홈 전력 관리 AC/DC switching regulators AC/DC controllers
홈
전력 관리
AC/DC switching regulators
AC/DC controllers

LM25185

활성

낮은 IQ 및 낮은 EMI를 지원하는 42VIN 1차측 조정 플라이백 컨트롤러

지금 주문
데이터 시트

LM25185

활성
데이터 시트 지금 주문

제품 상세 정보

Topology PSR flyback Control mode Peak current mode Features Hiccup mode protection, Quasi-Resonant, Soft Start Adjustable, Soft Start Fixed, adjustable UVLO
Topology PSR flyback Control mode Peak current mode Features Hiccup mode protection, Quasi-Resonant, Soft Start Adjustable, Soft Start Fixed, adjustable UVLO
HTSSOP (PWP) 14 32 mm² 5 x 6.4
  • Functional Safety-Capable
  • 4.5-V to 42-V wide input voltage range
  • Extended power range from less than 1 W to more than 50 W
  • Robust PSR flyback design for reliable and rugged applications
    • Robust design with only a transformer crossing the isolation barrier
    • ±1.5% total output regulation accuracy
    • Optional VOUT temperature compensation
    • Input UVLO and thermal shutdown protection
    • Hiccup-mode overcurrent fault protection
    • 0.9-mm HV-LV pin spacing in 14-pin HTSSOP package
    • –40°C to +150°C junction temperature range
  • Integration reduces design size and cost
    • No optocoupler or transformer auxiliary winding required for V OUT regulation
    • 2-A peak sink and 1-A peak source high-current power MOSFET gate driver
  • High efficiency with best-in-class active I Q
    • Quasi-resonant switching in boundary conduction mode (BCM) at heavy load
    • External VCC option for improved efficiency
    • High light-load efficiency with lowest I Q (25-µA typical with external VCC)
    • Single and multiple output implementations
  • Ultra-low conducted and radiated EMI signatures
    • Soft switching avoids diode reverse recovery
    • Designed for CISPR 32 EMI requirement
  • Create a custom design using LM25185 with WEBENCH Power Designer
  • Functional Safety-Capable
  • 4.5-V to 42-V wide input voltage range
  • Extended power range from less than 1 W to more than 50 W
  • Robust PSR flyback design for reliable and rugged applications
    • Robust design with only a transformer crossing the isolation barrier
    • ±1.5% total output regulation accuracy
    • Optional VOUT temperature compensation
    • Input UVLO and thermal shutdown protection
    • Hiccup-mode overcurrent fault protection
    • 0.9-mm HV-LV pin spacing in 14-pin HTSSOP package
    • –40°C to +150°C junction temperature range
  • Integration reduces design size and cost
    • No optocoupler or transformer auxiliary winding required for V OUT regulation
    • 2-A peak sink and 1-A peak source high-current power MOSFET gate driver
  • High efficiency with best-in-class active I Q
    • Quasi-resonant switching in boundary conduction mode (BCM) at heavy load
    • External VCC option for improved efficiency
    • High light-load efficiency with lowest I Q (25-µA typical with external VCC)
    • Single and multiple output implementations
  • Ultra-low conducted and radiated EMI signatures
    • Soft switching avoids diode reverse recovery
    • Designed for CISPR 32 EMI requirement
  • Create a custom design using LM25185 with WEBENCH Power Designer

The LM25185 is a primary-side regulated (PSR) flyback controller with high efficiency over a wide input voltage range of 4.5 V to 42 V. The isolated output voltage is sampled from the primary-side flyback voltage, eliminating the need for an optocoupler, voltage reference, or third winding from the transformer for output voltage regulation.

The high level of integration results in a simple, reliable, and high-density design with only a transformer crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetic design and better than ±1.5% load and line regulation performance. BCM supports applications of up to 42-V input with enhanced headroom for line transients.

The LM25185 flyback controller simplifies implementation of isolated DC/DC supplies with optional features to optimize performance for the target end equipment. The output voltage is set by one resistor, while an optional resistor improves output voltage accuracy by negating the thermal coefficient of the flyback diode voltage drop. The LM25185 controller, with the integrated high-current MOSFET gate driver, extends the power range from less than 1 W to more than 50 W, making the device a scalable and easy-to-migrate design over a wide power range. The tunable compensation using the COMP pin and the adjustable peak current limit with the current-sensing resistor make the design flexible and an excellent choice towards different application requirements.

Additional features include an internally-fixed or externally-programmable soft start, optional external VCC for higher efficiency, precision enable input with hysteresis for adjustable line UVLO, peak current-mode control with shunt current sensing, hiccup-mode overload protection, a high-current MOSFET gate driver, and thermal shutdown protection with automatic recovery. A connection to the high-voltage MOSFET drain is not required, thus increasing safety and simplifying PCB clearance distance requirements.

The LM25185 flyback controller is available in a 14-pin, 5-mm × 4.4-mm, thermally-enhanced HTSSOP package with 0.65-mm pin pitch.

The LM25185 is a primary-side regulated (PSR) flyback controller with high efficiency over a wide input voltage range of 4.5 V to 42 V. The isolated output voltage is sampled from the primary-side flyback voltage, eliminating the need for an optocoupler, voltage reference, or third winding from the transformer for output voltage regulation.

The high level of integration results in a simple, reliable, and high-density design with only a transformer crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetic design and better than ±1.5% load and line regulation performance. BCM supports applications of up to 42-V input with enhanced headroom for line transients.

The LM25185 flyback controller simplifies implementation of isolated DC/DC supplies with optional features to optimize performance for the target end equipment. The output voltage is set by one resistor, while an optional resistor improves output voltage accuracy by negating the thermal coefficient of the flyback diode voltage drop. The LM25185 controller, with the integrated high-current MOSFET gate driver, extends the power range from less than 1 W to more than 50 W, making the device a scalable and easy-to-migrate design over a wide power range. The tunable compensation using the COMP pin and the adjustable peak current limit with the current-sensing resistor make the design flexible and an excellent choice towards different application requirements.

Additional features include an internally-fixed or externally-programmable soft start, optional external VCC for higher efficiency, precision enable input with hysteresis for adjustable line UVLO, peak current-mode control with shunt current sensing, hiccup-mode overload protection, a high-current MOSFET gate driver, and thermal shutdown protection with automatic recovery. A connection to the high-voltage MOSFET drain is not required, thus increasing safety and simplifying PCB clearance distance requirements.

The LM25185 flyback controller is available in a 14-pin, 5-mm × 4.4-mm, thermally-enhanced HTSSOP package with 0.65-mm pin pitch.
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기술 자료

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2개 모두 보기
유형 직함 날짜
* Data sheet LM2518542-VINPSR Flyback DC/DC Controller With Low IQand Low EMI datasheet PDF | HTML 2023/11/10
Functional safety information LMx5185 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 2023/05/24

설계 및 개발

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

평가 보드

LM5185EVM-SIO — LM5185-Q1 단일 절연 출력 평가 모듈

LM5185EVM-SIO 평가 모듈(EVM)은 LM5185-Q1, 1차측 조정(PSR) 플라이백 컨트롤러의 기능과 성능을 입증합니다. 이 설계는 변압기의 1차 권선의 전압을 샘플링하여 옵토커플러나 3차 바이어스 권선을 사용하지 않고 엄격한 출력 조정을 구현합니다. 입력 전압 범위는 20V~60V이며 정격 부하는 1A이고 출력은 16.4V입니다.
사용 설명서: PDF | HTML
TI.com에서 구매 불가
시뮬레이션 모델

LM25185 and LM25185-Q1 PSpice Transient Model (Rev. A)

SNVMCD1A.ZIP (162 KB) - PSpice Model
다운로드
계산 툴

LM25185-DESIGN-CALC — LM25185 PSR flyback controller quick start design calculator

LM25185 PSR flyback controller quick start design calculator
지원되는 제품 및 하드웨어

지원되는 제품 및 하드웨어

제품
AC/DC controllers
  • LM25185 — 낮은 IQ 및 낮은 EMI를 지원하는 42VIN 1차측 조정 플라이백 컨트롤러
  • LM25185-Q1 — 낮은 IQ 및 낮은 EMI를 지원하는 오토모티브 42VIN 1차측 조정 플라이백 컨트롤러
다운로드
패키지 핀 CAD 기호, 풋프린트 및 3D 모델
HTSSOP (PWP) 14 Ultra Librarian
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

권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.

지원 및 교육

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