ON Semiconductor Announces NCP4330 MOSFET Driver
ON Semiconductor Corp. (Phoenix, AZ) announced the NCP4330, a post-regulation, dual n-channel MOSFET driver that delivers improved efficiency when implemented in forward converters most commonly found in ATX and high-power switch-mode power supplies (SMPS). The NCP4330 features drive outputs for series FETs and free-wheeling synchronous FETs, to deliver higher efficiency than silicon rectifiers generally used for this purpose.
When compared to traditional magnetic amplifier control circuit solutions, the NCP4330 offers more compact and cost-effective implementation. The NCP4330 offers an efficient means of deriving 3.3 V or other outputs from the 5 V power train, while not requiring additional windings or terminals on the power supply’s power transformer. The secondary ac signal directly feeds the NCP4330 to minimize power dissipation, while reducing the power circuit’s overall part count.
The overlap management technique offered in the NCP4330 allows soft switching, which results in efficient higher-frequency operation. As such, this device is suitable for power supplies operating at frequencies up to 400 kHz, which would include the new generation of ATX as well as telecom dc-dc converters. The NCP4330 device integrates under-voltage lockout and thermal shutdown for rugged designs.
The NCP4330 is offered in the SOIC-8 package, and is priced at $0.90 per unit in 1,000-unit quantities. Production is planned for the second quarter.
