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參數(shù)資料
| 型號： | UC3845 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | High Performance Current Mode Controllers(高性能電流模式控制器) |
| 中文描述： | 高性能電流模式控制器（高性能電流模式控制器） |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 354K |
| 代理商： | UC3845 |
UC3844, UC3845, UC2844, UC2845
http://onsemi.com
4
0
V
O
, ERROR AMP OUTPUT VOLTAGE (V)
0
,
V
0.2
0.4
0.6
0.8
1.0
1.2
2.0
4.0
6.0
8.0
V
CC
= 15 V
T
A
= 25
°
C
T
A
= 55
°
C
T
A
= 125
°
C
R
Ω
,
Figure 2. Timing Resistor versus
Oscillator Frequency
Figure 3. Output Deadtime versus
Oscillator Frequency
Figure 4. Error Amp Small Signal
Transient Response
Figure 5. Error Amp Large Signal
Transient Response
0.5 s/DIV
2
V
CC
= 15 V
A
V
= 1.0
T
A
= 25
°
C
V
CC
= 15 V
A
V
= 1.0
T
A
= 25
°
C
1.0 s/DIV
2
10 k
20 k
50 k
100 k
200 k
500 k
1.0 M
f
osc
, OSCILLATOR FREQUENCY (Hz)
V
CC
= 15 V
T
A
= 25
°
C
10 k
20 k
50 k
100 k
200 k
500 k
1.0 M
f
osc
, OSCILLATOR FREQUENCY (Hz)
%
Figure 6. Error Amp Open Loop Gain and
Phase versus Frequency
Figure 7. Current Sense Input Threshold
versus Error Amp Output Voltage
NOTE: Output switches
at onehalf the oscillator
frequency.
C
T
= 10 nF
5.0 nF
2.0 nF
1.0 nF
100
pF
500
pF
200
pF
2.55 V
2.5 V
2.45 V
2.5 V
3.0 V
2.0 V
10
0
50
20
10
5.0
2.0
1.0
75
70
65
60
55
50
20
A
10 M
10
f, FREQUENCY (Hz)
Gain
Phase
V
CC
= 15 V
V
O
= 2.0 V to 4.0 V
R
L
= 100 K
T
A
= 25
°
C
0
30
60
90
120
150
180
100
1.0 k
10 k
100 k
1.0 M
0
20
40
60
80
100
,
φ
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3845A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Current Mode PWM Controller |
| UC3845A-BW | 制造商:FCI 制造商全稱:First Components International 功能描述:Current Mode PWM Controller Low Start-Up and Operating Current |
| UC3845AD | 功能描述:電流型 PWM 控制器 Current Mode RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3845AD1 | 功能描述:電流型 PWM 控制器 RO 511-UC3845BD 9/04 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3845AD1013TR | 制造商:STMicroelectronics 功能描述: |
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