OB6573
DESCRIPTION
OB6573 is a 8-pin active power factor correction (PFC) controller designed to operate in continuous conduction mode (CCM) with average current control. It provides near unity power factor for universal input line voltage (85VAC
- 265VAC) with no need to sense the line input voltage. The IC allows major reductions in Bill of Materials (BOM) ponent count, PCB area and design time pared to traditional solutions. The switching frequency of OB6573 is trimmed and fixed internally at 65KHz. To achieve good EMI performance, the built-in frequency shuffling is provided. Both pensation for the voltage loop and the current loop are external to allow full user control. Fast 1.5A gate drive capability minimizes the need for external driver circuit. OB6573 offers prehensive protections to ensure safe system operation conditions including cycle by cycle over current protection(OCP), soft over current protection(SOCP), VCC under voltage lockout (UVLO), VCC clamping, open loop protection...
