The ROHM BD8372HFP-MTR is a single-channel linear LED driver rated for automotive applications, delivering up to 200 mA to a single LED string. It accepts a supply voltage from 5.5 V to 40 V, covering the full automotive battery range including cold-crank and load-dump transients without external clamping. The linear topology means no switching noise on the output, which simplifies EMI compliance for interior lighting clusters or indicator lamps.
Automotive qualification — what AEC-Q grade, exactly?
The part carries an Automotive grade and is listed as Active. The OEM auditor will expect PPAP documentation tied to the AEC-Q100 qualification; the active lifecycle status means ROHM continues to support new designs with standard lead times and no last-time-buy risk.
The 200 mA output per channel sets the maximum LED string current. For a typical 3-LED daytime-running-light string at 100 mA, the part runs well below its ceiling, leaving headroom for derating at high ambient. The 5.5 V minimum supply means it can regulate through a 12 V battery during cranking when the rail dips below 6 V. The 40 V maximum handles unclamped load-dump events up to 40 V without sacrificing the downstream LEDs.
Package and thermal — HRP-7 layout note
The HRP-7 package (7 leads plus exposed tab) is a surface-mount power package. The tab is electrically connected to ground (substrate), so no isolation pad is needed, but the PCB land pattern must match the datasheet footprint for reliable solder joint formation.