参数资料
型号: NCP1203D100R2G
厂商: ON Semiconductor
文件页数: 12/15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: 90kHz ~ 115kHz
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: 标准包装
其它名称: NCP1203D100R2GOSDKR
NCP1203
Figure 21. A negative spike takes place on the Bulk capacitor at the switch ? off sequence
Simple and inexpensive cures exist to prevent from
internal parasitic SCR activation. One of them consists in
inserting a resistor in series with the high ? voltage pin to
keep the negative current to the lowest when the bulk
becomes negative (Figure 22). Please note that the negative
spike is clamped to –2 x Vf due to the diode bridge. Also, the
power dissipation of this resistor is extremely small since it
only heats up during the startup sequence.
Rbulk
> 4.7 k
Another option (Figure 23) consists in wiring a diode from
V CC to the bulk capacitor to force V CC to reach UVLOlow
sooner and thus stops the switching activity before the bulk
capacitor gets deeply discharged. For security reasons, two
diodes can be connected in series.
+
Cbulk
1
2
3
4
8
7
6
5
+
CV CC
+
Cbulk
1
2
3
4
8
7
6
5
D3
1N4007
+
CV CC
Figure 22. A simple resistor in series avoids any
latchup in the controller
Figure 23. or a diode forces V CC to reach
UVLOlow sooner
http://onsemi.com
12
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相关代理商/技术参数
参数描述
NCP1203D100R2G 制造商:ON Semiconductor 功能描述:Power Supply IC
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NCP1203D40R2G 功能描述:电流型 PWM 控制器 40KHz Current Mode SMPS PWM RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
NCP1203D60R2 功能描述:电流型 PWM 控制器 60KHz Current Mode RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
NCP1203D60R2G 功能描述:电流型 PWM 控制器 60KHz Current Mode SMPS PWM RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14