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参数资料
| 型号： | NCP1397BDR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 15/27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
500
450
400
350
300
250
200
150
V CC = 15 V
V FB = 1 V
DT = 300 ns
ORing capability and optocoupler connection
configurations
If for any particular reason, there is a need for a frequency
variation linked to an event appearance (instead of abruptly
stopping pulses), then the FB pin lends itself very well to the
addition of other sweeping loops. Several diodes can easily
be used perform the job in case of reaction to a fault event
or to regulate on the output current (CC operation).
Figure 33 shows how to do it.
V CC
100
2
4
6
8
10 12
14
16
18
20
Selection (F min = 100 kHz to 500 kHz)
V CC = 15 V
80
R Fmin (k W )
Figure 30. Minimum Switching Frequency Resistor
100
90
V FB = 1 V
DT = 300 ns
In1
In2
FB
20 k
VCO
70
60
50
40
30
20
20 30 40 50 60 70 80 90 100 110
R Fmin (k W )
Figure 31. Minimum Switching Frequency Resistor
Selection (F min = 20 kHz to 100 kHz)
1900
1700
1500
1300
1100
900
700
500
300
Figure 33. Thanks to the FB Configuration, Loop
ORing is Easy to Implement
The VCO configuration used in this IC also offers an easy
way to connect optocoupler (or pulldown bipolar) directly
to the Rt pin instead of FB pin (refer to Figures 34 and 35).
The optocoupler is then configured as “common emitter”
and the operating frequency is controlled by the current that
is taken out from the Rt pin – we have current controller
oscillator (CCO). If one uses this configuration it is needed
to maintain FB pin voltage between 0.3 V and 1 V otherwise
the FB fault will be detected. The FB pin can be still used for
open FB loop detection in some applications – to do so it is
needed to keep optcoupler emitter voltage higher then 0.3 V
for nominal load conditions. One needs to take R FB
pulldown resistor into account when using this
configuration. It is possible to implement skip mode using
Skip/disable input and emitter resistors R skip1 and R skip2 .
100
3.5
13.5
23.5
33.5 43.5 53.5
63.5
73.5 83.5
R DT (k W )
Figure 32. Deadtime Resistor Selection
http://onsemi.com
15
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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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