參數(shù)資料
型號(hào): NCP1239
廠商: ON SEMICONDUCTOR
英文描述: Low−Standby High Performance PWM Controller
文件頁數(shù): 14/38頁
文件大?。?/td> 1145K
代理商: NCP1239
NCP1239
http://onsemi.com
14
Figure 33. Fault Management
10ms* Jittering
100ms*
fmax
fmin
0.9 V
Error flag
16.4V
11.2V
Fb is ok
Fault occurs here
6.9V
OVL signal
(OverLoad)
DRV
Vcc
Reset at UVLO
Fault not confirmed
PFC off
PFC on
1.8V
3.0V
4.3V
PFC off
100ms*
Fault confirmed
New Startup
attempt
S
0.9 V
Error flag
0.9 V
Error flag
Fault Management
*This time is programmed by the Pin 6 capacitor. C
pin6
= 390 nF nearly sets the following intervals:
SoftStart Time (T
ss
):7.5 ms
Jittering Period (T
jittering
): 10 ms
Fault Detection Delay (T
delay
): 100 ms
More generally, the times approximately depend on C
pin6
as follows:
T
ss
= 7.5 ms * C
/ 390 nF
T
jittering
=10 ms * C
pin6
/ 390 nF
T
delay
=100 ms * C
pin6
/ 390 nF
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