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

TL3845

활성

8.4V/7.6V UVLO 50% 듀티 사이클, 0~70C를 지원하는 경제적인 단일 종단 500KHz 전류 모드 PWM 컨트롤러

지금 주문
데이터시트

이 제품의 최신 버전이 있습니다

open-in-new 대안 비교
비교 대상 장치보다 업그레이드된 기능을 지원하는 즉각적 대체품
TL3845B 활성 8.4V/7.6V UVLO, 50% 듀티 사이클, 0C~70C를 지원하는 30V, 0.2A 고성능 500KHz 전류 모드 PWM Pin-to-pin equivalent with reduced start-up current

TL3845

활성
데이터시트 지금 주문

제품 상세 정보

Operating temperature range (°C) 0 to 70 Control mode Current Topology Boost, Flyback Rating Catalog Duty cycle (max) (%) 50
Operating temperature range (°C) 0 to 70 Control mode Current Topology Boost, Flyback Rating Catalog Duty cycle (max) (%) 50
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6 SOIC (D) 14 51.9 mm² 8.65 x 6
  • Optimized for Off-Line and DC-to-DC Converters
  • Low Start-Up Current (< 1 mA)
  • Automatic Feed-forward compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load-Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double-Pulse Suppression
  • High-Current Totem-Pole Output
  • Internally Trimmed Bandgap Reference
  • 500-kHz Operation
  • Error Amplifier With Low Output Resistance
  • Designed to be Interchangeable with UC2842 and
    UC3842 Series
  • Optimized for Off-Line and DC-to-DC Converters
  • Low Start-Up Current (< 1 mA)
  • Automatic Feed-forward compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load-Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double-Pulse Suppression
  • High-Current Totem-Pole Output
  • Internally Trimmed Bandgap Reference
  • 500-kHz Operation
  • Error Amplifier With Low Output Resistance
  • Designed to be Interchangeable with UC2842 and
    UC3842 Series

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.
open-in-new 기타 AC/DC & DC/DC controllers (external FET) 찾기
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관심 가지실만한 유사 제품

open-in-new 대안 비교
비교 대상 장치와 유사한 기능
TL2845B 활성 8.4V/7.6V UVLO, 50% 듀티 사이클, -40C~85C를 지원하는 30V, 0.2A 고성능 500KHz 전류 모드 PWM Wider temperature range

기술 문서

star =TI에서 선정한 이 제품의 인기 문서
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모두 보기17
유형 직함 날짜
* Data sheet TLx84x Current-Mode PWM Controllers datasheet (Rev. I) PDF | HTML 2016/07/06
Application note Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (Rev. A) PDF | HTML 2021/06/11
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019/03/12
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 2002/02/07
Application note DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 1999/09/05
Application note DN-27 UC1842/UC1842A Family - Summary of Functional Differences 1999/09/05
Application note DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 1999/09/05
Application note DN-30 Programmable Electronic Circuit Breaker 1999/09/05
Application note DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 1999/09/05
Application note DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 1999/09/05
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 1999/09/05
Application note DN-65 Considerations in Powering BiCMOS ICs 1999/09/05
Application note DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 1999/09/05
Application note U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 1999/09/05
Application note U-111, Practical Considerations in Current Mode Power Supplies 1999/09/05
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

설계 및 개발

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패키지 핀 다운로드
PDIP (P) 8 옵션 보기
SOIC (D) 8 옵션 보기
SOIC (D) 14 옵션 보기
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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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