onsemi FAN6921BMR PFC & PWM Controllers
onsemi FAN6921BMR PFC and PWM Controllers combine a Power Factor Correction (PFC) Controller and a quasi-resonant PWM controller. This integration provides a cost-effective design and allows for fewer external components.
The FAN6921BMR PFC uses a controlled on-time technique to provide a regulated DC output voltage and performs natural power factor correction. With an innovative THD optimizer, FAN6921BMR can reduce input current distortion at zero-crossing duration to improve THD performance.
The FAN6921BMR PWM provides several functions to enhance the power system performance, including valley detection, green-mode operation, high/low line overpower compensation.
The onsemi FAN6921BMR Controllers has many protection functions, including secondary-side open-loop and over-current with auto-recovery protection, external latch triggering, adjustable over-temperature protection by RT pin and external NTC resistor, internal over-temperature shutdown, VDD pin OVP, and DET pin over-voltage for output OVP, and brown-in / out for AC input voltage UVP.
The FAN6921BMR Controller is housed in a small 16-pin outline package (SOP).
Features
- Integrated PFC and flyback controller
- Critical mode PFC controller
- Zero-current detection for PFC stage
- Quasi-resonant operation for PWM stage
- Internal minimum tOFF 8ms for QR PWM stage
- Internal 10ms soft-start for PWM
- Brownout protection
- High / low line over-power compensation
- Auto-recovery over-current protection
- Auto-recovery open-loop protection
- Externally latch triggering (RT Pin)
- Adjustable over-temperature latched (RT Pin)
- VDD Pin and output voltage OVP (Latched)
- Internal over-temperature shutdown (140°C)
- Pb-Free device
Applications
- AC/DC NB adapters
- Open-frame SMPS
- Battery charger
Typical Application
