- 您现在的位置：买卖IC网 > PDF目录19701 > NCP1203D40R2G (ON Semiconductor)IC CTRLR PWM CM UVLO HV 8SOIC PDF资料下载
参数资料
| 型号： | NCP1203D40R2G |
| 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： | 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
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
相关PDF资料 |
PDF描述 |
|---|---|
| ACM28DTAN | CONN EDGECARD 56POS R/A .156 SLD |
| TAJR225M006RNJ | CAP TANT 2.2UF 6.3V 20% 0805 |
| VI-253-CY-F3 | CONVERTER MOD DC/DC 24V 50W |
| LC4256V-3T176C | IC PLD 256MC 128I/O 3NS 176TQFP |
| ECC05DJBN | CONN EDGECARD 10POS .100X.200 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| NCP1203D60R2G | 制造商:ON Semiconductor 功能描述:Pulse Width Modulation (PWM) Controller |
| NCP1203D60R2G-CUT TAPE | 制造商:ON 功能描述:NCP1203 Series 16 V 73 kHz Surface Mount PWM Current-Mode Controller- SOIC-8 |
| NCP1203GEVB | 功能描述:电源管理IC开发工具 NCP1203 70W EVB ADAPTER EVB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
发布紧急采购，3分钟左右您将得到回复。