參數(shù)資料
型號(hào): FSDM0465RB
廠商: Fairchild Semiconductor Corporation
英文描述: Green Mode Fairchild Power Switch (FPS)
中文描述: 綠色模式飛兆半導(dǎo)體功率開關(guān)(FPS)
文件頁數(shù): 12/18頁
文件大?。?/td> 250K
代理商: FSDM0465RB
FSDM0465RB
12
5. Burst Operation:
To minimize power dissipation in
standby mode, the FSDM0465RB enters burst mode
operation. As the load decreases, the feedback voltage
decreases. As shown in Figure 8, the device automatically
enters burst mode when the feedback voltage drops below
V
BURL
(500mV). At this point switching stops and the
output voltages start to drop at a rate dependent on the
standby current load. This causes the feedback voltage to
rise. Once it passes V
BURH
(700mV), switching resumes.
The feedback voltage then falls and the process repeats.
Burst mode operation alternately enables and disables
switching of the power SenseFET thereby reducing
switching loss in Standby mode.
Figure 8. Waveforms of Burst Operation
V
FB
Vds
0.5V
0.7V
Ids
Vo
Vo
set
time
Disabled
T1
T2 T3
Disabled
T4
Switching
Switching
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