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KA384X 数据表(PDF) 3 Page - Estek Electronics Co. Ltd

部件名 KA384X
功能描述  Current Mode PWM Controller
PDF  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  ESTEK [Estek Electronics Co. Ltd]
网页  http://www.estek.com.cn/en/index.asp
标志 ESTEK - Estek Electronics Co. Ltd

KA384X 数据表(HTML) 3 Page - Estek Electronics Co. Ltd

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KA384x
www.estek.com.cn
Copyright @ Estek Electronics Co., Ltd
Version 0.2
27 July 2011
3
Electrical Characteristics
(TA=25 °C, VCC=15V, RT=10KΩ, CT=3.3nF, TA=0
oC to +70oC, unless otherwise specified .)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Reference Section
VREF
Reference Output Voltage
TJ=25
oC, IREF=1mA
4.9
5.0
5.1
V
Regline
Line Regulation
12V≤VCC≤25V
-
6.0
20
mV
Regload
Load Regulation
1mA≤IREF≤20mA
-
6.0
25
mV
ISC
Short Circuit Output Current
TA=25
oC
-
-100
-180
mA
Oscillator Section
f
Oscillator Frequency
TJ=25
oC
47
52
57
KHz
△
f/△VCC
Frequency Change with Voltage
12V≤VCC≤25V
-
0.05
1.0
%
V(OSC)
Oscillator Amplitude
(peak to peak)
-
1.6
-
V
Error Amplifier Section
IBIAS
Input Bias Current
VFB=3V
-
-0.1
-2.0
uA
VIN(E.A)
Input Voltage
Vpin1=2.5V
2.42
2.5
2.58
V
AVOL
Open Loop Voltage Gain
2V≤Vo≤4V
65
90
-
dB
UGBW
Unity Gain Bandwidth
Tj=25
oC, Note 3
0.5
0.6
-
MHz
PSRR
Power Supply Rejection Ratio
12V≤VCC≤25V
60
70
-
dB
ISINK
Output Sink Current
Vpin2=2.7V, Vpin1=1.1V
2.0
7.0
-
mA
ISOURCE
Output Source Current
Vpin2=2.3V, Vpin1=5.0V
-0.5
-1.0
-
mA
VOH
High Output Voltage
Vpin2=2.3V, RL=15KΩ to GND
5.0
6.0
-
V
VOL
Low Output Voltage
Vpin2=2.3V, RL=15KΩ to pin 8
-
0.8
1.1
V
Current Sense Section
GV
Gain
( Note 1 & 2 )
2.85
3.0
3.15
V/V
VIN(MAX)
Maximum Input Signal
Vpin1=5V (Note 1)
0.9
1.0
1.1
V
SVR
Supply Voltage
12V≤VCC≤25V
-
70
-
dB
IBIAS
Input Bias Current
Vpin3=3V
-
-3.0
-10
uA
Output Section
ISINK=20mA
-
0.08
0.4
VOL
Low Output Voltage
ISINK=200mA
-
1.4
2.2
ISINK=20mA
13
13.5
VOH
High Output Voltage
ISINK=200mA
12
13.0
-
V
tR
Rise Time
TJ=25
oC,CL=1nF (Note 3)
-
45
150
tF
Fall Time
TJ=25
oC,CL=1nF (Note 3)
-
35
150
nS
Under-voltage Lockout Section
KA3842 / KA3844
14.5
16.0
17.5
VTH(ST)
Start Threshold
KA3843 / KA3845
7.8
8.4
9.0
V
KA3842 / KA3844
8.5
10
11.5
VOPR(min)
Min. Operating Voltage
(After Turn On)
KA3843 / KA3845
7.0
7.6
8.2
V
ET-



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