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参数资料
| 型号： | NCP1397BDR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 23/27页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR ISO PWM 16-SOIC |
| 标准包装： | 2,500 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 560kHz |
| 占空比： | 52% |
| 电源电压： | 10.3 V ~ 20 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽）15 引线 |
| 包装： | 带卷 (TR) |
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NCP1397A, NCP1397B
SMPS Stops
4V
Fault is Gone
SMPS Re ? starts
1V
Reset at Re ? start
Figure 45. A Resistor Can Easily Program the Capacitor Discharge Time
V CC
FB
Skip/Disable
Figure 46. Skip Cycle Can Be Implemented Via Two
Resistors on the FB Pin to the Fast Fault Input
Skip/Disable
The Skip/Disable input is not affected by a delayed action.
As soon as its voltage exceeds 0.66 V typical, all pulses are
off and maintained off as long as the fault is present. When
the pin is released, pulses come back and the soft ? start is
activated (in case the V FB < 0.3 V).
Thanks to the low activation level, this pin can observe the
feedback pin via a resistive divided and thus implement skip
cycle operation. The resonant converter can be designed to
lose regulation in light load conditions, forcing the FB level
to increase. When it reaches the programmed level, it
triggers the skip input and stops pulses. Then V out slowly
drops, the loop reacts by decreasing the feedback level
which, in turn, unlocks the pulses, V out goes up again and so
on: we are in skip cycle mode. As the feedback voltage does
not drop below 0.3 V the Soft ? Start discharge switch is not
activated in this case. Please refer also to Figure 35 for skip
mode function implementation when optocoupler is
connected directly to Rt pin.
Startup Behavior
When the V CC voltage increases, the internal current
consumption is kept below I strup . When V CC reaches the
V CC(on) level, output Mlower goes high first and then output
Mupper. This sequence will always be the same whatever
triggers the pulse delivery: fault, OFF to ON etc … Pulsing
the output M lower high first gives an immediate charge of the
bootstrap capacitor. Then, the rest of pulses follow,
delivered at the highest switching value, set by the R Fstart
resistor in parallel with R Fmin resistor on Pin 4. The
soft ? start capacitor ensures a smooth frequency decrease to
either the programmed minimum value (in case of fault) or
to a value corresponding to the operating point if the
feedback loop closes first. Figure 47 shows typical signals
evolution at power on.
http://onsemi.com
23
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1397DR2G | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Performance Resonant Mode Controller with Integrated High-Voltage Drivers |
| NCP1398_13 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Performance Resonant Mode Controller with Integrated High-Voltage Drivers |
| NCP1398B | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:High Performance Resonant Mode Controller with Integrated High-Voltage Drivers |
| NCP1398BDR2G | 功能描述:功率驱动器IC HI-PERF RES MODE CTR W/ H RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| NCP1398CDR2G | 制造商:ON Semiconductor 功能描述:HI-PERF RES MODE CTR W/ H - Tape and Reel 制造商:ON Semiconductor 功能描述:REEL / HI-PERF RES MODE CTR W/ H |
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