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LM25180-Q1

ACTIVE

Automotive 42-VIN PSR flyback converter with 65-V, 1.5-A integrated power MOSFET

Product details

Device type Converters Topology Flyback Vin (min) (V) 4.5 Vin (max) (V) 42 Iout (max) (A) 1.5 Features Enable, Integrated Switch, Light load efficiency, Pre-bias soft start, UVLO adjustable Operating temperature range (°C) -40 to 150 Regulated outputs (#) 1 TI functional safety category Functional Safety-Capable Control mode Peak current mode Rating Automotive
Device type Converters Topology Flyback Vin (min) (V) 4.5 Vin (max) (V) 42 Iout (max) (A) 1.5 Features Enable, Integrated Switch, Light load efficiency, Pre-bias soft start, UVLO adjustable Operating temperature range (°C) -40 to 150 Regulated outputs (#) 1 TI functional safety category Functional Safety-Capable Control mode Peak current mode Rating Automotive
WSON (NGU) 8 16 mm² 4 x 4
  • AEC-Q100-qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient temperature range
  • Designed for reliable and rugged applications
    • Wide input voltage range of 4.5 V to 42 V
    • Robust solution with only one component crossing the isolation barrier
    • ±1.5% total output regulation accuracy
    • Optional VOUT temperature compensation
    • 6-ms internal or programmable soft start
    • Input UVLO and thermal shutdown protection
    • Hiccup-mode overcurrent fault protection
    • –40°C to +150°C junction temperature range
  • Integration reduces solution size and cost
    • Integrated 65-V, 0.4-Ω power MOSFET
    • No opto-coupler or transformer auxiliary winding required for VOUT regulation
    • Low EMI operation to meet CISPR 25
  • High efficiency PSR flyback operation
    • Quasi-resonant switching in boundary conduction mode (BCM) at heavy load
    • External bias option for improved efficiency
    • Single- and multi-output implementations
  • Create a custom regulator design using WEBENCH® Power Designer
  • AEC-Q100-qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient temperature range
  • Designed for reliable and rugged applications
    • Wide input voltage range of 4.5 V to 42 V
    • Robust solution with only one component crossing the isolation barrier
    • ±1.5% total output regulation accuracy
    • Optional VOUT temperature compensation
    • 6-ms internal or programmable soft start
    • Input UVLO and thermal shutdown protection
    • Hiccup-mode overcurrent fault protection
    • –40°C to +150°C junction temperature range
  • Integration reduces solution size and cost
    • Integrated 65-V, 0.4-Ω power MOSFET
    • No opto-coupler or transformer auxiliary winding required for VOUT regulation
    • Low EMI operation to meet CISPR 25
  • High efficiency PSR flyback operation
    • Quasi-resonant switching in boundary conduction mode (BCM) at heavy load
    • External bias option for improved efficiency
    • Single- and multi-output implementations
  • Create a custom regulator design using WEBENCH® Power Designer

The LM25180-Q1 is a primary-side regulated (PSR) flyback converter 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 one component crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetic solution and better than ±1.5% load and line regulation performance. An integrated 65-V power MOSFET provides output power up to 7 W with enhanced headroom for line transients.

The LM25180-Q1 converter 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. Additional features include an internally-fixed or externally-programmable soft start, optional bias supply connection for higher efficiency, precision enable input with hysteresis for adjustable line UVLO, hiccup-mode overload protection, and thermal shutdown protection with automatic recovery.

The LM25180-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in 8-pin WSON package with 0.8-mm pin pitch and wettable flanks.

The LM25180-Q1 is a primary-side regulated (PSR) flyback converter 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 one component crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetic solution and better than ±1.5% load and line regulation performance. An integrated 65-V power MOSFET provides output power up to 7 W with enhanced headroom for line transients.

The LM25180-Q1 converter 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. Additional features include an internally-fixed or externally-programmable soft start, optional bias supply connection for higher efficiency, precision enable input with hysteresis for adjustable line UVLO, hiccup-mode overload protection, and thermal shutdown protection with automatic recovery.

The LM25180-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in 8-pin WSON package with 0.8-mm pin pitch and wettable flanks.

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Supported products & hardware

Supported products & hardware

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Isolated DC/DC converters & modules
LM25180 42-Vin no-opto flyback converter with 65-V, 1.5-A integrated MOSFET LM25180-Q1 Automotive 42-VIN PSR flyback converter with 65-V, 1.5-A integrated power MOSFET
Hardware development
Evaluation board
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Software
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Supported products & hardware

Supported products & hardware

Products
Isolated DC/DC converters & modules
LM25180-Q1 Automotive 42-VIN PSR flyback converter with 65-V, 1.5-A integrated power MOSFET LM25183 42-VIN no-opto flyback converter with 65-V, 2.5-A integrated MOSFET LM25183-Q1 Automotive 42-VIN no-opto flyback converter with 65-V, 2.5-A integrated MOSFET LM25184 42-VIN no-opto flyback converter with 65-V, 4.1-A integrated MOSFET LM25184-Q1 Automotive 42-VIN no-opto flyback converter with 65-V, 4.1-A integrated MOSFET
Hardware development
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PCB layout

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PCB layout

LM5180EVM-DUAL PCB Layout Files

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Reference designs

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Package Pins Download
WSON (NGU) 8 View options

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