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PWM 控制器

UC2843A

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具有 8.4V/7.6V UVLO 100% 占空比、温度范围为 40°C 至 85°C 的 30V、1A、500KHz 电流模式 PWM 控制器

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数据表

UC2843A

正在供货
数据表 立即订购

产品详细信息

Topology Boost, Buck, Buck-Boost, Flyback, Forward Duty cycle (Max) (%) 100 Supply voltage (Max) (V) 28 UVLO thresholds on/off (V) 8.4/7.6 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology Operating temperature range (C) -40 to 85 Rating Catalog Frequency (Max) (kHz) 500 Gate drive (Typ) (A) 1
Topology Boost, Buck, Buck-Boost, Flyback, Forward Duty cycle (Max) (%) 100 Supply voltage (Max) (V) 28 UVLO thresholds on/off (V) 8.4/7.6 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology Operating temperature range (C) -40 to 85 Rating Catalog Frequency (Max) (kHz) 500 Gate drive (Typ) (A) 1
PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 14 52 mm² 8.65 x 6 SOIC (D) 8 19 mm² 3.91 x 4.9
  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500-kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer
  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500-kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
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类型 项目标题 下载最新的英语版本 日期
* 数据表 UCx84xA Current-Mode PWM Controller 数据表 (Rev. G) PDF | HTML 12 Jul 2022
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) PDF | HTML 下载英文版本 (Rev.A) PDF | HTML 16 Jul 2021
应用手册 Understanding Buck-Boost (Inverting) Power Stages in Switch Mode Power Supplies (Rev. B) 12 Mar 2019
应用手册 UCC38C42 系列高速 BiCMOS 电流模式 PWM 控制器 07 Feb 2002
应用手册 DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 05 Sep 1999
应用手册 DN-27 UC1842/UC1842A Family - Summary of Functional Differences 05 Sep 1999
应用手册 DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 05 Sep 1999
应用手册 DN-30 Programmable Electronic Circuit Breaker 05 Sep 1999
应用手册 DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 05 Sep 1999
应用手册 DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 05 Sep 1999
应用手册 U-111, Practical Considerations in Current Mode Power Supplies 05 Sep 1999

设计和开发

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仿真模型

UCC28C43 PSpice Transient Model UCC28C43 PSpice Transient Model

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仿真模型

UCCx8C43 Unencrypted PSpice Transient Model UCCx8C43 Unencrypted PSpice Transient Model

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封装 引脚数 下载
PDIP (P) 8 了解详情
SOIC (D) 14 了解详情
SOIC (D) 8 了解详情

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
  • 认证摘要
  • 持续可靠性监测

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