参数资料
| 型号： | NCP1308DR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBACK PWM 8-SOIC |
| 标准包装： | 1 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 75kHz |
| 电源电压： | 11 V ~ 20 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 125°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 剪切带 (CT) |
| 其它名称： | NCP1308DR2GOSCT |
NCP1308
Protecting Pin 8 Against Negative Spikes
As any CMOS controller, NCP1308 is sensitive to
negative voltages that could appear on its pins (Figure 23).
To avoid any adverse latchup of the IC, we strongly
recommend to insert a resistor in series with pin 8. This
Vbulk
resistor prevents from adversely latching the controller in
case of negative spikes appearing on the bulk capacitor
during the power-off sequence. Please refer to the power
dissipation section of this data sheet to see how to calculate
this element.
Latch!
Vcc
Vbulk
<0
Figure 23. A negative spike can occur at mains switch-off if the
quality coefficient of Cbulk-Lp is high enough.
Another option consists in adding a diode (or two in
series for safety) from the V CC to the bulk capacitor.
Figure 12 details this other option:
1
8
1N4007
1N4007
+
Cbulk
2
3
7
6
or
1N4007
4
5
+
CVCC
Figure 24. A diode will force the V CC to decrease at
the same pace the bulk capacitor does, avoiding a
negative ringing on the HV pin.
http://onsemi.com
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相关代理商/技术参数 |
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| NCP1316 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| NCP1336 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Quasi-Resonant Current Mode Controller for High Power Universal Off-Line Supplies |
| NCP1336A | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Quasi-Resonant Current Mode Controller for High Power Universal Off-Line Supplies |
| NCP1336ADR2G | 功能描述:电流型 PWM 控制器 QUASI-RES CUR MODE CONTRL 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 |
| NCP1336B | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Quasi-Resonant Current Mode Controller for High Power Universal Off-Line Supplies |
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