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TPS54231

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具有 Eco-mode™ 的 3.5V 至 28V 输入、2A、570kHz 降压转换器

产品详情

Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 28 Vin (min) (V) 3.5 Vout (max) (V) 25 Vout (min) (V) 0.8 Features Adjustable soft start, Enable, Light-load efficiency, UVLO adjustable Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000075 Duty cycle (max) (%) 90
Rating Catalog Topology Buck Iout (max) (A) 2 Vin (max) (V) 28 Vin (min) (V) 3.5 Vout (max) (V) 25 Vout (min) (V) 0.8 Features Adjustable soft start, Enable, Light-load efficiency, UVLO adjustable Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000075 Duty cycle (max) (%) 90
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • 3.5- to 28-V Input Voltage Range
  • Adjustable Output Voltage Down to 0.8 V
  • Integrated 80-mΩ High-Side MOSFET
    Supports up to 2 A Continuous Output
    Current
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode™
  • Fixed 570-kHz Switching Frequency
  • Typical 1-µA Shutdown Quiescent
    Current
  • Adjustable Slow-Start Limits Inrush
    Currents
  • Programmable UVLO Threshold
  • Overvoltage Transient Protection
  • Cycle-by-Cycle Current Limit, Frequency
    Fold Back and Thermal Shutdown Protection
  • Available in Easy-to-Use SOIC8 Package
  • Supported by WEBENCH® Software Tool
    (www.TI.com/WEBENCH)
  • APPLICATIONS
    • Consumer Applications such as Set-Top Boxes,
      CPE Equipment, LCD Displays, Peripherals, and
      Battery Chargers
    • Industrial and Car Audio Power Supplies
    • 5-V, 12-V and 24-V Distributed Power Systems

WEBENCH Is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners

  • 3.5- to 28-V Input Voltage Range
  • Adjustable Output Voltage Down to 0.8 V
  • Integrated 80-mΩ High-Side MOSFET
    Supports up to 2 A Continuous Output
    Current
  • High Efficiency at Light Loads with a
    Pulse Skipping Eco-mode™
  • Fixed 570-kHz Switching Frequency
  • Typical 1-µA Shutdown Quiescent
    Current
  • Adjustable Slow-Start Limits Inrush
    Currents
  • Programmable UVLO Threshold
  • Overvoltage Transient Protection
  • Cycle-by-Cycle Current Limit, Frequency
    Fold Back and Thermal Shutdown Protection
  • Available in Easy-to-Use SOIC8 Package
  • Supported by WEBENCH® Software Tool
    (www.TI.com/WEBENCH)
  • APPLICATIONS
    • Consumer Applications such as Set-Top Boxes,
      CPE Equipment, LCD Displays, Peripherals, and
      Battery Chargers
    • Industrial and Car Audio Power Supplies
    • 5-V, 12-V and 24-V Distributed Power Systems

WEBENCH Is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners

The TPS54231 device is a 2-V, 2-A non-synchronous buck converter that integrates a low RDS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode™ feature is automatically activated. Furthermore, the 1-µA shutdown supply current allows the device to be used in battery powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the hysteresis of the input undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle-by-cycle current limit scheme, frequency fold back and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54231 device is available in an 8-pin SOIC package that has been internally optimized to improve thermal performance.

The TPS54231 device is a 2-V, 2-A non-synchronous buck converter that integrates a low RDS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode™ feature is automatically activated. Furthermore, the 1-µA shutdown supply current allows the device to be used in battery powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the hysteresis of the input undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle-by-cycle current limit scheme, frequency fold back and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54231 device is available in an 8-pin SOIC package that has been internally optimized to improve thermal performance.

