主页 电源管理 直流/直流开关稳压器 升压稳压器 升压转换器(集成开关)

TL1454A

正在供货

双通道脉宽调制 (PWM) 控制电路

可提供此产品的更新版本

open-in-new 比较替代产品
功能与比较器件相似
LM5155 正在供货 2.2MHz 宽输入电压、1.5A MOSFET 驱动器、非同步升压控制器 Up to 2.2MHz fSW, higher efficiency and up to 45V input operating voltage

产品详情

Topology Boost, Buck, Flyback, Forward, SEPIC Vin (min) (V) 3.6 Vin (max) (V) 20 Vout (min) (V) 1.26 Vout (max) (V) 20 Type Controller Regulated outputs (#) 2 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2000 Iq (typ) (mA) 3.5 Duty cycle (max) (%) 100 Operating temperature range (°C) -20 to 85 Rating Catalog
Topology Boost, Buck, Flyback, Forward, SEPIC Vin (min) (V) 3.6 Vin (max) (V) 20 Vout (min) (V) 1.26 Vout (max) (V) 20 Type Controller Regulated outputs (#) 2 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 2000 Iq (typ) (mA) 3.5 Duty cycle (max) (%) 100 Operating temperature range (°C) -20 to 85 Rating Catalog
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (D) 16 59.4 mm² 9.9 x 6 SOP (NS) 16 79.56 mm² 10.2 x 7.8 SSOP (DB) 16 48.36 mm² 6.2 x 7.8 TSSOP (PW) 16 32 mm² 5 x 6.4
  • Two Complete PWM Control Circuits
  • Outputs Drive MOSFETs Directly
  • Oscillator Frequency . . . 50 kHz to 2 MHz
  • 3.6-V to 20-V Supply-Voltage Range
  • Low Supply Current . . . 3.5 mA Typ
  • Adjustable Dead-Time Control, 0% to 100%
  • 1.26-V Reference

  • Two Complete PWM Control Circuits
  • Outputs Drive MOSFETs Directly
  • Oscillator Frequency . . . 50 kHz to 2 MHz
  • 3.6-V to 20-V Supply-Voltage Range
  • Low Supply Current . . . 3.5 mA Typ
  • Adjustable Dead-Time Control, 0% to 100%
  • 1.26-V Reference

The TL1454A is a dual-channel pulse-width-modulation (PWM) control circuit, primarily intended for low-power, dc/dc converters. Applications include LCD displays, backlight inverters, notebook computers, and other products requiring small, high-frequency, dc/dc converters.

Each PWM channel has its own error amplifier, PWM comparator, dead-time control comparator, and MOSFET driver. The voltage reference, oscillator, undervoltage lockout, and short-circuit protection are common to both channels.

Channel 1 is configured to drive n-channel MOSFETs in step-up or flyback converters, and channel 2 is configured to drive p-channel MOSFETs in step-down or inverting converters. The operating frequency is set with an external resistor and an external capacitor, and dead time is continuously adjustable from 0 to 100% duty cycle with a resistive divider network. Soft start can be implemented by adding a capacitor to the dead-time control (DTC) network. The error-amplifier common-mode input range includes ground, which allows the TL1454A to be used in ground-sensing battery chargers as well as voltage converters.

The TL1454A is a dual-channel pulse-width-modulation (PWM) control circuit, primarily intended for low-power, dc/dc converters. Applications include LCD displays, backlight inverters, notebook computers, and other products requiring small, high-frequency, dc/dc converters.

Each PWM channel has its own error amplifier, PWM comparator, dead-time control comparator, and MOSFET driver. The voltage reference, oscillator, undervoltage lockout, and short-circuit protection are common to both channels.

Channel 1 is configured to drive n-channel MOSFETs in step-up or flyback converters, and channel 2 is configured to drive p-channel MOSFETs in step-down or inverting converters. The operating frequency is set with an external resistor and an external capacitor, and dead time is continuously adjustable from 0 to 100% duty cycle with a resistive divider network. Soft start can be implemented by adding a capacitor to the dead-time control (DTC) network. The error-amplifier common-mode input range includes ground, which allows the TL1454A to be used in ground-sensing battery chargers as well as voltage converters.

下载 观看带字幕的视频 视频

技术文档

star =有关此产品的 TI 精选热门文档
未找到结果。请清除搜索并重试。
查看全部 5
类型 标题 下载最新的英语版本 日期
* 数据表 Dual-Channel Pulse-Width-Modulation (PWM) Control Circuit 数据表 (Rev. A) 2002年 9月 25日
应用手册 Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019年 3月 12日
应用手册 了解开关模式电源中的升压功率级 1999年 3月 4日
应用手册 了解开关模式电源中的降压功率级 1999年 3月 4日
用户指南 Designing with the TL1454 PWM Controller User's Guide 1998年 12月 8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)。

设计工具

CIRCUIT060010 — PWM 发生器电路

该电路利用一个三角波发生器和比较器生成一个 500kHz 的脉宽调制 (PWM) 波形,其占空比与输入电压成反比。运算放大器和比较器可生成一个三角波形,该波形施加到第二比较器的反相输入端。输入电压施加到第二比较器的同相输入端。通过将输入波形与三角波进行比较,可生成 PWM 波形。第二比较器放置在误差放大器的反馈环路中,用于提高输出波形的精度和线性度。
用户指南: PDF
英语版: PDF
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
封装 引脚 下载
PDIP (N) 16 查看选项
SOIC (D) 16 查看选项
SOP (NS) 16 查看选项
SSOP (DB) 16 查看选项
TSSOP (PW) 16 查看选项

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

视频