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參數(shù)資料
| 型號： | UC3844 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Current Mode PWM Controller(電流模式PWM控制器) |
| 中文描述： | 電流模式PWM控制器（電流模式的PWM控制器） |
| 文件頁數(shù)： | 4/11頁 |
| 文件大小： | 96K |
| 代理商： | UC3844 |
Notes :
2. Theseparameters, although guaranteed, are not 100% tested in production.
3. Parameter measured at trippoint of latchwith V
PIN2
= 0.
4. Gaindefined as :
V
PIN1
A =
; 0
≤
V
PIN3
≤
0.8V
V
PIN3
5. Adjust V
above the startthreshold before settingat 15 V.
6. Outputfrequency equals oscillator frequency forthe UC3842and UC3843.
Outputfrequency is one halfoscillator frequency for the UC3844 and UC3845.
ELECTRICAL CHARACTERISTICS
(continued)
Symbol
Parameter
Test Conditions
UC284X
Min. Typ. Max. Min. Typ. Max.
UC384X
Unit
UNDER-VOLTAGE LOCKOUT SECTION
Start Threshold
X842/4
15
16
17
14.5
16
17.5
V
X843/5
7.8
8.4
9.0
7.8
8.4
9
V
Min Operating Voltage
After Turn-on
X842/4
9
10
11
8.5
10
11.5
V
X843/5
7.0
7.6
8.2
7.0
7.6
8.2
V
PWM SECTION
Maximum Duty Cycle
X842/3
93
97
100
93
97
100
%
X844/5
46
48
50
47
48
50
%
Minimum Duty Cycle
0
0
%
TOTAL STANDBY CURRENT
I
st
I
i
V
iz
Start-up Current
0.5
1
0.5
1
mA
Operating Supply Current
V
PIN2
= V
PIN3
= 0V
I
i
= 25mA
11
20
11
20
mA
Zener Voltage
34
34
V
UC2842/3/4/5-UC3842/3/4/5
4/11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3844/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Performance Current Mode Controller |
| UC3844_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:High Performance Current Mode Controllers |
| UC3844_11 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3844A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Current Mode PWM Controller |
| UC3844A-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 |
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