参数资料
型号: NCP1395BPG
厂商: ON Semiconductor
文件页数: 17/27页
文件大小: 0K
描述: IC REG CTRLR PWM VM 16-DIP
标准包装: 25
PWM 型: 电压模式
输出数: 2
频率 - 最大: 1.11MHz
占空比: 52%
电源电压: 9.3 V ~ 20 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 16-DIP(0.300",7.62mm)
包装: 管件
NCP1395A/B
The selection of the three setting resistors (Fmax, Fmin
and deadtime) requires the usage of the selection charts
displayed below:
1100
1000
900
V CC = 11 V
1100
900
700
V CC = 11 V
FB = 6.5 V
DT = 300 ns
800
700
600
500
400
300
200
500
Fmin = 200 kHz
100
0
0
100
200
300
400
500
600
300
Rdt (k W )
100
20
70
120
170
Fmin = 50 kHz
220 270
320
370
Figure 39. Dead ? Time Resistor Selection
RFmax (k W )
Figure 37. Maximum switching frequency resistor
selection depending on the adopted minimum
switching frequency.
ORing Capability
If for a particular reason, there is a need for having 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 to perform the job in case of
200
180
160
140
120
V CC = 11 V
FB = 1 V
DT = 300 ns
reaction to a fault event or to regulate on the output current
(CC operation). Figure 40 shows how to do it.
V CC
100
80
60
In1
In2
FB
20 k
VCO
40
20
40
60
80
100
120
RFmin (k W )
Figure 38. Minimum Switching Frequency Resistor
Figure 40. Due to the FB configuration, loop ORing
is easy to implement.
Selection
http://onsemi.com
17
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