S3843 Datasheet, PDF (7/8 Pages) AUK corp – Current Mode PWM Controller

Electrical Characteristic Curves
OUTPUT DEAD-TIME vs.
OSCILLATOR FREQUENCY
100
V c c =15V
50 ^{Ta = 25oC}
20
Ct=10n F
10
5.0n F
2.0n F
1.0n F
500pF
5.0
200pF
2.0
100pF
1.0
10K
20K
50K 100K 200K 500K 1.0M
fOSC OS CILLATOR FREQUENCY (KHz )
Error Amplifier Open-Loop
Frequency Response
80
0
60
-45
φ
40
-90
20
-135
AV
0
-180
10 100
1K
10K 100K
FREQUENCY (Hz)
1M 10M
S3843
TIMING RESISTOR vs.
OSCILLATOR FREQUENCY
80
50
500pF
20 5.0n F
100pF
8.0
200pF
5.0
2.0 _{V c c =15V}
Ta = 25^oC
0.8
10K 20K
CT=10n F
2.0n F 1.0n F
50K 100K 200K 500K 1.0M
fOSC OS CILLA TOR FR EQUENCY (KHz )
Output Saturation Characteristics
4
Vcc=15V
Ta = 25^oC
3
Ta=-55^o C
2
1 ^{SOURCE SAT(Vcc-VOH)}
SINK SAT(VOL)
0
0.1 0.2 0.3 0.4 0.5 0.7 1
2 3 4 5 7 10
OUTPUT CURRENT SOURCE OR SINK (A)
KSI-8007-001
7