參數(shù)資料
型號(hào): UC3842ADX
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
中文描述: 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8
封裝: SOIC-8
文件頁(yè)數(shù): 6/12頁(yè)
文件大小: 104K
代理商: UC3842ADX
UC3842A/UC3843A
3
Electrical Characteristics (Continued)
(VCC = 15V, RT = 10K, CT = 3.3nF, TA = 0°C to + 70°C, Unless otherwise specified)
* Adjust VCC above the start threshold before setting at 15V
Notes :
1. These parameters, although guaranteed, are not 100% tested in production.
2. Parameter measured at trip point of latch with V2 = 0V.
3. Gain defined as: GV =
VPIN1VPIN3(VPIN3 = 0 to 0.8V)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
ERROR AMPLIFIER SECTION
Input Voltage
VI
TPIN1 = 2.5V
2.42
2.50
2.58
V
Input Bias Current
IBIAS
-
-0.3
- 2
uA
Open Loop Gain
GVO
VO = 2V to 4V (NOTE 1)
65
90
-
dB
Unity Gain Bandwidth
GBW
TJ= 25
°C (NOTE 1)
0.7
1
-
MHz
PSRR
VCC = 12V to 25V (NOTE 1)
60
70
-
dB
Output Sink Current
ISINK
VPIN2 = 2.7V
VPIN1 = 1.1V
26
-
mA
Output Source Current
ISOURCE
VPIN2 = 2.3V
VPIN1 = 5.0V
-0.5
-0.8
-
mA
Output High Voltage
VOH
VPIN2 = 2.3V
R1 = 15K
to GND
56
-
V
Output Low Voltage
VOL
VPIN2 = 2.7V
R1 = 15K
to Pin8
-0.8
1.1
V
OUTPUT SECTION
Output Low Level
VOL
ISINK = 20mA
-
0.1
0.4
V
ISINK = 200mA
-
1.5
2.2
V
Output High Level
VOH
ISOURCE = 20mA
13
13.5
-
V
ISOURCE = 200mA
12
13.5
-
V
Rise Time
tR
TJ = 25
°C, C1 = 1nF (NOTE 1)
-
40
100
ns
Fall Time
tF
TJ = 25
°C, C1 = 1nF (NOTE 1)
-
40
100
ns
Output Voltage Swing Limit
VOLIM
VCC = 27V, C1 = 1nF
-
22
-
V
UNDER VOLTAGE LOCKOUT SECTION
Start Threshold
VTH
UC3842A
15
16
17
V
UC3843A
7.8
8.4
9.0
V
Min. Operating Voltage
( After turn on )
VTL
UC3842A
9
10
11
V
UC3843A
7.0
7.6
8.2
V
PWM SECTION
Maximum Duty Cycle
DMAX
UC3842A/UC3843A
94
96
100
%
Minimum Duty Cycle
DMIN
-
--
0
%
TOTAL STANDBY CURRENT
Start-Up Current
IST
-
-0.2
0.4
mA
Operating Supply Current
ICC
VPIN2 = VPIN3 = 0V
-
11
17
mA
VCC Zener Voltage
VZ
ICC = 25mA
-
29
-
V
相關(guān)PDF資料
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UC3843ADW 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
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