Datasheet Texas Instruments UCC38503DWTR — Datenblatt
| Hersteller | Texas Instruments |
| Serie | UCC38503 |
| Artikelnummer | UCC38503DWTR |
BiCMOS PFC / PWM-Kombinationsregler 20-SOIC 0 bis 70
Datenblätter
BiCMOS PFC/PWM Combination Controller datasheet
PDF, 1.1 Mb, Revision: C, Datei veröffentlicht: Nov 8, 2001
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Preise
Status
| Lifecycle Status | Active (Recommended for new designs) |
| Manufacture's Sample Availability | No |
Verpackung
| Pin | 20 |
| Package Type | DW |
| Industry STD Term | SOIC |
| JEDEC Code | R-PDSO-G |
| Package QTY | 2000 |
| Carrier | LARGE T&R |
| Device Marking | UCC38503DW |
| Width (mm) | 7.5 |
| Length (mm) | 12.8 |
| Thickness (mm) | 2.35 |
| Pitch (mm) | 1.27 |
| Max Height (mm) | 2.65 |
| Mechanical Data | Herunterladen |
Parameter
| Control Method | CCM |
| Device Type | PFC+PWM |
| Operating Supply Current | 4 mA |
| Operating Supply(Max) | 18 V |
| Operating Temperature Range | 0 to 70 C |
| Package Group | SOIC |
| Package Size: mm2:W x L | 20SOIC: 132 mm2: 10.3 x 12.8(SOIC) PKG |
| Peak Output Sink Current Gate Drive | 1.2 A |
| Peak Output Source Current Gate Drive | -1.2 A |
| Practical Operating Frequency(Max) | 0.2 MHz |
| Rating | Catalog |
| Special Features | < 150W Applications,Average Current Mode,Enable,OVP |
| Startup Current | 0.15 mA |
| UVLO Thresholds On/Off | 10.5/10 V |
Öko-Plan
| RoHS | Compliant |
Anwendungshinweise
- A New Synchronization Circuit for Power Converters (Rev. A)PDF, 209 Kb, Revision: A, Datei veröffentlicht: Apr 21, 2010
The synchronization of multiple PWM and PFC controllers is desirable for many reasons. The most common reason is that it keeps all the noise at one particular frequency and makes it easier to filter. The circuit described changes the slope of the ramp to lock the converter’s switching frequency to an applied signal by a phase locked loop turning it into a voltage controlled oscillator. Furthermore - Startup Current transient of the Leading Edge Triggered PFC ControllersPDF, 43 Kb, Datei veröffentlicht: Jun 30, 2004
- Avoiding Audible Noise at Light Loads When Using Leading Edge Triggered PFC Con (Rev. C)PDF, 57 Kb, Revision: C, Datei veröffentlicht: Apr 13, 2011
This application note applies to the TI average current mode, leading edge modulation PFC controllers. See Applicable Device Table for part numbers. - DN-66 UC3854A/B and UC3855A/B Provide Power Limiting with Sinusoidal Input (Rev. A)PDF, 80 Kb, Revision: A, Datei veröffentlicht: Nov 6, 2001
- Accurate PWM Duty Cycle ClampPDF, 58 Kb, Datei veröffentlicht: Jan 25, 2002
Power supply applications using current sense transformers require a duty cycle clamp on the pulse width modulator (PWM) to ensure transformer reset. Not all PWMs come with a duty cycle clamp presenting a problem for the power supply designer. This application note shows how to implement a duty cycle clamp by using a simple delay circuit.
Modellreihe
Serie: UCC38503 (4)
- UCC38503DW UCC38503DWG4 UCC38503DWTR UCC38503DWTRG4
Herstellerklassifikation
- Semiconductors > Power Management > Offline and Isolated DC/DC Controllers and Converters > Power Factor Correction