LM25184-Q1 Series

Automotive 42-VIN no-opto flyback converter with 65-V, 4.1-A integrated MOSFET

Catalog

Automotive 42-VIN no-opto flyback converter with 65-V, 4.1-A integrated MOSFET

Part	Package / Case	Output Configuration	Number of Outputs	Supplier Device Package	Qualification	Operating Temperature [Max]	Operating Temperature [Min]	Grade	Mounting Type	Frequency - Switching [Max]	Frequency - Switching [Min]	Synchronous Rectifier	Voltage - Output (Min/Fixed)	Voltage - Input (Min) [Min]	Output Type	Current - Output	Function	Topology	Voltage - Input (Max) [Max]
Texas Instruments LM25184QNGURQ1	8-WDFN Exposed Pad	Positive	1	8-WSON (4x4)	AEC-Q100	150 °C	-40 °C	Automotive	Surface Mount Wettable Flank	350 kHz	12 kHz		12 V	4.5 V	1.81 mOhm	4.1 A	Step-Up/Step-Down	Flyback	42 V
Texas Instruments LM25184NGUR	8-WDFN Exposed Pad	Positive	1	8-WSON (4x4)		150 °C	-40 °C		Surface Mount Wettable Flank	350 kHz	12 kHz		12 V	4.5 V	1.81 mOhm	4.1 A	Step-Up/Step-Down	Flyback	42 V

Catalog

Automotive 42-VIN no-opto flyback converter with 65-V, 4.1-A integrated MOSFET

Key Features

• AEC-Q100-qualified for automotive applicationsDevice temperature grade 1: –40°C to 125°C ambient temperature rangeFunctional Safety-CapableDocumentation available to aid functional safety system designDesigned for reliable and rugged applicationsWide input voltage range of 4.5 V to 42 VRobust solution with only one component crossing the isolation barrier±1.5% total output regulation accuracyOptional VOUTtemperature compensation–40°C to +150°C junction temperature rangeIntegration reduces solution size and costIntegrated 65-V, 0.11-Ω power MOSFETNo optocoupler or transformer auxiliary winding required for VOUTregulationHigh-efficiency PSR flyback operationQuasi-resonant MOSFET turnoff in BCMSingle- and multi-output implementationsUltra-low conducted and radiated EMI signaturesSoft switching avoids diode reverse recoveryOptimized for CISPR 25 Class 5 requirementCreate a custom flyback regulator design usingWEBENCH Power DesignerAEC-Q100-qualified for automotive applicationsDevice temperature grade 1: –40°C to 125°C ambient temperature rangeFunctional Safety-CapableDocumentation available to aid functional safety system designDesigned for reliable and rugged applicationsWide input voltage range of 4.5 V to 42 VRobust solution with only one component crossing the isolation barrier±1.5% total output regulation accuracyOptional VOUTtemperature compensation–40°C to +150°C junction temperature rangeIntegration reduces solution size and costIntegrated 65-V, 0.11-Ω power MOSFETNo optocoupler or transformer auxiliary winding required for VOUTregulationHigh-efficiency PSR flyback operationQuasi-resonant MOSFET turnoff in BCMSingle- and multi-output implementationsUltra-low conducted and radiated EMI signaturesSoft switching avoids diode reverse recoveryOptimized for CISPR 25 Class 5 requirementCreate a custom flyback regulator design usingWEBENCH Power Designer

Description

The LM25184-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. 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 15 W with enhanced headroom for line transients. The LM25184-Q1 simplifies the 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, precision enable input with hysteresis for adjustable line UVLO, hiccup-mode overload protection, and thermal shutdown protection with automatic recovery. The LM25184-Q1 converter 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 LM25184-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. 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 15 W with enhanced headroom for line transients. The LM25184-Q1 simplifies the 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, precision enable input with hysteresis for adjustable line UVLO, hiccup-mode overload protection, and thermal shutdown protection with automatic recovery. The LM25184-Q1 converter 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.