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参数资料
| 型号： | NCP1203D40R2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 2/15页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM CM UVLO HV 8SOIC |
| 标准包装： | 1 |
| 系列： | SMARTMOS™ |
| 输出隔离： | 隔离 |
| 频率范围： | 37kHz ~ 47kHz |
| 输入电压： | 8.4 V ~ 16 V |
| 输出电压： | 500V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 剪切带 (CT) |
| 其它名称： | NCP1203D40R2GOSCT |
NCP1203
+
*
Aux.
+
V OUT
NCP1203
EMI
FILTER
1
2
3
4
Adj HV
FB
CS V CC
GND Drv
8
7
6
5
UNIVERSAL
INPUT
+
*Please refer to the application information section
Figure 1. Typical Application Example
PIN FUNCTION DESCRIPTION
Pin No.
1
Pin Name
Adj
Function
Adjust the skipping peak current
Pin Description
This pin lets you adjust the level at which the cycle skipping process takes
place. Shorting this pin to ground, permanently disables the skip cycle
feature.
2
FB
Sets the peak current setpoint
By connecting an optocoupler to this pin, the peak current setpoint is
adjusted accordingly to the output power demand. Skip cycle occurs when
FB falls below Vpin1.
3
CS
Current sense input
This pin senses the primary current and routes it to the internal comparator
via an L.E.B.
4
5
6
7
8
GND
Drv
V CC
NC
HV
The IC ground
Driving pulses
Supplies the IC
?
Ensure a clean and lossless
startup sequence
?
The driver ’s output to an external MOSFET.
This pin is connected to an external bulk capacitor of typically 22 m F.
This unconnected pin ensures adequate creepage distance.
Connected to the high ? voltage rail, this pin injects a constant current into
the V CC capacitor during the startup sequence.
http://onsemi.com
2
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