LM25180QNGURQ1

The Texas Instruments LM25180QNGURQ1 is an automotive-qualified PSR (Primary-Side Regulation) flyback DC/DC converter designed for reliable and rugged applications. It operates with an input voltage range from 4.5 V to 42 V and includes an integrated 65-V, 0.4-Ω power MOSFET with a switch current limit of 1.5 A. The output current capability is also up to 1.5 A.

This converter operates in peak current mode with a switching frequency adjustable between 12 kHz and 350 kHz. Key features include adjustable output, integrated switch, light load efficiency, pre-bias soft start, and UVLO (undervoltage lockout). The operating junction temperature range is -40°C to 150°C, with a device temperature grade of 1 (-40°C to 125°C ambient).

The LM25180QNGURQ1 is packaged in an 8-WSON (4x4) surface mount package. Its design eliminates the need for an opto-coupler or transformer auxiliary winding for output voltage regulation, reducing solution size and cost. It offers low EMI operation and high efficiency PSR flyback operation, with quasi-resonant switching in boundary conduction mode (BCM) at heavy loads. The device also includes input UVLO and thermal shutdown protection, and hiccup-mode overcurrent fault protection.