KA3842A/KA3842AM
Ele c tric a l c h a ra c te ris tic s (*VCC= 1 5 V, RT= 1 0 kW, CT= 3 . 3 n F, TA= 0 0 C to + 7 0 0 C, u n le s s
o th e rwis e s p e c ifie d )
Ch a ra c te ris tic s
Re fe re n c e S e c tio n
Re fe re nce Output Volte ge
Line Re gulation
S ym b o l
Te s t Co n d itio n
Min
Typ
Ma x
Un it
VREF
4.9
5.0
6.0
5.1
20
V
TJ = 25°C, IREF = 1 mA
12V £ VCC £ 25 V
1 mA £ IREF £ 20mA
TA = 25°C
mV
DVREF
DVREF
ISC
Load Re gulation
6.0
25
Short Circit Output Curre nt
Os c illa to r S e c tio n
-100
-180
mA
Oscillation Fre gue ncy
f
47
52
57
KHz
%
TJ = 25°C
Fre que ncy Change with
Voltage
0.05
1.0
Df/ DVCCF
12V £ VCC £ 25 V
Oscillator Amplitude
Erro r Am p lifie r S e c tio n
Input Bias Curre nt
V
1.6
Vp-p
(OSC)
IBIAS
-0.1
2.5
90
-2
mA
V
Input Voltage
V
V1 = 2.5V
2.42
65
2.58
I(E.A)
Ope n Loop Voltage Gain
Powe r Supply Re je ction Ratio
Output Sink Curre nt
Output Source Curre nt
High Output Voltage
Low Output Voltage
Cu rre n t S e n s e S e c tio n
Gain
GVO
dB
2V £ V0 £ 4V
PSRR
ISINK
60
70
12V £ VCC £ 25 V
V2 = 2.7V, V1 = 1.1V
V2 = 2.3V, V1 = 5V
V2 = 2.3V, RL = 15KW to GND
V2 = 2.7V, RL = 15KW to PIN 8
2
7
mA
mA
V
ISOURCE
VOH
-0.5
5.0
-1.0
6.0
0.8
VOL
1.1
GV
(Note 1 & 2)
2.85
0.9
3.0
1.0
70
3.15
1.1
V/ V
V
Maximum Input Signal
Powe r Supply Re je ction Ratio
Input Bias Curre nt
V
I(MAX)
V1 = 5V (Note 1)
PSRR
IBIAS
dB
12V £ VCC £ 25 V (Note 1)
-3.0
-10
mA
Ou tp u t S e c tio n
Low Output Voltage
VOL
VOH
ISINK = 20 mA
0.08
1.4
0.4
2.2
ISINK = 200 mA
V
High Output Voltage
ISINK = 20 mA
13
12
13.5
13.0
45
ISINK = 200 mA
Rise Time
Fall Time
tR
tF
150
150
nS
TJ = 25°C, CL = 1nF (Note 3)
TJ = 25°C, CL = 1nF (Note 3)
35
Un d e r- Vo lta g e Lo c ko u t S e c tio n
Start The shold
VTH(ST)
14.5
8.5
16.0
10
17.5
11.5
V
V
Min. Ope rating Voltage
(Afte r Turn On)
VOPR(min)
P WM S e c tio n
Max. Duty Cycle
D(MAX)
D(MAX)
IST
95
97
100
0
%
Min. Duty Cycle
To ta l S ta n d b y Cu rre n t
Start- Up Curre nt
0.17
0.3
17
mA
V
Ope rating Supply Curre nt
Ze ne r Voltage
ICC (OPR)
VZ
V3 = V2 = 0V
14
38
30
* Adjust VCC above the start thre shold be fore se tting at 15V
Note 1: Parame te r me asure d at trip point of lath with V2= 0
Note 2: Gain de fine d as A= DV1/ DV3 ; 0 £ V3 £ 0.8V
Note 3: The se parame te rs, although guarante e d, are not 100% te ste d in production.
2
Wing Shing [ WING SHING COMPUTER COMPONENTS ]
