KA3842A/KA3842AM
Electrical characteristics (*V
CC
=15V, R
T
=10kΩ, C
T
=3.3nF, T
A
=0
0
C to +70
0
C, unless
Ω
otherwise specified)
Characteristics
Reference Section
Reference Output Voltege
Line Regulation
Load Regulation
Short Circit Output Current
Oscillator Section
Oscillation Freguency
Frequency Change with
Voltage
Oscillator Amplitude
Error Amplifier Section
Input Bias Current
Input Voltage
Open Loop Voltage Gain
Power Supply Rejection Ratio
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
Current Sense Section
Gain
Maximum Input Signal
Power Supply Rejection Ratio
Input Bias Current
Output Section
Low Output Voltage
High Output Voltage
Rise Time
Fall Time
Symbol
V
REF
∆V
REF
∆V
REF
I
SC
f
∆f/∆V
CCF
V
(OSC)
I
BIAS
V
I(E.A)
G
VO
PSRR
I
SINK
I
SOURCE
V
OH
V
OL
G
V
V
I(MAX)
PSRR
I
BIAS
V
OL
V
OH
t
R
t
F
I
SINK
I
SINK
I
SINK
I
SINK
Test Condition
T
J
= 25°C, I
REF
= 1 mA
12V
≤
V
CC
≤
25 V
1 mA
≤
I
REF
≤
20mA
T
A
= 25°C
T
J
= 25°C
12V
≤
V
CC
≤
25 V
Min
4.9
Typ
5.0
6.0
6.0
-100
Max
5.1
20
25
-180
57
1.0
Unit
V
mV
mA
KHz
%
V
p-p
47
52
0.05
1.6
-0.1
-2
2.58
V
1
= 2.5V
2V
≤
V0
≤
4V
12V
≤
V
CC
≤
25 V
V
2
= 2.7V, V
1
= 1.1V
V
2
= 2.3V, V
1
= 5V
V
2
= 2.3V, R
L
= 15KΩ to GND
V
2
= 2.7V, R
L
= 15KΩ to PIN 8
(Note 1 & 2)
V
1
= 5V (Note1)
12V
≤
V
CC
≤
25 V (Note 1)
2.42
65
60
2
-0.5
5.0
2.5
90
70
7
-1.0
6.0
0.8
µA
V
dB
mA
mA
V
1.1
3.15
1.1
-10
0.4
2.2
V/V
V
dB
µA
2.85
0.9
3.0
1.0
70
-3.0
=
=
=
=
20 mA
200 mA
20 mA
200 mA
13
12
T
J
= 25°C, C
L
= 1nF (Note 3)
T
J
= 25°C, C
L
= 1nF (Note 3)
14.5
8.5
0.08
1.4
13.5
13.0
45
35
16.0
10
V
150
150
17.5
11.5
nS
Under−Voltage Lockout Section
−
Start Theshold
V
TH(ST)
Min. Operating Voltage
(After Turn On)
PWM Section
Max. Duty Cycle
Min. Duty Cycle
Total Standby Current
Start−Up Current
Operating Supply Current
Zener Voltage
V
OPR(min)
V
V
D
(MAX)
D
(MAX)
I
ST
I
CC (OPR)
V
Z
V
3
= V
2
= 0V
95
97
100
%
0
0.17
14
38
0.3
17
mA
30
V
* Adjust V
CC
above the start threshold before setting at 15V
Note 1: Parameter measured at trip point of lath with V
2
=0
Note 2: Gain defined as A=∆V
1
/∆V
3
; 0
≤
V
3
≤
0.8V
Note 3: These parameters, although guaranteed, are not 100% tested in production.
2
WINGS [ WING SHING COMPUTER COMPONENTS ]
