产品详细信息

Topology Flyback, Boost, Duty cycle (Max) (%) 100 Supply voltage (Max) (V) 18 UVLO thresholds on/off (V) 8.4/7.6 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology, Programmable Max Duty Cycle Operating temperature range (C) -40 to 105 Rating Catalog Frequency (Max) (kHz) 1000 Gate drive (Typ) (A) 1
Topology Flyback, Boost, Duty cycle (Max) (%) 100 Supply voltage (Max) (V) 18 UVLO thresholds on/off (V) 8.4/7.6 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology, Programmable Max Duty Cycle Operating temperature range (C) -40 to 105 Rating Catalog Frequency (Max) (kHz) 1000 Gate drive (Typ) (A) 1
PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 VSSOP (DGK) 8 15 mm² 3 x 4.9
  • Enhanced Replacement for UCx84x and UCx84xA Family With Pin-to-Pin Compatibility
  • 1-MHz Operation
  • 50-µA Standby Current, 100-µA Maximum
  • Low Operating Current of 2.3 mA at 52 kHz
  • Fast 35-ns Cycle-by-Cycle Over-Current Limiting
  • ±1-A Peak Output Current
  • Rail-to-Rail Output Swings with 25-ns Rise and 20-ns Fall Times
  • ±1% Initial Trimmed 2.5-V Error Amplifier Reference
  • Trimmed Oscillator Discharge Current
  • New Undervoltage Lockout Versions
  • VSSOP-8 Package Minimizes Board Space
  • Enhanced Replacement for UCx84x and UCx84xA Family With Pin-to-Pin Compatibility
  • 1-MHz Operation
  • 50-µA Standby Current, 100-µA Maximum
  • Low Operating Current of 2.3 mA at 52 kHz
  • Fast 35-ns Cycle-by-Cycle Over-Current Limiting
  • ±1-A Peak Output Current
  • Rail-to-Rail Output Swings with 25-ns Rise and 20-ns Fall Times
  • ±1% Initial Trimmed 2.5-V Error Amplifier Reference
  • Trimmed Oscillator Discharge Current
  • New Undervoltage Lockout Versions
  • VSSOP-8 Package Minimizes Board Space

UCCx8C4x family are high-performance, current-mode PWM controllers. The UCCx8C4x is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UCx84xA family and UCx84x family of PWM controllers. The BiCMOS technology offers lower power consumption to improve efficiency as well as faster current sense and oscillator frequency. In addition, lower startup voltage versions of 7 V are offered as UCCx8C40 and UCCx8C41 for use in battery systems. The UCC28C4x series is specified for operation from –40°C to 105°C, and the UCC38C4x series is specified for operation from 0°C to 70°C.

Providing necessary features to control fixed frequency, peak current-mode power supplies, this family offers the following performance advantages. The device offers high-frequency operation up to 1 MHz, suitable for high speed applications. The trimmed discharge current enables more precise programming of the maximum duty cycle and dead-time limit when compared to the UCx84x family. Reduced start-up and operating currents minimizes start-up loss and low operating power consumption for improved efficiency. The device also features a fast current-sense-to-output delay time of 35 ns for superior overload protection at the power switch, and a ±1-A peak output current capability with improved rise and fall times for driving large external MOSFETs directly.

The UCC38C4x family is offered in 8-pin VSSOP (DGK), 8-pin SOIC (D), and 8-pin PDIP (P) packages.

UCCx8C4x family are high-performance, current-mode PWM controllers. The UCCx8C4x is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UCx84xA family and UCx84x family of PWM controllers. The BiCMOS technology offers lower power consumption to improve efficiency as well as faster current sense and oscillator frequency. In addition, lower startup voltage versions of 7 V are offered as UCCx8C40 and UCCx8C41 for use in battery systems. The UCC28C4x series is specified for operation from –40°C to 105°C, and the UCC38C4x series is specified for operation from 0°C to 70°C.

Providing necessary features to control fixed frequency, peak current-mode power supplies, this family offers the following performance advantages. The device offers high-frequency operation up to 1 MHz, suitable for high speed applications. The trimmed discharge current enables more precise programming of the maximum duty cycle and dead-time limit when compared to the UCx84x family. Reduced start-up and operating currents minimizes start-up loss and low operating power consumption for improved efficiency. The device also features a fast current-sense-to-output delay time of 35 ns for superior overload protection at the power switch, and a ±1-A peak output current capability with improved rise and fall times for driving large external MOSFETs directly.

The UCC38C4x family is offered in 8-pin VSSOP (DGK), 8-pin SOIC (D), and 8-pin PDIP (P) packages.

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类型 标题 下载最新的英文版本 日期
* 数据表 UCCx8C4x BiCMOS Low-Power Current-Mode PWM Controller 数据表 (Rev. G) 2017年 1月 10日
应用手册 使用 TI 运算放大器调节开关模式电源电流信号 (Rev. A) 下载英文版本 (Rev.A) 2021年 7月 16日
应用手册 Understanding Buck-Boost (Inverting) Power Stages in Switch Mode Power Supplies (Rev. B) 2019年 3月 12日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
应用手册 UCC38C44 12-V Isolated Bias Supply (Rev. A) 2008年 10月 9日
用户指南 UCC38C42 30-W Synchronous Buck Converter Reference Design 2003年 2月 4日
应用手册 UCC38C42 25-W Forward Converter 2002年 9月 6日
应用手册 UCC38C42 系列高速 BiCMOS 电流模式 PWM 控制器 2002年 2月 7日
应用手册 DN-30 Programmable Electronic Circuit Breaker 1999年 9月 5日
应用手册 DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 1999年 9月 5日
应用手册 U-111, Practical Considerations in Current Mode Power Supplies 1999年 9月 5日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

仿真模型

UCC28C43 PSpice Transient Model

SLUM033.ZIP (101 KB) - PSpice Model
仿真模型

UCC28C43 TINA-TI Start-Up Reference Design

SLUM176.TSC (204 KB) - TINA-TI Reference Design
仿真模型

UCC28C43 TINA-TI Steady-State Reference Design

SLUM177.TSC (182 KB) - TINA-TI Reference Design
仿真模型

UCC28C43 TINA-TI Start-Up Spice Model

SLUM178.ZIP (10 KB) - TINA-TI Spice Model
仿真模型

UCC28C43 TINA-TI Steady-State Spice Model

SLUM179.ZIP (10 KB) - TINA-TI Spice Model
仿真模型

UCCx8C43 Unencrypted PSpice Transient Model

SLUM521.ZIP (4 KB) - PSpice Model
封装 引脚 下载
PDIP (P) 8 了解详情
SOIC (D) 8 了解详情
VSSOP (DGK) 8 了解详情

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包含信息:
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  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/FIT 估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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