TI LM25184QNGURQ1

The LM25184-Q1 is a primary-side regulation (PSR) flyback converter with high efficiency over a wide 4.5V to 42V input voltage range, sampling the isolated output voltage via the primary-side flyback voltage. High integration enables simple, reliable, high-density designs with only a single component crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetics solution with load and line regulation better than ±1.5%. An integrated 65V power MOSFET supports up to 15W output power and provides increased margin against line transients.

The LM25184-Q1 simplifies isolated DC/DC power supply implementation, with optional features to optimize performance for target end equipment. Output voltage is set with a single resistor, while an optional resistor improves output voltage accuracy by compensating for the temperature coefficient of the flyback diode voltage drop. Additional features include internal fixed or externally programmable soft-start, a precision enable input with hysteresis for adjustable line UVLO, hiccup-mode overload protection, and thermal shutdown with automatic recovery.

The LM25184-Q1 converter is AEC-Q100 Grade 1 qualified and available in an 8-pin WSON package with 0.8mm pitch and wettable flanks.

• AEC-Q100 qualified, device temperature grade 1: ambient temperature range -40°C to 125°C for automotive applications
• Functional safety capable
• Designed for robust and reliable applications – wide input voltage range of 4.5V to 42V, stable and reliable solution with only one component crossing the isolation barrier
• ±1.5% total output regulation accuracy
• Optional VOUT temperature compensation
• Junction temperature range: -40°C to +150°C
• Reduced solution size and cost through integrated technology – integrated 65V, 0.11Ω power MOSFET
• VOUT regulation without optocoupler or transformer auxiliary winding
• High-efficiency PSR flyback operation
• Quasi-resonant turn-off of MOSFET in BCM mode
• Single-output and multi-output implementation support
• Ultra-low EMI conducted and radiated emissions
• Soft switching eliminates diode reverse recovery
• Optimized for CISPR 25 Class 5 requirements
• Custom flyback regulator designs using WEBENCH Power Designer

• Automotive HEV/EV powertrain systems
• Automotive body electronics below AM band
• Traction inverters: IGBT and SiC driver power supplies