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技术文档

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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 TPS54231 2-A, 28-V Input, Step-Down DC-DC Converter With Eco-mode™ 数据表 (Rev. D) PDF | HTML 2014-10-24
应用手册 Low Dropout Operation in a Buck Converter (Rev. A) 2019-4-1
选择指南 电源管理指南 2018 2018-7-31
应用手册 800VA Pure Sine Wave Inverter's Reference Design (Rev. A) PDF | HTML 2017-8-1
应用手册 Using TPS54335A to Create an Inverting Power Supply (Rev. A) 2017-7-19
应用手册 Understanding Eco-mode(TM) Operation 2016-12-5
应用手册 Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) 2012-10-26
应用手册 Designing Type III Compensation for Current Mode Step-Down Converters (Rev. A) 2010-9-15

设计与开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

评估板

TPS54231EVM-372 — TPS54231EVM-372 2A, 3.5V to 28V Input SWIFT (tm) Converter Evaluation Module

TPS54231EVM-372 是一款组装完备且经过测试的电路,用于评估 TPS54231 同步降压 SWIFT™ 转换器。此 EVM 可将 7V 至 28V 的输入电压转换为 3.3V 的稳压输出电压,输出电流最高为 2A。开关频率在内部设置为 570kHz 的标称值。TPS54231 封装内部采用了高侧 MOSFET 以及栅极驱动电路。MOSFET 的低漏源导通电阻有助于 TPS54231 实现高效率,并在输出电流较高的情况下帮助保持低结温。补偿组件位于集成电路 (IC) 外部,而外部除法器能实现可调节的输出电压。此外,TPS54231 还提供可调节慢启动和欠压锁定输入。

用户指南: PDF | HTML
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仿真模型

TPS54231 TINA-TI Transient Reference Design

SLUM343.TSC (152 KB) - TINA-TI 参考设计
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TPS54231 TINA-TI Transient Spice Model

SLUM342.ZIP (18 KB) - TINA-TI Spice 模型
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仿真模型

TPS54231 Unencrypted PSpice Transient Model Package (Rev. A)

SLUM255A.ZIP (40 KB) - PSpice 模型
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计算工具

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计算工具

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SWIFTPosNeg-CALC Excel 表格是 SLVA369 应用手册的辅助工作表。

此工作表用于计算使用降压开关稳压器和模拟现成的耦合电感器创建一个双路输出(即正负输出)电源所需的外部组件。

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参考设计

TIDA-010055 — 适用于保护继电器模块且具有诊断功能的非隔离式电源架构参考设计

该参考设计展示了适用于具有模拟输入/输出和通信模块的保护继电器的非隔离式电源架构,这些模块通过 5V、12V 或 24V 直流输入生成。为了生成电源,该设计针对尺寸和设计时间受限的应用使用带集成 FET 的直流/直流转换器和带集成电感器的电源模块,并针对需要低 EMI 和线性稳压器 (LDO) 以实现低纹波的应用采用 HotRod™ 封装类型。保护措施包括用于输入瞬态保护的平缓钳位 TVS,用于过载保护且具有可配置负载电流的电子保险丝,以及用于输入反转保护的理想二极管控制器。其他功能包括自动切换电源多路复用器、模拟温度传感器、输入正常指示、“空载”检测和电压监控器。
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参考设计

TIDEP0036 — 使用 TMS320C6657 实现高效 OPUS 编解码器解决方案的参考设计

TIDEP0036 参考设计提供了一个在 TMS320C6657 器件上轻松运行 TI 优化型 Opus 编码器/解码器的示例。由于 Opus 支持多种比特率、帧大小和采样率,所有这些都具有较低的延迟,因此它适用于语音通信、联网音频甚至高性能音频处理应用。   此设计还重点介绍了在 DSP 上实施 Opus 编解码器时与在 ARM 等通用处理器上实施 Opus 编解码器时所实现的性能改进。  根据常规用途处理器上运行的代码的优化级别,在 C66x TI DSP 内核上实现 Opus 编解码器的性能可以是 ARM CORTEX A-15 实现方案的 3 倍。TMS320C66x DSP (...)

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SOIC (D) 8 Ultra Librarian

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