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MC34067 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. MC34067
Description  High Performance Resonant Mode Controllers
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC34067 Datasheet(HTML) 5 Page - ON Semiconductor

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MC34067, MC33067
http://onsemi.com
5
One−Shot Period is Measured
at the Drive Outputs.
Oscillator Discharge Time is Measured at the Drive Outputs.
COSC = 200 pF
60
30
20
10
6.0
3.0
500
0
tdischg, OSCILLATOR DISCHARGE TIME (ms)
3500
3000
2500
2000
1500
1000
IOSC, OSCILLATOR CONTROL CURRENT (mA)
0.35
0.30
0.25
0.20
0.15
0.10
IOSC, OSCILLATOR CONTROL CURRENT (mA)
tOS, ONE−SHOT PERIOD (ms)
0
0.05
200
VCC = 12 V
TA = 25°C
ROSC = 18.2 k
400
300
100
500
COSC = 300 pF
0
−10
−20
−30
−40
−50
50
40
30
20
10
0
f, FREQUENCY (Hz)
TA, AMBIENT TEMPERATURE (°C)
−20
−10
Gain
50
60
70
80
90
100
120
110
COSC = 500 pF
COSC = 300 pF
VCC = 12 V
RVFO = ∞
RT = ∞
CT = 500 pF
TA = 25°C
Figure 2. Oscillator Timing Resistor
versus Discharge Time
Figure 3. Oscillator Frequency versus
Oscillator Control Current
Figure 4. Error Amp Output Low State Voltage
versus Oscillator Control Current
Figure 5. One−Shot Timing Resistor
versus Period
Figure 6. Open Loop Voltage Gain and Phase
versus Frequency
Figure 7. Reference Output Voltage Change
versus Temperature
0
400
800
1200
1600
2000
0
20
406080
100
0
0.5
1.0
1.5
2.0
2.5
3.0
0.1
0.3
0.6
1.0
3.0
6.0
10
10 k
100 k
1.0M
10M
−55
−25
0
25
50
75
125
100
VCC = 12 V
VO = 2.0 V
RL = 100 k
TA = 25°C
VCC = 12 V
RL = ∞
*Vref at TA = 25°C
VCC = 12 V
COSC = 500 pF
ROSC = 100 k
TA = 25°C
Phase
Margin
= 64
°
*Vref = 5.1 V
CT = 200 pF
CT = 300 pF
CT = 500 pF
Phase
*Vref = 5.2 V
*Vref = 5.0 V


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