UCC28701
- < 30-mW No-Load Power for 5-Star Rating
- Primary-Side Regulation (PSR) Eliminates Opto-Coupler
- ±5% Voltage and Current Regulation
- 130-kHz Maximum Switching Frequency Enables High-Power
Density Charger Designs - Quasi-Resonant Valley-Switching Operation for Highest
Overall Efficiency - Patent-Pending Frequency-Jitter Scheme to Ease EMI
Compliance - Wide VDD Range Allows Small Bias Capacitor
- Clamped Gate-Drive Output for MOSFET
- Protection Functions: Overvoltage, Low-Line, and
Overcurrent - Programmable Cable Compensation (UCC28700 Only)
- NTC Resistor Interface (UCC28701, UCC28702 and UCC28703
Only) With Fixed Cable Compensation Options - SOT-23 Package
The UCC28700 family of flyback power supply controllers provides 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. Low start-up current, dynamically controlled operating states and a tailored modulation profile support very low standby power without sacrificing start-up time or output transient response.
Control algorithms in the UCC28700 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 130 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 UCC28700 allows the level of cable compensation to be programmed. The UCC28701, UCC28702, and UCC28703 devices allow remote temperature sensing using a Negative Temperature Coefficient (NTC) resistor while providing fixed cable-compensation levels.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
UCC28711EVM-160 — UCC28711 evaluation module
UCC2870x TINA-TI Transient Reference Design
SLUC408 — UCC28700 Excel 97 Design Tool
Supported products & hardware
Products
AC/DC & DC/DC controllers (external FET)
PMP12082 — 3-Phase AC Input, Triple Output Bias Supply Reference Design
TIDA-00182 — Reinforced Isolated IGBT Gate Drive Flyback Power Supply with 8 Outputs Reference Design
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
SOT-23 (DBV) | 6 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
- Fab location
- Assembly location
Support & training
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