參數(shù)資料
型號: NCP1395A
廠商: ON SEMICONDUCTOR
英文描述: High Performance Resonant Mode Controller(高性能諧振模式控制器)
中文描述: 高性能諧振模式控制器(高性能諧振模式控制器)
文件頁數(shù): 20/27頁
文件大小: 335K
代理商: NCP1395A
NCP1395A/B
http://onsemi.com
20
1
vct
2
clock
5
difference
0
1.00
2.00
3.00
4.00
v
p
1
0
4.00
8.00
12.0
16.0
c
p
2
56.2u
65.9u
75.7u
85.4u
95.1u
time in seconds
8.00
4.00
0
4.00
8.00
d
P
5
Figure 44. Typical Oscillator Waveforms
BrownOut Protection
The BrownOut circuitry (BO) offers a way to protect the
resonant converter from low DC input voltages. Below a
given level, the controller blocks the output pulses, above
it, it authorizes them. The internal circuitry, depicted by
Figure 42, offers a possibility to observe the highvoltage
(HV) rail. A resistive divider made of Rupper and Rlower,
brings a portion of the HV rail on pin 7. Below the turnon
level, a current source IBO is off. Therefore, the turnon
level solely depends on the division ratio brought by the
resistive divider.
1
vin
2
vcmp
20.0u
60.0u
100u
140u
180u
time in seconds
0
4.00
8.00
12.0
16.0
v
50.0
150
250
350
450
v
P
1
2
250 volts
351 volts
Vin
BO
Figure 45. The Internal BrownOut
Configuration with an Offset Current Source
Vdd
+
VBO
+
ON/OFF
IBO
BO
Vbulk
Rupper
Rlower
BO
Figure 46. Simulation Results for 350/250 ON/OFF Levels
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