Features: · Transition Mode PFC Controller for Low Implementation Cost· Industry Pin Compatibility With Improved Feature Set· Improved Transient Response With Slew-Rate Comparator· Zero Power Detect to Prevent OVP During Light Load Conditions· Accurate Internal VREF for Tight Output Regulation· Tw...
UCC38051: Features: · Transition Mode PFC Controller for Low Implementation Cost· Industry Pin Compatibility With Improved Feature Set· Improved Transient Response With Slew-Rate Comparator· Zero Power Detect...
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UCCx805x | UNIT | ||
Supply voltage, VC | (Internally clamped) | 20 | V |
Input current into VCC clamp | IDD | 30 | mA |
Input current | ZCD | ±10 | |
Gate drive current (peak), IDRV | DRV | ±750 | |
Input voltage range, VCC | VO_SNS, MULTIN, CS | 5 | V |
Maximum negative voltage | VO_SNS, MULTIN, DRV, CS | −0.5 | |
Power dissipation at TA= 25°C | D package | 650 | mW |
P package | 1 | W | |
Operating junction temperature range, TJ | −55 to 150 | °C | |
Storage temperature, Tstg | −65 to 150 | ||
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds | 30 |
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltages are with respect to GND. Currents are positive into, negative out of the specified terminal.
The UCC38050 and UCC38051 are PFC controllers for low-to-medium power applications requiring compliance with IEC 1000-3-2 harmonic reduction standard. UCC38050 and UCC38051 is designed for controlling a boost preregulator operating in transition mode (also referred to as boundary conduction mode or critical conduction mode operation). UCC38050 and UCC38051 features a transconductance voltage amplifier for feedback error processing, a simple multiplier for generating a current command proportional to the input voltage, a current-sense (PWM) comparator, PWM logic and a totem-pole driver for driving an external FET.