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Overview
| Topology | Flyback Converter |
| Input voltage | 85-265 V |
| Output 1 | 20 V / 3.25 A |
| IC revision | C |
Description
This reference design is a low-cost, high-density USB adapter that uses the UCC28782 active-clamp flyback controller and UCC5304 isolated driver in a ZVS-flyback topology. The maximum power rating is 65 W at 20-V output but is adjustable for 20-V/15-V/9-V/5-V output voltages and 3 A. This design reaches a peak efficiency of 93.4%. The average efficiency and standby power levels are designed to meet DoE level VI and CoC Tier 2 limits. The compact design has dimensions of 44 mm by 54 mm by 20mm (48cc open frame).
Features
- Compact size of 44 mm by 54mm by 20 mm (48 cc open frame)
- High efficiency, 93.4% peak
- EMI data provided in test report, below CISPR32 limits
- Supports variable output voltage 5 V to 20 V
- Designed to meet efficiency and standby requirements of DoE Level VI and CoC Tier 2
Typical applications
- Notebook PC power adapter design
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | (nF) | (V (AC)) | (V/µs) | (%) | (GΩ) | (mm) | (mm) | (mm) | (mm) | (mm) | (V (DC)) | (µH) | (A) | (Ω) | Samples | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 890324024003 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-FTX2 Film Capacitors | Across the mains | 330 | 275 | X2 | 260 | 0.1 | 30 | 12.5 | 15 | 8.5 | 14 | Bulk | – | – | – | – | Boxed THT | – | – | – | – | – | ||
 | 632723300011 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-USB Type C Connectors | USB 3.1 | – | – | – | – | – | 1 | – | – | – | – | Tape and Reel | Type C | Horizontal | Receptacle | 24 | THR | 1.6 | 48 | – | 5 | – | |
 | 7447052 | SPEC | – | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-FI Leaded Toroidal Line Choke | – | – | – | – | – | – | – | – | 10 | 6.6 | – | – | – | – | – | – | THT | – | – | 32 | 2.6 | 0.045 |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 890324024003 | SPEC | |
| 632723300011 | SPEC | – |
| 7447052 | SPEC | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | (nF) | (V (AC)) | (V/µs) | (%) | (GΩ) | (mm) | (mm) | (mm) | (mm) | (mm) | (V (DC)) | (µH) | (A) | (Ω) | Samples |
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