Optimized for AC/DC power supplies in industrial applications, Rohm’s PWM controller ICs support a wide range of power semiconductors. Mass production has begun for four variants: the BD28C55FJ-LB for low-voltage MOSFETs; BD28C54FJ-LB for medium- to high-voltage MOSFETs; BD28C57LFJ-LB for IGBTs; and BD28C57HFJ-LB for SiC MOSFETs.
The parts come in standard SOP-J8 packages (equivalent to JEDEC SOIC8), offering pin-to-pin compatibility with commonly used power supply components to minimize redesign and modification efforts. Each variant includes a self-recovery undervoltage lockout function with voltage hysteresis. According to Rohm, this improves application reliability by reducing threshold voltage error to ±5%, compared to the typical ±10% of standard products.
With an input voltage range of 6.9 V to 28.0 V, the PWM controllers provide a circuit current of 2.0 mA, a maximum startup current of 75 µA, and a maximum duty cycle of 50%. The lineup will be expanded to include products for driving GaN devices and variants that support a maximum duty cycle of 100%.
The BD28C55FJ-LB, BD28C54FJ-LB, BD28C57LFJ-LB, and BD28C57HFJ-LB are now available through Rohm’s authorized distributors.
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