TL1451 - 双脉宽调制控制电路

TL1451是TI德州仪器公司的一款控制器（外部开关）产品，TL1451是双脉宽调制控制电路，本站介绍了TL1451的封装应用图解、特点和优点、功能等，并给出了与TL1451相关的TI元器件型号供参考。

TL1451 - 双脉宽调制控制电路 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The TL1451A incorporates on a single monolithic chip all the functions required in the construction of two pulse-width-modulation (PWM) control circuits. Designed primarily for power-supply control, the TL1451A contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry, and dual common-emitter output transistor circuits.

The uncommitted output transistors provide common-emitter output capability for each controller. The internal amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC) comparator has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip oscillator can be operated by terminating RT and CT. During low VCC conditions, the undervoltage lockout control circuit feature locks the outputs off until the internal circuitry is operational.

The TL1451AC is characterized for operation from -20°C to 85°C. The TL1451AQ is characterized for operation from -40°C to 125°C. The TL1451AM is characterized for operation from -55°C to 125°C.

产品特性

Complete PWM Power Control Circuitry
Completely Synchronized Operation
Internal Undervoltage Lockout Protection
Wide Supply Voltage Range
Internal Short-Circuit Protection
Oscillator Frequency...500 kHz Max
Variable Dead Time Provides Control Over Total Range
Internal Regulator Provides a Stable 2.5-V Reference Supply
Available in Q-Temp Automotive HighRel Automotive Applications Configuration Control / Print Support Qualification to Automotive Standards

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