ncp1395 ON Semiconductor, ncp1395 Datasheet - Page 17

• Manufacturer Part Number: ncp1395
• Description: High Performance Resonant Mode Controller
• Manufacturer: ON Semiconductor

and deadtime) requires the usage of the selection charts
displayed below:
1100
900
700
500
300
100
200
180
160
140
120
100
The selection of the three setting resistors (Fmax, Fmin
Figure 38. Minimum Switching Frequency Resistor
Figure 37. Maximum switching frequency resistor
80
60
40
selection depending on the adopted minimum
20
20
70
40
switching frequency.
120
Selection
60
RFmax (kW)
RFmin (kW)
170
Fmin = 50 kHz
220
80
270
Fmin = 200 kHz
V
FB = 6.5 V
DT = 300 ns
V
FB = 1 V
DT = 300 ns
CC
CC
100
= 11 V
320
= 11 V
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NCP1395A/B
370
120
17
ORing Capability
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
reaction to a fault event or to regulate on the output current
(CC operation). Figure 40 shows how to do it.
1000
1100
900
800
700
600
500
400
300
200
100
If for a particular reason, there is a need for having a
Figure 40. Due to the FB configuration, loop ORing
0
0
Figure 39. Dead−Time Resistor Selection
V
In1
In2
CC
100
= 11 V
is easy to implement.
200
V
CC
Rdt (kW)
FB
300
20 k
400
VCO
500
600