FAN6921MRMY Lipo Battery Power Path Management IC Brownout Protection For Battery Charger
microchip battery management
,power management integrated circuit
FAN6921MRMY Power Path Management IC PFC Crtcl Md PFC & Quasi Res Cur Md PWM Cntlr
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 8 μs for QR PWM Stage
- Internal 10 ms 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)
Applications
- AC/DC NB Adapters
- Open-Frame SMPS
- Battery Charger
Description
The highly integrated FAN6921MR combines Power Factor Correction (PFC) controller and Quasi-Resonant PWM controller. Integration provides cost effect design and allows for fewer external components.
For PFC, FAN6921MR uses a controlled on-time technique to provide a regulated DC output voltage and to perform natural power factor correction. With an innovative THD optimizer, FAN6921MR can reduce input current distortion at zero-crossing duration to improve THD performance.
For PWM, FAN6921MR provides several functions to enhance the power system performance: valley detection, green-mode operation, high / low line over power compensation. FAN6921MR provides many protection functions as well: 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 FAN6921MR controller is available in a 16-pin small outline package (SOP).
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