参数资料
型号: NCP1216AP133G
厂商: ON Semiconductor
文件页数: 15/18页
文件大小: 0K
描述: IC CTRLR PWM CM OTP HV 8DIP
标准包装: 50
输出隔离: 隔离
频率范围: 120kHz ~ 146kHz
输入电压: 11 V ~ 16 V
工作温度: 0°C ~ 125°C
封装/外壳: 8-DIP(0.300",7.62mm),7 引线
供应商设备封装: 7-PDIP
包装: 管件
NCP1216, NCP1216A
+
C bulk
R bulk
> 4.7 k
+
C bulk
1
2
3
8
7
6
1
2
3
8
7
6
D3
1N4007
4
5
+
CV CC
4
5
+
CV CC
Figure 27.
A simple resistor in series avoids any latchup in the controller
or one diode forces V CC to reach V CCON sooner.
Figure 28.
Soft ? Start ? NCP1216A only
The NCP1216A features an internal 1.0 ms soft ? start
activated during the power on sequence (PON). As soon as
V CC reaches V CCOFF , the peak current is gradually
increased from nearly zero up to the maximum clamping
level (e.g. 1.0 V). This situation lasts during 1ms and further
to that time period, the peak current limit is blocked to
activated during the over current burst (OCP) sequence.
Every restart attempt is followed by a soft ? start activation.
Generally speaking, the soft ? start will be activated when
V CC ramps up either from zero (fresh power ? on sequence)
or 5.6 V, the latchoff voltage occurring during OCP.
Figure 29 portrays the soft ? start behavior. The time scales
are purposely shifted to offer a better zoom portion.
1.0 V until the supply enters regulation. The soft ? start is also
Figure 29. Soft ? start is activated during a startup sequence or an OCP condition
http://onsemi.com
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