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Texas Instruments UCC28742 | Demoboard TIDA-010239
High-Efficiency Flyback Controller with 1% Output regulation accuracy
Overview
| Topology | Flyback Converter |
| Input voltage | 85-460 V |
| Switching frequency | 200-80 kHz |
| Output 1 | 14 V |
| Output 2 | -14 V |
| Output 3 | 12 V / 2.2 A |
| IC revision | C |
Description
The UCC28742 off-line flyback controller is a highly integrated, 6-pin secondary-side regulated PWM controller for efficient AC-to-DC power supplies. It is an isolated-flyback power-supply controller that provides Constant-Voltage (CV) using an optical coupler to improve transient response to large-load steps. This device processes information from opto-coupled feedback and an auxiliary flyback winding for high-performance control of output voltage and current.The UCC28742 employs advanced control algorithms to achieve high operating efficiency and performance. 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 80 kHz and always maintains control of the peak-primary current in the transformer. A minimum switching frequency of 200 Hz facilitates the achievement of low no-load input power.This EVM includes an on-board MSP430, MSP430FR2355, which is used to interface with the MCT8316ZTEVM GUI.
Features
Opto-Coupled Feedback Enables up to 1% RegulationAccurate Current Limit with Overload Timeout Protection and Delayed Hiccup ResponseResonant-Ring Valley-Switching Operation for Highest Overall Efficiency80-kHz Maximum Switching FrequencyFrequency Dithering to Ease EMI ComplianceClamped Gate-Drive Output for MOSFETUltra-Low Start-Up Current and Large VDD HysteresisHigh Value Start-Up ResistorLow Bias CapacitanceFault ProtectionsInput Low LineOutput Over-VoltageOver-CurrentShort-CircuitSOT23-6 PackageCreate a Custom Design Using the UCC28742 with the WEBENCH® Power DesignerSupercapacitor backup supplying up to 7.5 W for three seconds during energy storage release (AC mains failing)DRV8220 current controller to drive high-current relays and contactors for thermal protection, RCD AC and DC detection, and plug lock controlIsolated line voltage sensing using the ISO1212 digital-input receiver for welded relay and contactor detectionTight output voltage regulation (< ±5%) of LDOs and the high slew rate of the TLV1805 device for control pilot interface
Typical applications
- L1 Residential Chargers
- EV charging station power module
- L2 Commercial Chargers
- DC fast charging station
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | VR 2 (V (DC)) | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | Tol. C | Size | DF (%) | Ceramic Type | Fl (mm) | Operating Temperature | Q | Endurance (h) | IRIPPLE (mA) | ILeak (µA) | Ø D (mm) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | IR (mA) | L1 (mH) | RDC max. (Ω) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 150120GS75000 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WL-SMCW SMT Mono-color Chip LED Waterclear | 525 | Green | 515 | 450 | 3.2 | InGaN | 140 | – | – | – | – | – | – | – | Tape and Reel | – | 1206 | – | – | – | -40 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 3.2 | 1.6 | 0.68 | SMT | ||
 | 74279205 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | – | – | 0805 | – | – | 0.5 | -55 °C up to +125 °C | – | – | – | – | – | 1000 | 1050 | 150 MHz | 900 | 0.45 | Wide Band | 200 | – | 0.45 | – | – | – | 2 | 1.2 | 0.9 | SMT | ||
 | 7446121007 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LF Common Mode Power Line Choke | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | – | – | SV | – | – | – | -40 °C up to +125 °C | – | – | – | – | – | – | – | – | – | 0.3 | – | 1000 | 6.8 | 0.3 | 250 | 1500 | MnZn | 18.5 | 13.5 | 20.5 | THT | ||
 | 860010473007 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-ATG8 Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 100 µF | – | – | – | – | -40 °C up to +85 °C | 2.5 | Ammopack | ±20% | – | 14 | – | – | – | – | 2000 | 209 | 25 | 6.3 | – | – | – | – | – | – | – | – | – | 25 | – | – | 11 | – | – | – | ||
 | 860021380017 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-ATG5 Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 68 µF | – | – | – | – | -25 °C up to +105 °C | 7.5 | Ammopack | ±20% | – | 15 | – | – | – | – | 2000 | 410 | 816 | 16 | – | – | – | – | – | – | – | – | – | 400 | – | – | 25 | – | – | – | ||
 | 860040475009 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-ATUL Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 680 µF | – | – | – | – | -40 °C up to +105 °C | 5 | Ammopack | ±20% | – | 14 | – | – | – | – | 7000 | 1400 | 170 | 10 | – | – | – | – | – | – | – | – | – | 25 | – | – | 20 | – | – | – | ||
 | 885012006057 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | 100 pF | – | – | – | 10 GΩ | – | – | 7" Tape & Reel | ±5% | 0603 | – | NP0 Class I | 0.4 | -55 °C up to +125 °C | 1000 | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 1.6 | 0.8 | 0.8 | – | ||
| 885012206085 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | 2.2 nF | – | – | – | 10 GΩ | – | – | 7" Tape & Reel | ±10% | 0603 | 2.5 | X7R Class II | 0.4 | -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 1.6 | 0.8 | 0.8 | – | ||
| 885012206093 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | 47 nF | – | – | – | 10 GΩ | – | – | 7" Tape & Reel | ±10% | 0603 | 3 | X7R Class II | 0.4 | -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 1.6 | 0.8 | 0.8 | – | ||
| 885012206095 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | 100 nF | – | – | – | 5 GΩ | – | – | 7" Tape & Reel | ±10% | 0603 | 3 | X7R Class II | 0.4 | -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 1.6 | 0.8 | 0.8 | – | ||
| 885012107018 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | 4.7 µF | – | – | – | 0.02 GΩ | – | – | 7" Tape & Reel | ±20% | 0805 | 10 | X5R Class II | 0.5 | -55 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 25 | – | – | 2 | 1.25 | 1.25 | – | ||
 | 885342207008 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSMH Mid and High Voltage | – | – | – | – | – | – | – | 1 nF | – | – | – | 10 GΩ | -55 °C up to +125 °C | – | 7" Tape & Reel | ±10% | 0805 | 2.5 | X7R Class II | 0.5 | -55 °C up to +125 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 250 | – | – | 2 | 1.25 | 0.8 | – | ||
 | 890493425009CS | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-FTBE Film Capacitors | – | – | – | – | – | – | – | 100 nF | 800 | 44 | 1 | 9 GΩ | -40 °C up to +85 °C | 15 | Carton | ±10% | Pitch 15 mm | – | – | – | -40 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1000 | – | – | 18 | 8.5 | 15 | – | ||
| 885012108022 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | 10 µF | – | – | – | 0.005 GΩ | -55 °C up to +125 °C | – | 7" Tape & Reel | ±10% | 1206 | 10 | X5R Class II | 0.6 | -55 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | 3.2 | 1.6 | 1.6 | – | ||
| 885012109015 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | 22 µF | – | – | – | 0.005 GΩ | – | – | 7" Tape & Reel | ±10% | 1210 | 10 | X5R Class II | 0.6 | -55 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 25 | – | – | 3.2 | 2.5 | 2.5 | – | ||
| 750320029 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Offline Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | VR 2 (V (DC)) | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | Tol. C | Size | DF (%) | Ceramic Type | Fl (mm) | Operating Temperature | Q | Endurance (h) | IRIPPLE (mA) | ILeak (µA) | Ø D (mm) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | IR (mA) | L1 (mH) | RDC max. (Ω) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples |
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