Date: 09/03/2011

Mobile phone charger IC with low stand by current

Fairchild Semiconductor has developed the FAN302HL PWM controller IC for mobile phone charger applications. The FAN302HL is designed to minimize standby input power consumption to <10mW@230VAC meeting ENERGY STAR Program Requirements for Computers Version 5.0 efficiency standards.

This power IC has on-chip 500V JFET and offers protection features such as cycle-to-cycle current limiting to ensure a fixed peak current limit level, even if a short circuit occurs, and the gate output is also clamped at 15V to protect the power MOSFET from high gate-source voltage damages.

The FAN302HL does not require an external secondary-side over-voltage protection (OVP) circuit. If either VS pin OVP or internal over-temperature protection is triggered, the device enters latch mode until AC power is removed, saving second side OVP components and tightening VO protection (<6V).

Primary side regulation control for constant current and no second side current sensing provides lower losses and improved efficiency. Proprietary burst mode operation, with lower operation current, minimizes the standby power consumption.

FAN302HL uses secondary-side regulation for constant voltage with good dynamic response, meeting USB 2.0 specifications. By using the FAN302HL, a charger can be implemented with fewer external components, minimizing cost when compared to conventional designs or a linear transformer claims Farichild.

FAN302HL is suggested for applications such as smartphones, cordless phones, DVD/Set-Top Boxes, Power Over Ethernet and small appliances.

The FAN302HL, available in an 8-pin, small outline package, offers a fixed PWM frequency at 85kHz with frequency hopping to reduce EMI.

Availability: Samples available now
Price: US $00.50 in 1,000 quantity pieces
Delivery: 8-10 weeks ARO

For more info visit www.fairchildsemi.com.