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參數(shù)資料
| 型號： | UC284XA |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER |
| 中文描述： | 高性能電流模式PWM控制器 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 171K |
| 代理商： | UC284XA |
5/16
UC384XA - UC284XA
Figure 4. Open Loop Test Circuit.
High peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and
bypass capacitors should be connected close to pin 5 in a single point ground. The transistor and 5 K
potentiometer are used to sample the oscillator waveform and apply an adjustable ramp to pin 3.
R
T
A
2N2222
4.7K
1K
ERROR AMP.
ADJUST
4.7K
5K
I
ADJUST
100K
COMP
V
FB
I
SENSE
R
T
/C
T
1
2
3
4
C
T
7
6
5
8
V
REF
V
i
OUTPUT
GROUND
0.1
μ
F
0.1
μ
F
V
REF
V
i
OUTPUT
GROUND
1W
1K
D95IN343
Figure 5. Oscillator Frequency vs Timing
Resistance
Figure 6. Maximum Duty Cycle vs Timing
Resistor
Figure 7. Oscillator Discharge Current vs.
Temperature.
Figure 8. Error Amp Open-Loop Gain and
Phase vs. Frequency.
300
1K
3K
10K
30K
R
T
(
)
1K
10K
100K
1M
f
o
(Hz)
D96IN362
1nF
2.2nF
47nF
300
1K
3K
10K
30K
R
T
(
)
0
20
40
60
f
o
(Hz)
D96IN363
80
-55
-25
0
25
50
75
100 T
A
(C)
7.0
7.5
8.0
8.5
I
dischg
(mA)
D95IN335
V
i
=15V
V
OSC
=2V
10
100
1K
10K
100K
1M
f(Hz)
-20
0
20
40
60
80
(dB)
180
150
120
90
60
30
φ
D95IN337
V
i
=15V
V
O
=2V to 4V
R
L
=100K
T
A
=25C
Gain
Phase
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| UC284XAD | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:CURRENT MODEPWM CONTROLER |
| UC284XADM | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:CURRENT MODEPWM CONTROLER |
| UC284XAM | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:CURRENT MODEPWM CONTROLER |
| UC284XAY | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:CURRENT MODEPWM CONTROLER |
| UC284XBD | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
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