L4984
L4984 is CCM PFC controller manufactured by STMicroelectronics.
CCM PFC controller
Features
- Line-modulated fixed-off-time (LM-FOT) control of CCM-operated PFC pre-regulators
- Proprietary LM-FOT modulator for nearly fixedfrequency operation
- Proprietary multiplier design for minimum THD of AC input current
- Fast “bi-directional” input voltage feedforward (1/V2 correction)
- Accurate adjustable output overvoltage protection
- Protection against feedback loop failure (latched shutdown)
- Inductor saturation protection
- AC brownout detection
- Digital leading-edge blanking on current sense
- Soft-start
- 1% (at Tj = 25 °C) internal reference voltage
- - 600 / + 800 mA totem pole gate driver with active pull-down during UVLO and voltage clamp
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