參數(shù)資料
型號(hào): TEA2164
廠商: 意法半導(dǎo)體
英文描述: SWITCH MODE POWER SUPPLY PRIMARY CIRCUIT
中文描述: 開(kāi)關(guān)電源主回路
文件頁(yè)數(shù): 9/15頁(yè)
文件大?。?/td> 177K
代理商: TEA2164
output conductionsignals are inhibited. The cir-
cuitwill sendbasedrivesagainaftercapacitorC1
discharge (Figure7).
- Long durationoverloadprotection: (Figure 8)
An overload is detected when the sense-voltage
on Pin 11 reachesV
CM3
before a negativepulse
has beenappliedto Pin 6. In thiscasethecapaci-
tor C2 (connected to Pin3) is chargedwith I
3
ch
up to the end of the periodanddischarged with I
3
disch until a next V
CM3
detector. By this way in
case of long duration overload, the capacitor
Figure 7 :
OvervoltagesLock-out
keeps charging at each period and its voltage
encreasesgradually. When the voltageon Pin 3
exceeds V
C2
, the TEA2164 control circuit stops
sending base drives and memorizes this event.
No restart is allowed as long as V
pin 3
is higher
than V
C2
andV
CC
higherthan 4.8V.
* Remark:
- The harder is the overload the faster is the pro-
tection
- The capacitorkeeps chargingbetween two burst
afterV
CM2
detection.
2
2
Figure 8 :
LongDuration Overload Monitoring Circuit
2
Figure 9 :
LongDuration Overload Detection
TEA2164
9/15
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