R2A20111DDU0

R2A20111SP/DD Power Factor Correction Controller IC REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Description The R2A20111 is a power-factor correction (PFC) controller IC. This IC adopts continuous conduction mode as PFC operation. Various functions such as constant power limit, overvoltage detection, overcurrent detection, soft start, feedback-loop disconnection detection, and holding function of PFC operation through momentary outage (PFC hold function) are incorporated in a single chip. These functions reduce external circuitry. The constant power limit function allows to eliminate a significant amount of coil noise which is generated due to overcurrent detection operation in case of conventional overload. The PFC hold function enables quick recovery by continuing PFC operation after momentary outage. The hold time can be adjusted by an external capacitance. Overcurrent detection pin is separately provided. Latch mode shutdown function is incorporated. A soft-start control pin provides for the easy adjustment of soft-start operation, and can be used to prevent overshooting of the output voltage. Features • Maximum ratings ⎯ Power-supply voltage Vcc: 24 V ⎯ Operating junction temperature Tjopr: – 40 to 125°C • Electrical characteristics ⎯ VREF output voltage VREF: 5.0 V ± 3% ⎯ UVLO operation start voltage VH: 10.5 ± 0.9 V ⎯ UVLO operation stop voltage VL: 9.0 ± 0.7 V ⎯ PFC output maximum ON duty Dmax-out: 95% (typ.) • Functions ⎯ Constant power limit function ⎯ Continuous conduction mode ⎯ Hold function of PFC operation on momentary outage (PFC hold function) ⎯ Overvoltage detection ⎯ Overcurrent detection ⎯ Soft start ⎯ Feedback loop disconnection detection ⎯ IC shutdown function ⎯ Package lineup: SOP-16 and DILP-16 Applications • • • • Flat panel display Projector Desktop PC White goods REJ03F0231-0100 Rev.1.00 Mar 28, 2007 Page 1 of 40 R2A20111SP/DD Ordering Information Part No. R2A20111SPW0 R2A20111DDU0 Package Name FP-16DAV DP-16FV Package Code PRSP0016DH-B PRDP0016AE-B Taping Spec. 2000 pcs./one taping product — System Diagram Rec+ 150 μH B+ 680k To FB 680k B+ OUT (385V dc) T1 Q1 Rec– From OUT 470μF ×2 (450V) from auxiliary 24V 4.7μ VRB1 GND VCC 16 62k RT 9 VREF 5V Internal Bias 3.6V 0.65V H 10.5V 27.5V L 9.0V UVLO 5V VREF Generator 6 VREF In GOOD Out VREF 0.1μ CT 10 390p Reset: Vcc