参数资料
型号: NCP1395BPG
厂商: ON Semiconductor
文件页数: 24/27页
文件大小: 0K
描述: IC REG CTRLR PWM VM 16-DIP
标准包装: 25
PWM 型: 电压模式
输出数: 2
频率 - 最大: 1.11MHz
占空比: 52%
电源电压: 9.3 V ~ 20 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 16-DIP(0.300",7.62mm)
包装: 管件
NCP1395A/B
VCC ON
VCC (min)
SS
Vcc from an auxiliary supply
FB
T SS
Fault!
T SS
0.6V
A&B
Timer
4V
A
B
A
B
Slopes are similar
1V
Figure 51. At power on, output A is first activated and the frequency slowly
decreases via the soft ? start capacitor.
Figure 51 depicts an auto ? recovery situation, where the
timer has triggered the end of output pulses. In that case, the
V CC level was given by an auxiliary power supply, hence
its stability during the hiccup. A similar situation can arise
if the user selects a more traditional startup method,
with an auxiliary winding. In that case, the VCC (min)
comparator stops the output pulses whenever it is activated,
that is to say, when V CC falls below 10.3 V typical. At this
time, the V CC pin still receives its bias current from the
startup resistor and heads toward VCC ON via the Vcc
capacitor. When the voltage reaches VCC ON , a standard
sequence takes place, involving a soft ? start. Figure 52
portrays this behavior.
http://onsemi.com
24
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