New Highly Integrated Motorola SMPS Controller Reduces Power Consumption in stand-By Mode


Phoenix, Arizona -- June 29, 1999 -- An innovative new high performance Switchmode Power Supply (SMPS) controller, introduced by Motorola Semiconductor Components Group today, is designed with multiple on-chip functions that reduce the system power consumption to less than 1.3W in standby mode. This high level of integration in a relatively small package also requires fewer external components - which greatly reduces the overall system cost and increases the efficiency of off-line converter designs.

The new unit, type MC44608, is the latest in a family of GreenLine(tm) SMPS controllers designed to consume less power in standby mode. This device operates in a fully controlled pulsed mode when in standby and provides an option to adjust the burst duty cycle.

The MC44608 incorporates a start-up current source which eliminates the need for an external start-up resistor, thereby greatly reducing the continuous current draw and increasing the system efficiency for fast lossless off-line start-ups. It also features an on-chip oscillator with switching frequencies of 40, 75 or 100KHz.

"The MC44608 is an innovative SMPS control IC that offers features which satisfy major market requirements," commented Scott Delaney, Marketing Director of Motorola's Semiconductor Components Group. " These include efficiency - it consumes very low power in stand-by mode, integration - it incorporates multiple functions on a single chip, compactness - it features a smaller package which requires fewer external components and flexibility - it enables noise control through an external MOSFET."

This new SMPS controller also comprises on-chip safety features that make it ideally suited for efficient and highly reliable power supply designs in TVs, VCRs, printers and other consumer and industrial designs. It includes a fail-safe open loop for SMPS run away protection, demagnetisation detection, maximum duty cycle, current limitation, thermal and over-voltage protection.

The MC44608 is available in a DIP-8 package with samples and production quantities now available. Pricing is suggested at $0.75 for quantities 10K.

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Yinka Massally
Public Relations Manager
ON Semiconductor
Majid Eshaghi
ON Semiconductor

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