UCD7242

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数字双通道同步降压功率驱动器

产品详情

Operating temperature range (°C) -40 to 125 Rating Catalog
Operating temperature range (°C) -40 to 125 Rating Catalog
VQFN-HR (RSJ) 32 36 mm² 6 x 6
  • Fully Integrated Power Switches With Drivers
    for Dual Synchronous Buck Converters
  • Full Compatibility With TI Fusion Digital Power Supply
    Controllers, Such as the UCD92xx Family
  • Wide Input Voltage Range: 4.75 V to 18 V
    Operational Down to 2.2 V Input With an External Bias Supply
  • Up to 10A Output Current per Channel
  • Operational to 2 MHz Switching Frequency
  • High Side Current Limit With Current Limit Flag
  • Onboard Regulated 6 V Driver Supply From VIN
  • Thermal Protection
  • Temperature Sense Output – Voltage Proportional to Chip Temperature
  • UVLO and OVLO Circuits Ensure Proper Drive Voltage
  • Rated From –40°C to 125°C Junction Temperature
  • RoHS Compliant
  • Accurate On-Die Current Sensing (±5%)
  • APPLICATIONS
    • Digitally-Controlled Synchronous-Buck Power Stages
    • High Current Dual-Phase VRM/EVRD Regulators for Desktop, Server, Telecom and
      Notebook Processors

  • Fully Integrated Power Switches With Drivers
    for Dual Synchronous Buck Converters
  • Full Compatibility With TI Fusion Digital Power Supply
    Controllers, Such as the UCD92xx Family
  • Wide Input Voltage Range: 4.75 V to 18 V
    Operational Down to 2.2 V Input With an External Bias Supply
  • Up to 10A Output Current per Channel
  • Operational to 2 MHz Switching Frequency
  • High Side Current Limit With Current Limit Flag
  • Onboard Regulated 6 V Driver Supply From VIN
  • Thermal Protection
  • Temperature Sense Output – Voltage Proportional to Chip Temperature
  • UVLO and OVLO Circuits Ensure Proper Drive Voltage
  • Rated From –40°C to 125°C Junction Temperature
  • RoHS Compliant
  • Accurate On-Die Current Sensing (±5%)
  • APPLICATIONS
    • Digitally-Controlled Synchronous-Buck Power Stages
    • High Current Dual-Phase VRM/EVRD Regulators for Desktop, Server, Telecom and
      Notebook Processors

The UCD7242 is a complete power system ready to drive two independent buck power supplies. High side MOSFETs, low side MOSFETs, drivers, current sensing circuitry and necessary protection functions are all integrated into one monolithic solution to facilitate minimum size and maximum efficiency. Driver circuits provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous rectifier in a synchronous buck circuit. The MOSFET gates are driven to +6.25 V by an internally regulated VGG supply. The internal VGG regulator can be disabled to permit the user to supply an independent gate drive voltage. This flexibility allows a wide power conversion input voltage range of 2.2V to 18V. Internal under voltage lockout (UVLO) logic ensures VGG is good before allowing chip operation.

The synchronous rectifier enable (SRE) pin controls whether or not the low-side MOSFET is turned on when the PWM signal is low. When SRE is high the part operates in continuous conduction mode for all loads. In this mode the drive logic block uses the PWM signal to control both the high-side and low-side gate drive signals. Dead time is also optimized to prevent cross conduction. When SRE is low, the part operates in discontinuous conduction mode at light loads. In this mode the low-side MOSFET is always held off.

On-board comparators monitor the current through the high side switch to safeguard the power stage from sudden high current loads. Blanking delay is set for the high side comparator to avoid false reports coincident with switching edge noise. In the event of an over-current fault, the high-side FET is turned off and the Fault Flag (FLT) is asserted to alert the controller.

MOSFET current is measured and monitored by a precision integrated current sense element. This method provides an accuracy of ±5% over most of the load range. The amplified signal is available for use by the controller on the IMON pin.

