Product Overview MC33368: High Voltage Power Factor Correction Controller For complete documentation, see the data sheet Product Description The MC33368 is an active power factor controller that functions as a boost preconverter in off-line power supply applications. MC33368 is optimized for low power, high density power supplies requiring a minimum board area, reduced component count and low power dissipation. The narrow body SOIC package provides a small footprint. Integration of the high voltage startup saves approximately 0.7 W of power compared to resistor bootstrapped circuits. The MC33368 features a watchdog timer to initiate output switching, a one quadrant multiplier to force the line current to follow the instantaneous line voltage a zero current detector to ensure critical conduction operation, a transconductance error amplifier, a current sensing comparator, a 5.0 V reference, an undervoltage lockout (UVLO) circuit which monitors the VCC supply voltage and a CMOS driver for driving MOSFETs. The MC33368 also includes a programmable output switching frequency clamp. Protection features include an output overvoltage comparator to minimize overshoot, a restart delay timer and cycle-by-cycle current limiting. Features • • • • • Lossless Off-Line Startup Output Overvoltage Comparator Leading Edge Blanking (LEB) for Noise Immunity Watchdog Timer to Initiate Switching Restart Delay Timer Applications End Products • Active Power Factor Control • Off-Line Power Supplies Part Electrical Specifications Product Compliance Status PFC Mode Freque Control Topolo ncy Mode gy Operati on fSW Typ VCC (kHz) Max (V) Drive Cap. (mA) UVLO (V) Latch UVP Inhibiti on Packag e Type MC33368DG Pb-free Active CRM Variabl e Current StepMode Up Variabl e 16 1000 / 1000 8.5 13 Yes No Yes SOIC16 Active CRM Variabl e Current StepMode Up Variabl e 16 1000 / 1000 8.5 13 Yes No Yes SOIC16 Halide free MC33368DR2G Pb-free Halide free For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016