Catalog(1 parts)
| Part | Mounting Type | Operating Temperature▲▼ | Operating Temperature▲▼ | Supplier Device Package | Voltage - Supply▲▼ | Voltage - Supply▲▼ | Package / Case | Package / Case▲▼ | Frequency - Switching▲▼ | Frequency - Switching▲▼ | Mode |
|---|---|---|---|---|---|---|---|---|---|---|---|
Surface Mount | 125 °C | -40 °C | 16-SOIC | 18 V | 11 V | 16-SOIC | 0.003911599982529879 m, 3.900000095367432 ul | 87000 Hz | 109000 Hz | Continuous Conduction (CCM) |
Key Features
• High Efficiency PFC and Half-Bridge Resonant LLC Combo ControllerContinuous Conduction Mode (CCM) Boost Power Factor CorrectionSupports Self-Bias or Auxiliary (external) Bias Mode of OperationPFC Loops Fully Internally CompensatedPFC Stage Design in 3 Easy Steps(design voltage feedback, current feedback and power stage)Fixed 100-kHz PFC Frequency with Dithering for Ease of EMI ComplianceTrue Input Power Limit, Independent of Line VoltageFixed LLC Frequency Operating Range of 70 kHz to 350 kHzDead-Time Varied Across Load Range for LLC Half-Bridge Power Stage to Extend ZVS RangeThree-Level LLC Over-Current ProtectionHiccup Mode Operation for Continuous Overload and Short-Circuit Power ProtectionLow Standby Power Consumption Enabled by Active Control of High-Voltage Start-Up MOSFET and X-Cap Discharge FunctionBuilt In Soft-Start and Converter Sequencing to Simplify DesignAC Line Brownout Protection, with Fail IndicatorPFC Bus Over-Voltage and Under-Voltage ProtectionOver-Temperature ProtectionExternal Gate Drivers for Scalability with Power LevelSOIC-16 PackageHigh Efficiency PFC and Half-Bridge Resonant LLC Combo ControllerContinuous Conduction Mode (CCM) Boost Power Factor CorrectionSupports Self-Bias or Auxiliary (external) Bias Mode of OperationPFC Loops Fully Internally CompensatedPFC Stage Design in 3 Easy Steps(design voltage feedback, current feedback and power stage)Fixed 100-kHz PFC Frequency with Dithering for Ease of EMI ComplianceTrue Input Power Limit, Independent of Line VoltageFixed LLC Frequency Operating Range of 70 kHz to 350 kHzDead-Time Varied Across Load Range for LLC Half-Bridge Power Stage to Extend ZVS RangeThree-Level LLC Over-Current ProtectionHiccup Mode Operation for Continuous Overload and Short-Circuit Power ProtectionLow Standby Power Consumption Enabled by Active Control of High-Voltage Start-Up MOSFET and X-Cap Discharge FunctionBuilt In Soft-Start and Converter Sequencing to Simplify DesignAC Line Brownout Protection, with Fail IndicatorPFC Bus Over-Voltage and Under-Voltage ProtectionOver-Temperature ProtectionExternal Gate Drivers for Scalability with Power LevelSOIC-16 Package
Description
AI
The UCC29950 provides all the control functionality for an AC-to-DC converter with a CCM boost Power Factor Correction (PFC) stage followed by an LLC converter stage. The controller is optimized to allow ease of use.
Proprietary CCM PFC algorithms enable the system to achieve high efficiency, smaller converter size with high power factor. The integrated LLC controller enables a high-efficiency DC-to-DC conversion stage utilizing soft switching for low EMI noise. Integration of PFC control and LLC control in a combo controller allows the control algorithms to take advantage of information from both stages.
The controller includes a control circuit for start-up using a Depletion Mode MOSFET with internal device power management that minimizes external component requirements and helps lower system implementation costs.
To further reduce the standby power an X-Cap discharge circuit is integrated. The UCC29950 implements a complete suite of system protection functions, including AC line brownout, PFC bus under voltage PFC and LLC, over current and thermal shutdown.
The UCC29950 provides all the control functionality for an AC-to-DC converter with a CCM boost Power Factor Correction (PFC) stage followed by an LLC converter stage. The controller is optimized to allow ease of use.
Proprietary CCM PFC algorithms enable the system to achieve high efficiency, smaller converter size with high power factor. The integrated LLC controller enables a high-efficiency DC-to-DC conversion stage utilizing soft switching for low EMI noise. Integration of PFC control and LLC control in a combo controller allows the control algorithms to take advantage of information from both stages.
The controller includes a control circuit for start-up using a Depletion Mode MOSFET with internal device power management that minimizes external component requirements and helps lower system implementation costs.
To further reduce the standby power an X-Cap discharge circuit is integrated. The UCC29950 implements a complete suite of system protection functions, including AC line brownout, PFC bus under voltage PFC and LLC, over current and thermal shutdown.