To help designers meet strict energy regulations, Fairchild Semiconductor has developed the FAN6224 secondary-side synchronous rectifier (SR) controller to provide design flexibility and improve overall system efficiency.
The FAN6224 is the first SR high- and low-side controller device in Fairchild’s mWSaver™ technology series. Equipped with an internal, adjustable load-level Green Mode operation, the device stops all SR switching operation and provides lower no-load power consumption.
Utilizing a linear-predict timing-control technique, the device employs a simple control method without current-sense circuitry for noise immunity, making it ideally suited for high- and low-side flyback converters in continuous or discontinuous conduction mode (CCM and DCM) and quasi-resonant (QR) systems. For maximum design flexibility, the FAN6224 provides PWM frequency tracking and secondary-side winding voltage and is able to operate in both fixed- and variable-frequency systems up to 140kHz.
Features and Benefits:
-300µA ultra-low Green Mode operating current
-12V gate driver clamp
-Integration of rich protections: OVP, OTP, SCP
-Open/short protection of LPC-pin and RES-pin
Packaging and Pricing Information (in US 1,000 quantity pieces)
Samples available upon request – Delivery 8-12 weeks ARO
-Available in a SO 8L NB package the FAN6224 is priced at $.71