An on-chip temperature sense converts the die temperature to a voltage at the TMON pin for the controller’s use. If the die temperature exceeds 170°C, the temperature sensor initiates a thermal shutdown that halts output switching and sets the FLT flag. Normal operation resumes when the die temperature falls below the thermal hysteresis band.

The UCD7242 is a complete power system ready to drive two independent buck power supplies. High side MOSFETs, low side MOSFETs, drivers, current sensing circuitry and necessary protection functions are all integrated into one monolithic solution to facilitate minimum size and maximum efficiency. Driver circuits provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous rectifier in a synchronous buck circuit. The MOSFET gates are driven to +6.25 V by an internally regulated VGG supply. The internal VGG regulator can be disabled to permit the user to supply an independent gate drive voltage. This flexibility allows a wide power conversion input voltage range of 2.2V to 18V. Internal under voltage lockout (UVLO) logic ensures VGG is good before allowing chip operation.

The synchronous rectifier enable (SRE) pin controls whether or not the low-side MOSFET is turned on when the PWM signal is low. When SRE is high the part operates in continuous conduction mode for all loads. In this mode the drive logic block uses the PWM signal to control both the high-side and low-side gate drive signals. Dead time is also optimized to prevent cross conduction. When SRE is low, the part operates in discontinuous conduction mode at light loads. In this mode the low-side MOSFET is always held off.

On-board comparators monitor the current through the high side switch to safeguard the power stage from sudden high current loads. Blanking delay is set for the high side comparator to avoid false reports coincident with switching edge noise. In the event of an over-current fault, the high-side FET is turned off and the Fault Flag (FLT) is asserted to alert the controller.

MOSFET current is measured and monitored by a precision integrated current sense element. This method provides an accuracy of ±5% over most of the load range. The amplified signal is available for use by the controller on the IMON pin.

An on-chip temperature sense converts the die temperature to a voltage at the TMON pin for the controller’s use. If the die temperature exceeds 170°C, the temperature sensor initiates a thermal shutdown that halts output switching and sets the FLT flag. Normal operation resumes when the die temperature falls below the thermal hysteresis band.

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类型 标题 下载最新的英语版本 日期
* 数据表 Digital Dual Synchronous-Buck Power Driver.. 数据表 (Rev. B) 2012年 8月 12日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日

设计和开发

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)。

应用软件和框架

FUSION_DIGITAL_POWER_DESIGNER — Digital Power 软件

Fusion Digital Power™ 图形用户界面 (GUI) 软件用于配置和监视精选的德州仪器 (TI) 数字电源控制器以及序列发生器/运行状况监视器。此应用程序使用 PMBus 协议通过 TI USB 适配器经由串行总线与器件进行通信。
应用软件和框架

FUSION_MFR_GUI — Fusion Digital Power 制造工具

The Fusion Digital Power Manufacturing Tool (aka MFR GUI) is a Graphical User Interface used to download firmware, upgrade firmware, configure, calibrate and test .

The MFR GUI supports the same devices as Fusion Digital Power Designer software.  This tool is typically used in manufacturing (...)

参考设计

TIDEP0036 — 采用 TMS320C6657 实现的高效 OPUS 编解码器解决方案参考设计

TIDEP0036 参考设计演示了如何在 TMS320C6657 器件上轻松运行经 TI 优化的 Opus 编码器/解码器。由于 Opus 支持各类比特率、帧大小和采样率且均延迟极低,因而适用于语音通信、联网音频甚至高性能音频处理应用。较之 ARM 等通用处理器,此设计还通过在 DSP 上实现 Opus 编解码器来提升性能。根据通用处理器上所运行代码的优化级别,通过在 C66x TI DSP 核心上实现 Opus 编解码器即可提供 3 倍于 ARM CORTEX A-15 方案的性能。
设计指南: PDF
原理图: PDF
封装 引脚 CAD 符号、封装和 3D 模型
VQFN-HR (RSJ) 32 Ultra Librarian

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

支持和培训

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