Texas Instruments UCC28061 300W PFC Pre-Regulator Evaluation Module UCC28061EVM UCC28061EVM 데이터 시트
제품 코드
UCC28061EVM
6.3
Startup Characteristics
6.4
Brownout Protection
V
OUT
Rectified Line Voltage After the Bridge Rectifier
GDA
GDB
C3
15.2V
15.2V
PP
C3
9.67V
9.67V
RMS
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Typical Performance Data
and
illustrate the UCC28061EVM startup characteristics.
Figure 15. Start-Up at V
IN
= 85 V
RMS
,
Figure 16. Start-Up at V
IN
= 265 V
RMS
,
P
OUT
= 300 W
P
OUT
= 0 W
The UCC28061 has a brownout protection that shuts down both gate drives (GDA and GDB) when the
VINAC pin detects that the RMS input voltage is too low. This EVM was designed to go into a brownout
state when the line drops below 64 V
VINAC pin detects that the RMS input voltage is too low. This EVM was designed to go into a brownout
state when the line drops below 64 V
RMS
. Once the UCC28061 control device has determined that the
input is in a brownout condition, a 400-ms timer starts to allow the line to recover before shutting down the
gate drivers. After 400 ms of brownout, both gate drivers turn off, as shown in
gate drivers. After 400 ms of brownout, both gate drivers turn off, as shown in
and
Figure 17. Brownout at 85 V
RMS
Figure 18. Brownout at 265 V
RMS
SLUU316 – August 2008
UCC28061EVM 300-W Interleaved PFC Pre-Regulator
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