UCC28050 Series
Transition mode PFC controller with 15.6V/9.7V UVLO and IEC61000-3-2 compliance, -40°C to 105°C
Manufacturer: Texas Instruments
Catalog(2 parts)
| Part | Current - Startup▲▼ | Frequency - Switching▲▼ | Mounting Type | Supplier Device Package | Voltage - Supply▲▼ | Voltage - Supply▲▼ | Package / Case | Package / Case▲▼ | Package / Case▲▼ | Mode | Operating Temperature▲▼ | Operating Temperature▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
0.00007500000356230885 A | 200000 Hz | Through Hole | 8-PDIP | 15.399999618530272 V | 18 V | 8-DIP | 0.007619999814778566 m | 0.007619999814778566 m | Discontinuous (Transition) | -40 °C | 105 °C | |
0.00007500000356230885 A | 200000 Hz | Surface Mount | 8-SOIC | 15.399999618530272 V | 18 V | 8-SOIC | 0.003899999894201755 m | Discontinuous (Transition) | -40 °C | 105 °C |
Key Features
• Transition Mode PFC Controller for Low Implementation CostIndustry Pin Compatibility With Improved Feature SetImproved Transient Response With Slew-Rate ComparatorZero Power Detect to Prevent Overvoltage Protection (OVP) During Light Load ConditionsAccurate Internal VREF for Tight Output RegulationTwo UVLO OptionsOVP, Open-Feedback Protection, and Enable Circuits±750-mA Peak Gate Drive CurrentLow Start-Up and Operating CurrentsLead (Pb)-Free PackagesTransition Mode PFC Controller for Low Implementation CostIndustry Pin Compatibility With Improved Feature SetImproved Transient Response With Slew-Rate ComparatorZero Power Detect to Prevent Overvoltage Protection (OVP) During Light Load ConditionsAccurate Internal VREF for Tight Output RegulationTwo UVLO OptionsOVP, Open-Feedback Protection, and Enable Circuits±750-mA Peak Gate Drive CurrentLow Start-Up and Operating CurrentsLead (Pb)-Free Packages
Description
AI
The UCC38050 and UCC38051 are PFC controllers for low-to-medium power applications requiring compliance with IEC 1000-3-2 harmonic reduction standard. The controllers are designed for a boost preregulator operating in transition mode (also referred to as boundary-conduction mode or critical conduction-mode operation). They feature 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.
In the transition mode operation, the PWM circuit is self-oscillating, with the turnon being governed by an inductor zero-current detector (ZCD pin), and the turnoff being governed by the current-sense comparator. Additionally, the controller provides features such as peak current limit, default timer, overvoltage protection (OVP) and enable.
The UCC38050 and UCC38051 are PFC controllers for low-to-medium power applications requiring compliance with IEC 1000-3-2 harmonic reduction standard. The controllers are designed for a boost preregulator operating in transition mode (also referred to as boundary-conduction mode or critical conduction-mode operation). They feature 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.
In the transition mode operation, the PWM circuit is self-oscillating, with the turnon being governed by an inductor zero-current detector (ZCD pin), and the turnoff being governed by the current-sense comparator. Additionally, the controller provides features such as peak current limit, default timer, overvoltage protection (OVP) and enable.