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TI UCC28740DR
| Hersteller | |
| Herst.-Teilenr. | UCC28740DR |
| LCSC-Nr. | C182073 |
| Verp. | SOIC-7 |
| Kundennummer | |
| Hauptmerkm. | Constant-Voltage Constant-Current Flyback Controller Using Optocoupled Feedback |
| Datenblatt | TI UCC28740DR |
| RoHS-Konformität | 2 Dokumente verfügbar |
| Alternativteile | 1 |
Produktspezifikationen
| Typ | Beschreibung | |
|---|---|---|
| Kategorie | Integrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers | |
| Hersteller | TI | |
| Verp. | SOIC-7 | |
| Operating Temperature | -40℃~+125℃ | |
| Output Current | - | |
| Frequency - Switching | 170Hz~100kHz | |
| Pd - Power Dissipation | - | |
| Voltage - Breakdown | 700V | |
| Voltage - Supply | 9V~35V | |
| Features | Constant Current Mode (CC);Constant Voltage (CV);Over Voltage Protection;Over Current Protection;Overtemperature protection (OTP);Short Circuit Protection | |
| Topology | Flyback | |
| Output Voltage | - | |
| Duty Cycle(Max) | - | |
| Working Mode | DCM | |
| Feedback System | Secondary-Side Feedback |
| Typ | Beschreibung | |
|---|---|---|
| Kategorie | Integrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers | |
| Hersteller | TI | |
| Verp. | SOIC-7 | |
| Operating Temperature | -40℃~+125℃ | |
| Output Current | - | |
| Frequency - Switching | 170Hz~100kHz | |
| Pd - Power Dissipation | - | |
| Voltage - Breakdown | 700V |
| Typ | Beschreibung | |
|---|---|---|
| Voltage - Supply | 9V~35V | |
| Features | Constant Current Mode (CC);Constant Voltage (CV);Over Voltage Protection;Over Current Protection;Overtemperature protection (OTP);Short Circuit Protection | |
| Topology | Flyback | |
| Output Voltage | - | |
| Duty Cycle(Max) | - | |
| Working Mode | DCM | |
| Feedback System | Secondary-Side Feedback |
Beschreibung
The UCC28740 isolated-flyback power-supply controller provides Constant-Voltage (CV) using an optical coupler to improve transient response to large-load steps. Constant-Current (CC) regulation is accomplished through Primary-Side Regulation (PSR) techniques. This device processes information from opto-coupled feedback and an auxiliary flyback winding for precise high-performance control of output voltage and current.
An internal 700-V startup switch, dynamically controlled operating states, and a tailored modulation profile support ultra-low standby power without sacrificing startup time or output transient response.
Control algorithms in the UCC28740 allow operating efficiencies to meet or exceed applicable standards. The drive output interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley-switching reduces switching losses. Modulation of switching frequency and primary current-peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.
The controller has a maximum switching frequency of 100 kHz and always maintains control of the peak-primary current in the transformer. Protection features keep primary and secondary component stresses in check. A minimum switching frequency of 170 Hz facilitates the achievement of less than 10-mW no-load power.
Merkmale
- Less than 10-mW No-Load Power Capability
- Optocoupled Feedback for CV, and Primary-Side Regulation (PSR) for CC
- Enables ±1% Voltage Regulation and ±5% Current Regulation Across Line and Load
- 700-V Startup Switch
- 100-kHz Maximum Switching Frequency Enables High-Power-Density Charger Designs
- Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency
- Frequency Dithering to Ease EMI Compliance
- Clamped Gate-Drive Output for MOSFET
- Overvoltage, Low-Line, and Overcurrent Protection Functions
- SOIC-7 Package
- Create a Custom Design Using the UCC28740 With the WEBENCH Power Designer
Anwendungen
- USB-Compliant Adapters and Chargers for Consumer Electronics
- Smart Phones Tablet Computers Cameras
- Standby Supply for TV and Desktop
- White Goods
Produktspezifikationen
| Typ | Beschreibung | |
|---|---|---|
| Kategorie | Integrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers | |
| Hersteller | TI | |
| Verp. | SOIC-7 | |
| Operating Temperature | -40℃~+125℃ | |
| Output Current | - | |
| Frequency - Switching | 170Hz~100kHz | |
| Pd - Power Dissipation | - | |
| Voltage - Breakdown | 700V | |
| Voltage - Supply | 9V~35V | |
| Features | Constant Current Mode (CC);Constant Voltage (CV);Over Voltage Protection;Over Current Protection;Overtemperature protection (OTP);Short Circuit Protection | |
| Topology | Flyback | |
| Output Voltage | - | |
| Duty Cycle(Max) | - | |
| Working Mode | DCM | |
| Feedback System | Secondary-Side Feedback |
| Typ | Beschreibung | |
|---|---|---|
| Kategorie | Integrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers | |
| Hersteller | TI | |
| Verp. | SOIC-7 | |
| Operating Temperature | -40℃~+125℃ | |
| Output Current | - | |
| Frequency - Switching | 170Hz~100kHz | |
| Pd - Power Dissipation | - | |
| Voltage - Breakdown | 700V |
| Typ | Beschreibung | |
|---|---|---|
| Voltage - Supply | 9V~35V | |
| Features | Constant Current Mode (CC);Constant Voltage (CV);Over Voltage Protection;Over Current Protection;Overtemperature protection (OTP);Short Circuit Protection | |
| Topology | Flyback | |
| Output Voltage | - | |
| Duty Cycle(Max) | - | |
| Working Mode | DCM | |
| Feedback System | Secondary-Side Feedback |
Beschreibung
The UCC28740 isolated-flyback power-supply controller provides Constant-Voltage (CV) using an optical coupler to improve transient response to large-load steps. Constant-Current (CC) regulation is accomplished through Primary-Side Regulation (PSR) techniques. This device processes information from opto-coupled feedback and an auxiliary flyback winding for precise high-performance control of output voltage and current.
An internal 700-V startup switch, dynamically controlled operating states, and a tailored modulation profile support ultra-low standby power without sacrificing startup time or output transient response.
Control algorithms in the UCC28740 allow operating efficiencies to meet or exceed applicable standards. The drive output interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley-switching reduces switching losses. Modulation of switching frequency and primary current-peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.
The controller has a maximum switching frequency of 100 kHz and always maintains control of the peak-primary current in the transformer. Protection features keep primary and secondary component stresses in check. A minimum switching frequency of 170 Hz facilitates the achievement of less than 10-mW no-load power.
Merkmale
- Less than 10-mW No-Load Power Capability
- Optocoupled Feedback for CV, and Primary-Side Regulation (PSR) for CC
- Enables ±1% Voltage Regulation and ±5% Current Regulation Across Line and Load
- 700-V Startup Switch
- 100-kHz Maximum Switching Frequency Enables High-Power-Density Charger Designs
- Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency
- Frequency Dithering to Ease EMI Compliance
- Clamped Gate-Drive Output for MOSFET
- Overvoltage, Low-Line, and Overcurrent Protection Functions
- SOIC-7 Package
- Create a Custom Design Using the UCC28740 With the WEBENCH Power Designer
Anwendungen
- USB-Compliant Adapters and Chargers for Consumer Electronics
- Smart Phones Tablet Computers Cameras
- Standby Supply for TV and Desktop
- White Goods
C182073 EasyEDA-Bibliothek
Compliance & Exportcodes
| Typ | Details |
|---|---|
| RoHS | ROHS3 Compliant |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
| Typ | Details |
|---|---|
| RoHS | ROHS3 Compliant |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Typ | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |