EVBUM2822/D
7
Soft
−
Start
Figure 9. Soft
−
Start
Ch. 1 (
Yellow
): Line Current
Ch. 2 (
Blue
): Polarity
Ch. 3 (
Purple
): PFCOK
Ch. 4 (
Green
): Bulk Voltage
Load Transient
Figure 10. Load Transient
10% to 100% Load Step
100% to 10% Load Step
In the above waveforms, NCP1680’s dynamic response enhancer (DRE) limits the lower bulk voltage to 367 V while the
output overvoltage protection (OVP) limits the upper bulk voltage to 418 V. Transient data was captured at 115 Vac.
Ch. 1 (
Yellow
): Line Current
Ch. 2 (
Blue
): PWML
Ch. 3 (
Purple
): PWMH
Ch. 4 (
Green
): Bulk Voltage
Summary of Contents for NCP1680
Page 12: ...EVBUM2822 D www onsemi com 12 MOTHERBOARD PCB ARTWORK Figure 17 Motherboard PCB Part 1 3...
Page 15: ...EVBUM2822 D www onsemi com 15 DAUGHTERBOARD PCB ARTWORK Figure 20 Daughterboard PCB Part 1 2...
Page 17: ...EVBUM2822 D www onsemi com 17 TRANSFORMER DATA SHEET Figure 22 Transformer Data Sheet...
Page 19: ...EVBUM2822 D www onsemi com 19 Daughter Card Figure 25 Daughter Card...
