSON 封装。
TI产品现货库存在线购买:https://www.iczoom.com/brand/509-c-1-20.html
  The TPS6217x-Q1 synchronous switched mode power converters are based on DCS-Control™ (Direct Control with Seamless transition into power save mode), an advanced regulation topology, that combines the advantages of hysteretic, voltage mode and current mode control including an AC loop directly associated to the output voltage. This control loop takes information about output voltage changes and feeds it directly to a fast comparator stage. It sets the switching frequency, which is constant for steady state operating conditions, and provides immediate response to dynamic load changes. To get accurate DC load regulation, a voltage feedback loop is used. The internally compensated regulation network achieves fast and stable operation with small external components and low ESR capacitors.
  The DCS-ControlTM topology supports PWM (Pulse Width Modulation) mode for medium and heavy load conditions and a Power Save Mode at light loads. During PWM, it operates at its nominal switching frequency in continuous conduction mode. This frequency is typically about 2.25 MHz with a controlled frequency variation depending on the input voltage. If the load current decreases, the converter enters Power Save Mode to sustain high efficiency down to very light loads. In Power Save Mode the switching frequency decreases linearly with the load current. Since DCS-ControlTM supports both operation modes within one single building block, the transition from PWM to Power Save Mode is seamless without effects on the output voltage.





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