홈 전원 관리 AC/DC & DC/DC controllers (external FET)
홈
전원 관리
AC/DC & DC/DC controllers (external FET)

TL1454A

활성

듀얼 채널 펄스 폭 변조(PWM) 컨트롤 회로

지금 주문
데이터시트

이 제품의 최신 버전이 있습니다

open-in-new 대안 비교
비교 대상 장치와 유사한 기능
LM5155 활성 2.2MHz 와이드 VIN, 1.5A MOSFET 드라이버, 비동기 부스트 컨트롤러 Up to 2.2MHz fSW, higher efficiency and up to 45V input operating voltage

TL1454A

활성
데이터시트 지금 주문

제품 상세 정보

Vin (min) (V) 3.6 Vin (max) (V) 20 Iout (max) (A) 3 Operating temperature range (°C) -20 to 85 Control mode Voltage mode Topology Boost, Buck, Flyback, Forward, SEPIC Rating Catalog Vout (min) (V) 1.26 Vout (max) (V) 20 Iq (typ) (A) 0.0035 Duty cycle (max) (%) 100
Vin (min) (V) 3.6 Vin (max) (V) 20 Iout (max) (A) 3 Operating temperature range (°C) -20 to 85 Control mode Voltage mode Topology Boost, Buck, Flyback, Forward, SEPIC Rating Catalog Vout (min) (V) 1.26 Vout (max) (V) 20 Iq (typ) (A) 0.0035 Duty cycle (max) (%) 100
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.
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기술 문서

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모두 보기5
유형 직함 날짜
* Data sheet Dual-Channel Pulse-Width-Modulation (PWM) Control Circuit datasheet (Rev. A) 2002/09/25
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019/03/12
Application note Understanding Boost Power Stages In Switchmode Power Supplies 1999/03/04
Application note Understanding Buck Power Stages In Switchmode Power Supplies 1999/03/04
User guide Designing with the TL1454 PWM Controller User's Guide 1998/12/08

설계 및 개발

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설계 툴

CIRCUIT060010 — PWM 제너레이터 회로

This circuit utilizes a triangle wave generator and comparator to generate a 500 kHz pulse-width modulated (PWM) waveform with a duty cycle that is inversely proportional to the input voltage. An op amp and comparator generate a triangle waveform which is applied to the inverting input of a second (...)
사용 설명서: PDF
옵션 보기
패키지 핀 다운로드
PDIP (N) 16 옵션 보기
SOIC (D) 16 옵션 보기
SOP (NS) 16 옵션 보기
SSOP (DB) 16 옵션 보기
TSSOP (PW) 16 옵션 보기
TI의 평가 항목에 대한 표준 약관이 적용됩니다.

주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

지원 및 교육

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포럼 주제 모두 보기(영문)

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