UCC28730 Series
Zero standby PSR flyback controller with CVCC and wake-up monitoring
Manufacturer: Texas Instruments
Catalog(2 parts)
| Part | Regulator Topology | Main Purpose | Utilized IC / Part | Power - Output▲▼ | Current - Output▲▼ | Supplied Contents | Frequency - Switching▲▼ | Board Type | Outputs and Type | Outputs and Type▲▼ | Voltage - Output▲▼ | Voltage - Input▲▼ | Voltage - Input▲▼ | Frequency - Switching▲▼ | Frequency - Switching▲▼ | Fault Protection | Supplier Device Package | Output Isolation | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Voltage - Start Up▲▼ | Package / Case | Package / Case▲▼ | Package / Case▲▼ | Package / Case▲▼ | Mounting Type | Internal Switch(s)▲▼ | Topology |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments UCC28730EVM-552UCC24650, UCC28730 - AC/DC, Primary and Secondary Side 1, Isolated Outputs Evaluation Board | Flyback | AC/DC, Primary and Secondary Side | UCC24650, UCC28730 | 10 W | 2 A | Board(s) | 28000 Hz | Fully Populated | Isolated | 1 ul | 5 V | 85 Vrms | 265 Vrms | |||||||||||||||||
83000 Hz | 32 Hz | Current Limiting, Over Voltage | 7-SOIC | Isolated | 35 V | 9 V | 125 °C | -40 °C | 21 V | 8-SOIC | 7 ul | 0.003911599982529879 m | 3.900000095367432 ul | Surface Mount | Flyback |
Key Features
• EnablesZero-Power(<5 mW) standby consumptionSmartWake-Updetection enables smallest output capacitancePrimary-side regulation (PSR) eliminates optocoupler±5% voltage regulation and current regulation across line and load700-V start-up switch83-kHz maximum switching frequency enables low stand-by power charger designsResonant-ring valley-switching operation for highest overall efficiencyFrequency-dither to ease EMI complianceClamped gate-drive output for MOSFETOvervoltage, low-line, and overcurrent protection functionsProgrammable cable compensationSOIC-7 packageEnablesZero-Power(<5 mW) standby consumptionSmartWake-Updetection enables smallest output capacitancePrimary-side regulation (PSR) eliminates optocoupler±5% voltage regulation and current regulation across line and load700-V start-up switch83-kHz maximum switching frequency enables low stand-by power charger designsResonant-ring valley-switching operation for highest overall efficiencyFrequency-dither to ease EMI complianceClamped gate-drive output for MOSFETOvervoltage, low-line, and overcurrent protection functionsProgrammable cable compensationSOIC-7 package
Description
AI
The UCC28730 isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler, andwake-upsignal detection to improve transient response to large load steps. A minimum switching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Thewake-upmonitoring works with a secondary-side alarm device such as the UCC24650 to deliver rapid response to heavy load steps using minimal output capacitance.
An internal 700-V start-up switch, dynamically- controlled operating states and a tailored modulation profile support ultra-low stand-by power without sacrificing start-up time or output transient response. Control algorithms in the UCC28730 allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) operation with valley-switching reduces switching losses. Modulation of the switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.
The UCC28730 isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler, andwake-upsignal detection to improve transient response to large load steps. A minimum switching frequency of 30 Hz facilitates achieving less than 5 mW of no-load power. This device processes information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Thewake-upmonitoring works with a secondary-side alarm device such as the UCC24650 to deliver rapid response to heavy load steps using minimal output capacitance.
An internal 700-V start-up switch, dynamically- controlled operating states and a tailored modulation profile support ultra-low stand-by power without sacrificing start-up time or output transient response. Control algorithms in the UCC28730 allow operating efficiencies to meet or exceed applicable standards. Discontinuous conduction mode (DCM) operation with valley-switching reduces switching losses. Modulation of the switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.