产品详细信息

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PDIP (N) 16 181 mm² 19.3 x 9.4 SOIC (D) 16 59 mm² 9.9 x 6 SOP (NS) 16 80 mm² 10.2 x 7.8 SSOP (DB) 16 48 mm² 6.2 x 7.8 TSSOP (PW) 16 22 mm² 2.9 x 1.6 TSSOP (PW) 16 22 mm² 4.4 x 5
  • 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.

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类型 标题 下载最新的英文版本 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 Buck-Boost (Inverting) 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

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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。
封装 引脚 下载
PDIP (N) 16 了解详情
SO (NS) 16 了解详情
SOIC (D) 16 了解详情
SSOP (DB) 16 了解详情
TSSOP (PW) 16 了解详情

订购与质量

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  • 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/FIT 估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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