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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 | 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 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 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 PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LF Common Mode Power Line Choke | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 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 | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-ATG8 Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 100 µF | – | – | – | – | 2.5 | Ammopack | ±20% | – | 14 | – | – | – | – | 2000 | 209 | 25 | 6.3 | – | – | – | – | – | – | – | – | – | 25 | – | – | 11 | – | – | – | ||
 | 860021380017 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-ATG5 Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 68 µF | – | – | – | – | 7.5 | Ammopack | ±20% | – | 15 | – | – | – | – | 2000 | 410 | 816 | 16 | – | – | – | – | – | – | – | – | – | 400 | – | – | 25 | – | – | – | ||
 | 860040475009 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-ATUL Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | 680 µF | – | – | – | – | 5 | Ammopack | ±20% | – | 14 | – | – | – | – | 7000 | 1400 | 170 | 10 | – | – | – | – | – | – | – | – | – | 25 | – | – | 20 | – | – | – | ||
 | 885012006057 | SPEC | 9 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 | 9 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 | 9 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 | 9 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 | 8 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 | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSMH Mid and High Voltage | – | – | – | – | – | – | – | 1 nF | – | – | – | 10 GΩ | – | 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 | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-FTBE Film Capacitors | – | – | – | – | – | – | – | 100 nF | 800 | 44 | 1 | 9 GΩ | 15 | Carton | ±10% | Pitch 15 mm | – | – | – | -40 °C up to +85 °C | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1000 | – | – | 18 | 8.5 | 15 | – | ||
| 885012108022 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | 10 µF | – | – | – | 0.005 GΩ | – | 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 | 8 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 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 150120GS75000 | SPEC | |
| 74279205 | SPEC | |
| 7446121007 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 860010473007 | SPEC | |
| 860021380017 | SPEC | |
| 860040475009 | SPEC | |
| 885012006057 | SPEC | |
| 885012206085 | SPEC | |
| 885012206093 | SPEC | |
| 885012206095 | SPEC | |
| 885012107018 | SPEC | |
| 885342207008 | SPEC | |
| 890493425009CS | SPEC | |
| 885012108022 | SPEC | |
| 885012109015 | SPEC | |
| 750320029 | SPEC | – |
| Samples |
|---|
| 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 | 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 |
|---|
