Product Summary

The UCC38050D is a PFC controller for low-to-medium power applications requiring compliance with IEC 1000-3-2 harmonic reduction standard. It is designed for controlling a boost preregulator operating in transition mode (also referred to as boundary conduction mode or critical conduction mode operation). The UCC38050D features a trans-conductance 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. The applications of the UCC38050D include Switch-Mode Power Supplies for Desktops, Monitors, TVs and Set Top Boxes (STBs), AC Adapter Front-End Power Supplies, Electronic Ballasts.

Parametrics

UCC38050D absolute maximum ratings: (1)Supply voltage, VCC (Internally clamped): 20 V; (2)Input current into VCC clamp IDD: 30mA; (3)Input current ZCD: ±10mA; (4)Gate drive current (peak), IDRV DRV: ±750mA; (5)Input voltage range, VCC VO_SNS, MULTIN, CS: 5V; (6)Maximum negative voltage VO_SNS, MULTIN, DRV, CS: -0.5V; (7)Power dissipation at TA= 50℃ D package: 650 mW; (8)P package: 1 W; (9)Operating junction temperature range, TJ: -55 to 150℃; (10)Storage temperature, Tstg: -65 to 150℃; (11)Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: 300℃.

Features

UCC38050D features: (1)Transition Mode PFC Controller for Low Implementation Cost; (2)Industry Pin Compatibility With Improved Feature Set; (3)Improved Transient Response With Slew-Rate Comparator; (4)Zero Power Detect to Prevent OVP During Light Load Conditions; (5)Accurate Internal VREF for Tight Output Regulation; (6)Two UVLO Options; (7)Overvoltage Protection (OVP), Open-Feedback Protection and Enable Circuits; (8)±750mA Peak Gate Drive Current; (9)Low Start-Up and Operating Currents; (10)Lead (Pb)-Free Packages.

Diagrams

UCC38050D block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
UCC38050D
UCC38050D
Texas Instruments
Power Factor Correction ICs Transition Mode PFC Controller
Data Sheet
0-1: $1.45
1-25: $1.33
25-100: $1.06
100-250: $0.89
UCC38050DG4
UCC38050DG4
Texas Instruments
Power Factor Correction ICs Transition Mode PFC Cntrlr
Data Sheet
0-1: $1.45
1-25: $1.22
25-100: $1.06
100-250: $0.89
UCC38050DRG4
UCC38050DRG4
Texas Instruments
Power Factor Correction ICs Transition Mode PFC Controller
Data Sheet
0-1790: $0.63
1790-2000: $0.59
2000-2500: $0.59
2500-5000: $0.58
UCC38050DR
UCC38050DR
Texas Instruments
Power Factor Correction ICs Transition Mode PFC Controller
Data Sheet
0-1790: $0.63
1790-2000: $0.59
2000-2500: $0.59
2500-5000: $0.58