參數(shù)資料
型號: TEA2164
廠商: 意法半導(dǎo)體
英文描述: SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT
中文描述: 開關(guān)電源主回路
文件頁數(shù): 10/15頁
文件大小: 177K
代理商: TEA2164
2
Figure 10 :
RepetitiveOver-current Protection
III. SWITCHING OSCILLATOR AND SYNCHRONIZATION
III.1. Switchingoscillator
WhentheTEA2164 controlcircuitoperatesinburst
mode, the switching frequencyis fixed by the free
frequency oscillator. The period is determined by
two external components C
O
andR
O
.
III.2. Synchronization
When the master-circuit starts to send pulsesboth
Figure 11 :
Free FrequencyRunning
oscillators are not synchonuous.In order to avoid
any erratic conductionof the power transistor, the
first synchronizationpulse will arrive simultanously
with the sawtoothreturnof the TEA2164oscillator.
To get synchronizationthe free frequencymust be
higher than the synchronizationfrequency.
T
O
< T
sync.
< 1.50 T
O
2
2
Figure 12 :
SynchronizationPulse Shaper and Synchronization
TEA2164
10/15
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