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

UC1844-SP

활성

우주 등급 QMLV, 30V 입력, 1A 단일 출력 500kHz PWM 컨트롤러, 50% 듀티 사이클

지금 주문
데이터시트

UC1844-SP

활성
데이터시트 지금 주문

제품 상세 정보

Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating Space Duty cycle (max) (%) 50
Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating Space Duty cycle (max) (%) 50
LCCC (FK) 20 79.0321 mm² 8.89 x 8.89
  • Optimized for off-line and DC-to-DC converters
  • Low start-up current (< 1 mA)
  • Automatic feedforward 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
  • Up to 500-kHz operation
  • Error amplifier with low output resistance
  • Optimized for off-line and DC-to-DC converters
  • Low start-up current (< 1 mA)
  • Automatic feedforward 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
  • Up to 500-kHz operation
  • Error amplifier with low output resistance

The UCx84x 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. The internally implemented circuits include 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 that is 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 UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.

The UCx84x 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. The internally implemented circuits include 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 that is 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 UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.
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
TPS7H5001-SP 활성 방사능 저항 동기 정류를 지원하는 QMLV 및 QMLP 2MHz, 듀얼 출력 PWM 컨트롤러 More feature rich QML-qualified radiation-hardened PWM controller family
TPS7H5005-SEP 활성 동기 정류를 지원하는 방사능 내성, 2MHz, 듀얼 출력 PWM 컨트롤러 More feature rich radiation-tolerant PWM controller family for LEO or shorter duration missions

기술 문서

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모두 보기23
유형 직함 날짜
* Data sheet UCx84x Current-Mode PWM Controllers datasheet (Rev. G) PDF | HTML 2022/07/11
* SMD UC1844-SP SMD 5962-86704 2016/07/08
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. A) 2023/08/31
Application note QML flow, its importance, and obtaining lot information (Rev. C) 2023/08/30
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. A) PDF | HTML 2022/11/17
Application note Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 2022/10/19
Selection guide TI Space Products (Rev. I) 2022/03/03
Application brief Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML 2020/12/14
Application note DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 2020/08/21
Application note Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form PDF | HTML 2020/05/18
E-book Radiation Handbook for Electronics (Rev. A) 2019/05/21
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-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 Modeling, Analysis and Compensation of the Current-Mode Converter 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

설계 및 개발

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패키지 핀 다운로드
LCCC (FK) 20 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

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