OB6561PX
DESCRIPTION
OB6561PX is an active transition-mode (TM) power factor correction (PFC) controller for ACDC switching mode power supply applications. OB6561PX features a one quadrant multiplier with THD optimizer for near unity power factor, zero current detector (ZCD) to ensure TM operation, a current sensing parator with built-in leadingedge blanking, and a totem pole output ideally suited for driving a power MOSFET. OB6561PX offers great protection coverage including system over-voltage protection (OVP) to eliminate runaway output voltage due to load removal, VCC under voltage lockout (UVLO), cycle-by-cycle current limiting, multiplier output clamping that limit maximum peak switch current, and gate drive output clamping for external power MOSFET protection. With added system open loop protection feature
, OB6561PX shuts down system when the feedback loop is open.
FEATURES
- Transition Mode (TM) Operation
- One quadrant multiplier with THD optimizer
- Low Start-up Current and...
