Communications Power

Fairchild Intros New FAN7556 PWM Controller

Fairchild Semiconductor International (San Jose, CA) announced the FAN7556, a fixed-frequency, voltage-mode, pulse-width modulation (PWM) controller targeting off-line switch-mode power supply and dc/dc converter applications requiring minimal external components. Typical applications include office equipment such as faxes and printers.

With a power-saving mode current of 200µA (typical) and a standby current of 100µA (typical), the FAN7556's low power consumption means high efficiency in energy-saving designs. The FAN7556 features a current-sensing comparator, a trimmed oscillator for precise duty cycle control, a temperature compensated reference, and a high-current totem pole output suitable for driving a power MOSFET.

The FAN7556 provides over-voltage protection, over-current protection and over-load protection with a built-in auto-restart circuit. The device's broad operating temperature ranges from -25 to +125 degrees C. In addition, the FAN7556 incorporates an on/off control and a soft-start circuit. The product is available in both the DIP-8 and SOP-8 packages.

The FAN7556N is priced at $0.50 each for 1,000 pieces. The FAN7556M/FAN7556MX are priced at $0.55 each for 1,000 pieces. Samples are available now, and production quantities are available in six to eight weeks. Delivery is in 8 to 10 weeks ARO.

Fairchild Semiconductor International
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