전원 관리 AC/DC 및 DC/DC 컨트롤러(외장 FET)

UC3856

활성

40V, 1.5A 전류 모드 1MHz PWM 컨트롤러, 0C~70C

제품 상세 정보

Vin (max) (V) 40 Operating temperature range (°C) 0 to 70 Control mode Current Topology Boost, Buck, Flyback, Forward, Full bridge, Half bridge, Push pull Rating Catalog Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
Vin (max) (V) 40 Operating temperature range (°C) 0 to 70 Control mode Current Topology Boost, Buck, Flyback, Forward, Full bridge, Half bridge, Push pull Rating Catalog Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • Pin-for-Pin Compatible With the UC3846
  • 65ns Typical Delay From Shutdown to Outputs, and 50ns Typical Delay From Sync to Outputs
  • Improved Current Sense Amplifier With Reduced Noise Sensitivity
  • Differential Current Sense with 3V Common Mode Range
  • Trimmed Oscillator Discharge Current for Accurate Deadband Control
  • Accurate 1V Shutdown Threshold
  • High Current Dual Totem Pole Outputs (1.5A peak)
  • TTL Compatible Oscillator SYNC Pin Thresholds
  • 4kV ESD Protection
  • Pin-for-Pin Compatible With the UC3846
  • 65ns Typical Delay From Shutdown to Outputs, and 50ns Typical Delay From Sync to Outputs
  • Improved Current Sense Amplifier With Reduced Noise Sensitivity
  • Differential Current Sense with 3V Common Mode Range
  • Trimmed Oscillator Discharge Current for Accurate Deadband Control
  • Accurate 1V Shutdown Threshold
  • High Current Dual Totem Pole Outputs (1.5A peak)
  • TTL Compatible Oscillator SYNC Pin Thresholds
  • 4kV ESD Protection

The UC3856 is a high performance version of the popular UC3846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a tri-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal \x93noise\x94 caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier results in enhanced noise immunity.

Other features include a trimmed oscillator current (8%) for accurate frequency and dead time control; a 1V, 5% shutdown threshold; and 4kV minimum ESD protection on all pins.

The UC3856 is a high performance version of the popular UC3846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a tri-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal \x93noise\x94 caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier results in enhanced noise immunity.

Other features include a trimmed oscillator current (8%) for accurate frequency and dead time control; a 1V, 5% shutdown threshold; and 4kV minimum ESD protection on all pins.

다운로드 스크립트와 함께 비디오 보기 동영상

관심 가지실만한 유사 제품

open-in-new 대안 비교
비교 대상 장치와 유사한 기능
TL494 활성 40V, 0.2A 300KHz PWM 컨트롤러 Supports push-pull topology

기술 자료

star =TI에서 선정한 이 제품의 인기 문서
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4개 모두 보기
유형 직함 날짜
* Data sheet Improved Current Mode PWM Controller datasheet (Rev. A) 2010/10/07
Selection guide Power Management Guide 2018 (Rev. R) 2018/06/25
Application note DN-45 UC3846, UC3856 and UCC3806 Push Pull PWM Current Mode Control ICs 1999/09/05
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 1999/09/05

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

패키지 CAD 기호, 풋프린트 및 3D 모델
PDIP (N) 16 Ultra Librarian
SOIC (DW) 16 Ultra Librarian

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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