전원 관리 AC/DC 및 DC/DC 컨트롤러(외장 FET)

UC3902

활성

20V 부하 공유 컨트롤러, 0°C~70°C

제품 상세 정보

Vin (max) (V) 20 Operating temperature range (°C) 0 to 70 Control mode Voltage Topology Buck, Flyback Rating Catalog Features Load Sharing, Programmable loop compensation, Remote Sensing, Under Voltage Protection
Vin (max) (V) 20 Operating temperature range (°C) 0 to 70 Control mode Voltage Topology Buck, Flyback Rating Catalog Features Load Sharing, Programmable loop compensation, Remote Sensing, Under Voltage Protection
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6
  • 2.7-V to 20-V Operation
  • 8-Pin Package
  • Requires Minimum Number of External Components
  • Compatible with Existing Power Supply Designs
    Incorporating Remote Output Voltage Sensin
  • Differential Share Bus
  • Precision Current Sense Amplifier (40 Gain)
  • UVLO (Undervoltage Lockout) Circuitry
  • User Programmable Share Loop Compensation
  • APPLICATIONS
    • Paralelled Power Supplies

  • 2.7-V to 20-V Operation
  • 8-Pin Package
  • Requires Minimum Number of External Components
  • Compatible with Existing Power Supply Designs
    Incorporating Remote Output Voltage Sensin
  • Differential Share Bus
  • Precision Current Sense Amplifier (40 Gain)
  • UVLO (Undervoltage Lockout) Circuitry
  • User Programmable Share Loop Compensation
  • APPLICATIONS
    • Paralelled Power Supplies

The UC3902 load share controller is an 8-pin device that balances the current drawn from independent, paralleled power supplies. Load sharing is accomplished by adjusting each supplies’ output current to a level proportional to the voltage on a share bus.

The master power supply, which is automatically designated as the supply that regulates to the highest voltage, drives the share bus with a voltage proportional to its output current. The UC3902 trims the output voltage of the other paralleled supplies so that they each support their share of the load current. Typically, each supply is designed for the same current level although that is not necessary for use with the UC3902. By appropriately scaling the current sense resistor, supplies with different output current capability can be paralleled with each supply providing the same percentage of their output current capability for a particular load.

A differential line is used for the share bus to maximize noise immunity and accommodate different voltage drops in each power converter’s ground return line. Trimming of each converter’s output voltage is accomplished by injecting a small current into the output voltage sense line, which requires a small resistance (typically 20 Ω to 100 Ω) to be inserted.

The UC3902 load share controller is an 8-pin device that balances the current drawn from independent, paralleled power supplies. Load sharing is accomplished by adjusting each supplies’ output current to a level proportional to the voltage on a share bus.

The master power supply, which is automatically designated as the supply that regulates to the highest voltage, drives the share bus with a voltage proportional to its output current. The UC3902 trims the output voltage of the other paralleled supplies so that they each support their share of the load current. Typically, each supply is designed for the same current level although that is not necessary for use with the UC3902. By appropriately scaling the current sense resistor, supplies with different output current capability can be paralleled with each supply providing the same percentage of their output current capability for a particular load.

A differential line is used for the share bus to maximize noise immunity and accommodate different voltage drops in each power converter’s ground return line. Trimming of each converter’s output voltage is accomplished by injecting a small current into the output voltage sense line, which requires a small resistance (typically 20 Ω to 100 Ω) to be inserted.

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관심 가지실만한 유사 제품

open-in-new 대안 비교
비교 대상 장치보다 업그레이드된 기능을 지원하는 드롭인 대체품
UCC29002 활성 고급 8핀 부하 공유 컨트롤러, -40°C~105°C This device has improved power efficiency and feature set.

기술 자료

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3개 모두 보기
유형 직함 날짜
* Data sheet Load Share Controllers datasheet (Rev. E) 2011/07/28
User guide UCC39002 Advanced Load-Share Controller User's Guide, HPA027A (Rev. A) 2004/02/09
Application note U-163 The UC3902 Load Share Controller and its Performance in Distributed Power (Rev. A) 2002/12/13

설계 및 개발

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평가 보드

UCC39002EVM — UCC39002 평가 모듈

The UCC39002 is an advanced, high-performance load-share controller that provides all the necessary functions to parallel multiple independent power supplies or dc-to-dc modules. This load-share circuit is based upon the automatic master/slave architecture utilized in the UC3902 and UC3907 (...)

사용 설명서: PDF
TI.com에서 구매 불가
패키지 CAD 기호, 풋프린트 및 3D 모델
PDIP (P) 8 Ultra Librarian
SOIC (D) 8 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

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