700V Flyback switcher with constant-voltage constant-current and primary-side regulation
Product details
Parameters
Package | Pins | Size
Features
- Constant-Voltage (CV) and Constant-Current (CC) Output Regulation Without Optical-Coupler
- ±5% Output Voltage Regulation Accuracy
- ±5% Output Current Regulation With AC Line and Primary Inductance Tolerance Compensation
- 700-V Start-Up and Smart Power Management Enables <30-mW Standby Power
- 115-kHz Maximum Switching Frequency Design for High-Power Density
- Valley Switching and Frequency Dithering to Ease EMI Compliance
- Thermal Shut Down
- Low Line and Output Over-Voltage Protection
Description
The UCC28910 and UCC28911 are high-voltage flyback switchers that provide output voltageand current regulation without the use of an optical coupler. Both devices incorporate a 700-Vpower FET and a controller that process operating information from the flyback auxiliary windingand power FET to provide a precise output voltage and current control. The integrated high-voltage current source for startup that is switched off during device operation, and the controller current consumption is dynamically adjusted with load. Both enablethe very low stand-by power consumption.
Control algorithms in the UCC28910 and UCC28911, combining switching frequency and peakprimary current modulation, allow operating efficiencies to meet or exceed applicable standards.Discontinuous conduction mode (DCM) with valley switching is used to reduce switching losses.Built-in protection features help to keep secondary and primary component stress levels in check across the operating range. The frequency jitter helps to reduce EMI filter
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | UCC28910, UCC28911 High-Voltage Flyback Switcher with Primary-Side Regulation and Output Current Control datasheet (Rev. D) | Dec. 19, 2016 |
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User guide | Using the UCC28911EVM-718 | Mar. 06, 2015 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The UCC28911EVM-718 evaluation module is an offline Flyback power supply that provides isolated output voltage and current regulation without the use of an optocoupler and secondary-side feedback components. The input accepts a voltage range of 85VAC to 265VAC, 47Hz to 64Hz. The evaluation module (...)
Features
- Isolated 7.5W, 5V output
- Less than 20mW standby power consumption
- Primary side regulation eliminates opto-coupler
- Universal off-line input voltage range
- Output over voltage protection
- Input under voltage protection
- Thermal Shutdown
- Controlled start up and restart after fault Protection
Design tools & simulation
Reference designs
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOIC (D) | 7 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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