Startseite Energiemanagement AC/DC- und DC/DC-Controller (externer FET)

LM5185-Q1

AKTIV

Flyback-Controller mit primärseitiger Regelung für die Automobilindustrie, 100 VIN, mit niedrigem IQ

Produktdetails

Vin (min) (V) 4.5 Vin (max) (V) 100 Operating temperature range (°C) -40 to 125 Control mode Peak current mode Topology PSR flyback Rating Automotive Features Hiccup mode protection, Quasi-Resonant, Soft Start Adjustable, Soft Start Fixed, adjustable UVLO TI functional safety category Functional Safety-Capable
Vin (min) (V) 4.5 Vin (max) (V) 100 Operating temperature range (°C) -40 to 125 Control mode Peak current mode Topology PSR flyback Rating Automotive Features Hiccup mode protection, Quasi-Resonant, Soft Start Adjustable, Soft Start Fixed, adjustable UVLO TI functional safety category Functional Safety-Capable
HTSSOP (PWP) 14 32 mm² 5 x 6.4
  • AEC-Q100-qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient temperature range
  • Functional Safety-Capable
  • 4.5-V to 100-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 25 EMI requirement
  • Create a custom design using LM5185-Q1 with WEBENCH Power Designer
  • AEC-Q100-qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient temperature range
  • Functional Safety-Capable
  • 4.5-V to 100-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 25 EMI requirement
  • Create a custom design using LM5185-Q1 with WEBENCH Power Designer

The LM5185-Q1 is a primary-side regulated (PSR) flyback controller with high efficiency over a wide input voltage range of 4.5 V to 100 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 100-V input with enhanced headroom for line transients.

The LM5185-Q1 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 LM5185-Q1 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 LM5185-Q1 controller is qualified to automotive AEC-Q100 grade 1 and is available in a 14-pin, 5-mm × 4.4-mm, thermally-enhanced HTSSOP package with 0.65-mm pin pitch.

The LM5185-Q1 is a primary-side regulated (PSR) flyback controller with high efficiency over a wide input voltage range of 4.5 V to 100 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 100-V input with enhanced headroom for line transients.

The LM5185-Q1 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 LM5185-Q1 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 LM5185-Q1 controller is qualified to automotive AEC-Q100 grade 1 and 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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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM5185-Q1100-VINPSR FlybackAutomotiveDC/DC Controller With Low IQand Low EMI datasheet (Rev. A) PDF | HTML 10 Nov 2023
EVM User's guide LM5185-Q1, LM5185EVM-SIO Single-Output Evaluation Module User's Guide PDF | HTML 02 Jul 2023
Functional safety information LMx5185-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 24 Mai 2023

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

LM5185EVM-SIO — LM5185–Q1 Evaluierungsmodul mit einem isolierten Ausgang

Das LM5185EVM-SIO-Evaluierungsmodul (EVM) demonstriert die Funktionen und die Leistung des primärseitig geregelten (PSR) LM5185-Q1-Flyback-Controllers. Er misst die Spannung der Primärwicklung des Transformators, um eine enge Ausgangsregelung ohne Verwendung des Optokopplers oder der tertiären (...)
Benutzerhandbuch: PDF | HTML
Simulationsmodell

LM5185 and LM5185-Q1 PSpice Transient Model (Rev. A)

SNVMCC7A.ZIP (107 KB) - PSpice Model
Berechnungstool

LM5185-DESIGN-CALC LM5185 PSR Flyback Controller Quickstart Design Calculator

LM5185 PSR Flyback Controller Quickstart Design Calculator
Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
AC/DC- und DC/DC-Controller (externer FET)
LM5185 Flyback-Controller mit primärseitiger Regelung für die Automobilindustrie, 100 VIN, mit niedrigem IQ LM5185-Q1 Flyback-Controller mit primärseitiger Regelung für die Automobilindustrie, 100 VIN, mit niedrigem IQ
Hardware-Entwicklung
Evaluierungsplatine
LM5185EVM-SIO LM5185–Q1 Evaluierungsmodul mit einem isolierten Ausgang
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
HTSSOP (PWP) 14 Ultra Librarian

Bestellen & Qualität

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  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
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  • Werksstandort
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