TL1451A集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

TL1451A属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由德州仪器制造生产的TL1451ADC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。

FEATURES

· Controlled Baseline

– One Assembly/Test Site, One Fabrication

Site

· Enhanced Diminishing Manufacturing

Sources (DMS) Support

· Enhanced Product-Change Notification

· Qualification Pedigree (1)

· Complete Pulse-Width Modulation (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

DESCRIPTION/ORDERING INFORMATION

The TL1451A-EP 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-EP

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 TL1451A-EP is characterized for operation from –55°C to 125°C.