Constant-voltage, constant-current PWM with PSR, valley switching & Programmable cable compensation
Product details
Parameters
Package | Pins | Size
Features
- < 10-mW No-Load Power
- Primary-Side Regulation (PSR) Eliminates Opto-Coupler
- ±5% Voltage and Current Regulation Across Line and Load
- 700-V Start-Up Switch
- 100-kHz Maximum Switching Frequency Enables High-Power Density Charger Designs
- Resonant Valley-Switching Operation for Highest Overall Efficiency
- Frequency Jitter to Ease EMI Compliance
- Wide VDD Range Allows Small Bias Capacitor
- Clamped Gate-Drive Output for MOSFET
- Overvoltage, Low-Line, and Overcurrent Protection Functions
- Programmable Cable Compensation (UCC28710)
- NTC Resistor Interface (UCC28711, UCC28712 and UCC28713) with Fixed Cable Compensation Options
- SOIC-7 Package
- Create a Custom Design Using the UCC28710 With the WEBENCH® Power Designer
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Description
The UCC2871x family of flyback power supply controllers provides isolated-output Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current.
An internal 700-V start-up switch, dynamically-controlled operating states and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response.
Control algorithms in the UCC28710 family allow operating efficiencies to meet or exceed applicable standards. The output drive 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 controllers have a maximum switching frequency of 100 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28710 allow the cable compensation to be programmed. The UCC28711, UCC28712 and UCC28713 devices allow remote temperature sensing using a negative temperature coefficient (NTC) resistor while providing fixed cable-compensation levels.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | UCC2871x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation datasheet (Rev. C) | Jun. 30, 2017 |
| White paper | Power Electronics in Motor Drives: Where is it? (Rev. A) | Oct. 01, 2019 | |
| Application note | Minimize Standby Consumption for UCC287XX Family | Aug. 01, 2019 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | Jun. 25, 2018 | |
| Application note | Troubleshooting TI PSR controllers | Oct. 03, 2016 | |
| White paper | Control Challenges for Low Power AC/DC Converters | Oct. 02, 2015 | |
| White paper | Control Challenges for Low Power AC/DC Converters (PPT) | Oct. 02, 2015 | |
| Technical articles | Designing multiple output converters with primary side sensing | Aug. 04, 2015 | |
| Technical articles | Power Tips: Powering the IoT in Our Homes | Jun. 11, 2014 | |
| More literature | Exposing the Inner Behavior of a Quasi-Resonant Flyback Converter | Oct. 29, 2013 | |
| Technical articles | Power Tips: AC/DC phone and tablet chargers | Aug. 20, 2013 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
This is a high efficiency 65W AC/DC design using UCC24630 Synchronous Rectification Controller for a Universal input (85Vac to 265Vac) to 19.5V @3.33A output exceeding CoC-5 Tier2 and DOE Level VI performance requirements for external power supplies.
Features
|
Description
Features
- <10mW no load power
- Primary Side Regulation (PSR) eliminates opto-coupler
- +/- 5% Voltage & Current Regulation
- 100 KHz max switching frequency enables high power density charger designs
- Quasi-resonant valley switching operation for highest overall efficiency
- Wide VDD range (35V) allows small bias (...)
Description
Features
- <10mW no load power
- Primary Side Regulation (PSR) eliminates opto-coupler
- +/- 5% Voltage & Current Regulation
- Quasi-resonant valley switching operation for highest overall efficiency
- Wide VDD range (35V) allows small bias capacitor
- Drive Output for low cost Bipolar
- Protection Functions: Over Voltage, Low (...)
Description
The UCC28740EVM-525 evaluation module is a 10W off-line discontinuous mode (DCM) flyback converter that provides constant-voltage (CV) and constant-current (CC) output regulation. It uses optical coupler feedback for tight voltage regulation and improved the transient response to large load steps (...)
Features
- Universal AC input, 5V/2.1A output
- <20mW no load power
- Avg. efficiency > 80%
- Opto-Coupled Feedback for Constant Voltage Regulation and Fast Dynamic Response
- Primary Side Control for Tight Constant Current Performance (± 5% Output Current Regulation)
- Internal 700V Start-Up Switch to Start up the Supply (...)
Design tools & simulation
Reference designs
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 7 | View options |
Ordering & quality
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- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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