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参数资料
| 型号： | NCP1271P100G |
| 厂商： | ON Semiconductor |
| 文件页数： | 17/21页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM CM OVP OTP HV 7DIP |
| 标准包装： | 1,000 |
| 系列： | Soft-Skip™ |
| 输出隔离： | 隔离 |
| 频率范围： | 85kHz ~ 107kHz |
| 输入电压： | 10 V ~ 20 V |
| 工作温度： | -40°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 |
NCP1271
V FB
Fault operation when staying
in this region longer than 130 ms
time of 30 ns and 20 ns with a 1.0 nF load. This allows the
NCP1271 to drive a high ? current power MOSFET directly
for medium ? high power application.
3V
PWM operation
Noise Decoupling Capacitors
There are three pins in the NCP1271 that may need
external decoupling capacitors.
V skip
0V
Non ? latched shutdown
1. Skip/Latch Pin (Pin 1) – If the voltage on
this pin is above 8.0 V, then the circuit enters
latchoff. Hence, a decoupling capacitor on this
Figure 40. NCP1271 Operation Threshold
pin is essential for improved noise immunity.
Additionally, a resistor should always be placed
from this pin to GND to prevent noise from
1
2
8
causing the pin 1 level to exceed the latchoff
level.
OFF
3
4
6
5
2. Feedback Pin (Pin 2) – The FB pin is a high
impedance point and is very easily polluted in a
opto
coupler
Figure 41. Non ? Latchoff Shutdown
NCP1271
noisy environment. This could effect the circuit
operation.
3. V CC Pin (Pin 6) – The circuit maintains normal
operation when V CC is above V CC(off) (9.1 V
typical). But, if V CC drops below V CC(off) because
of switching noise, then the circuit can incorrectly
Output Drive
The output stage of the device is designed to directly
drive a power MOSFET. It is capable of up to +500 mA and
? 800 mA peak drive currents and has a typical rise and fall
http://onsemi.com
17
recognize it as a fault condition. Hence, it is
important to locate the V CC capacitor or an
additional decoupling capacitor as close as possible
to the device.
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| NCP1271P65G | 功能描述:电流型 PWM 控制器 ANA PMW CONTROLLER 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 |
| NCP1271开关电源控制器 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| NCP1280 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Active Clamp Voltage Mode PWM Controller for Off-Line Applications |
| NCP1280/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Active Clamp Voltage Mode PWM Controller For Off-Line Applications |
| NCP1280_05 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Active Clamp Voltage Mode PWM Controller for Off-Line Applications |
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