參數(shù)資料
型號： UC2844
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)： 13/16頁
文件大?。?/td> 354K
代理商： UC2844
UC3844, UC3845, UC2844, UC2845
http://onsemi.com
13
+
+
Internal
Bias
Reference
Regulator
Oscillator
S
R
Q
V
ref
UVLO
3.6V
34V
7(12)
V
in
= 15V
7(11)
6(10)
5(8)
3(5)
+
0.5mA
Error
Amplifier
1(1)
2(3)
4(7)
8(14)
5(9)
10k
1.0nF
PWM
Latch
Current Sense
Comparator
R
R
2R
R
1.0V
The capacitor’s equivalent series resistance must limit the Drive Output current to 1.0 A. An additional series
resistor may be required when using tantalum or other low ESR capacitors. The converter’s output can provide
excellent line and load regulation by connecting the R2/R1 resistor divider as shown.
T
+
+
+
+
V
CC
UVLO
2.5V
UC3845
+
47
1N5819
+
15
10
1N5819
Connect to
Pin 2 for
closed loop
operation.
+
47
R2
R1
V
O
2 (V
in
)
V
O = 2.5
+ 1
R2
R2
Output Load Regulation
(open loop configuration)
I
O
(mA)
0
2
9
18
36
V
O
(V)
29.9
28.8
28.3
27.4
24.4
Figure 31. StepUp Charge Pump Converter
+
+
Internal
Bias
Reference
Regulator
Oscillator
S
R
Q
V
ref
UVLO
3.6V
34V
7(12)
V
in
= 15V
7(11)
6(10)
5(8)
3(5)
+
0.5mA
Error
Amplifier
1(1)
2(3)
4(7)
8(14)
5(9)
10k
1.0nF
PWM
Latch
Current Sense
Comparator
R
R
2R
R
1.0V
The capacitor’s equivalent series resistance must limit the Drive Output current to 1.0 A.
An additional series resistor may be required when using tantalum or other low ESR capacitors.
T
+
+
+
+
V
CC
UVLO
2.5V
UC3845
+
47
+
15
10
1N5819
+
47
V
O
(V
in
)
Output Load Regulation
I
O
(mA)
0
2
9
18
32
V
O
(V)
14.4
13.2
12.5
11.7
10.6
1N5819
Figure 32. VoltageInverting Charge Pump Converter
相關(guān)PDF資料
PDF描述
UC2845 High Performance Current Mode Controllers(高性能電流模式控制器)
UC3845 High Performance Current Mode Controllers(高性能電流模式控制器)
UC2845AAY CURRENT MODE PWM CONTROLLER
UC284XA CURRENT MODE PWM CONTROLLER
UC2845AL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UC2844/45 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC2844-45 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC2844A 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT-MODE PWM CONTROLLER
UC2844AAY 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:CURRENT MODE PWM CONTROLLER
UC2844AD 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 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
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