MC33363A データシートの表示（PDF） - ON Semiconductor
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MC33363A Datasheet PDF : 14 Pages
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MC33363A
1.0 M
CT = 100 pF
500 k CT = 200 pF
200 k CT = 500 pF
100 k CT = 1.0 nF
50 k CT = 2.0 nF
VCC = 20 V
TA = 25°C
20 k CT = 5.0 nF
10 k CT = 10 nF
7.0
10
15 20
30
50
70
RT, TIMING RESISTOR (kW)
Figure 2. Oscillator Frequency
versus Timing Resistor
1.5
VCC = 20 V
1.0
CT = 1.0 mF
TA = 25°C
0.8
0.6
0.4
0.3
0.2 Inductor supply voltage and inductance value are
adjusted so that Ipk turn−off is achieved at 5.0 ms.
0.15
7.0
10
15 20
30 40 50
70
RT, TIMING RESISTOR (kW)
Figure 3. Power Switch Peak Drain Current
versus Timing Resistor
0.8
VCC = 20 V
TA = 25°C
0.5
0.3
0.2
0.15
0.1
0.08
7.0
10
15 20
30
50
70
RT, TIMING RESISTOR (kW)
Figure 4. Oscillator Charge/Discharge
Current versus Timing Resistor
70
RD/RT Ratio
Discharge Resistor
Pin 7 to GND
60
VCC = 20 V
CT = 2.0 nF
TA = 25°C
50
40
RC/RT Ratio
Charge Resistor
Pin 7 to Vreg
30
1.0
2.0
3.0
5.0 7.0
10
TIMING RESISTOR RATIO
Figure 5. Maximum Output Duty Cycle
versus Timing Resistor Ratio
100
80
Gain
60
Phase
40
0
VCC = 20 V
VO = 1.0 to 4.0 V
RL = 5.0 MW
30
CL = 2.0 pF
TA = 25°C
60
90
20
120
0
150
−20
10
180
100
1.0 k 10 k 100 k 1.0 M 10 M
f, FREQUENCY (Hz)
Figure 6. Error Amp Open Loop Gain and
Phase versus Frequency
0
−1.0
Source Saturation
Vref
(Load to Ground)
− 2.0
2.0
1.0
Sink Saturation
(Load to Vref)
VCC = 20 V
TA = 25°C
GND
0
0
0.2
0.4
0.6
0.8
1.0
IO, OUTPUT LOAD CURRENT (mA)
Figure 7. Error Amp Output Saturation
Voltage versus Load Current
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