TEST REPORT
Isolated Active Clamp Forward Converter(19-V, 4-A to 40-V, 2.5-A) Reference Design
Description
This reference design utilizes an active clamp-forward converter for an 18-V to 36-V DC input to isolated output adjustable from 40 V, 2.5 A to 19 V, 4 A. A UCC2897A PWM controller provides the control for the active clamp-forward converter.
Features
- Nominal 24-V DC input for industrial applications
- Adjustable output from 19 V to 40 V
- 88% efficiency at 19-V, 4-A; 91% efficiency at 40 V, 2.5 A
Applications
Top Board
Photo
Bottom Board
Photo1 Test Prerequisites
1.1 Voltage and Current Requirements
Table 1-1 Voltage and Current Requirements
| Parameter | Specifications |
|---|---|
| Input voltage | 18 V to 36 V DC |
| Output voltage | Adjustable, 19 V to 40 V ±3% |
| Output current | 4 A maximum at 19-V output 2.5 A maximum at 40-V output |
| Output power | 100-W continuous from 30-V to 40-V output; below 30-V output, derate linearly to 76 W at 19-V output |
| Switching frequency | 200 kHz |
