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DC-DC Converter Control Circuits
MC34063A
TYPICAL ELECTRICAL CHARACTERISTICS
Emitter Follower Configuration Output Saturation
Output Switch ON-OFF Time vs Oscillator
Voltage vs Emitter Current
Timing Capacitor
Common Emitter Configuration Output Switch
Darlington Configuration Collector Emitter
Saturation Voltage vs Collector Current
Saturation Voltage (VCE(sat)) vs Temperature
Power Collector Emitter Ssturation Voltage
Current Limit Sense Voltage Voltage (V
ipk) vs
(VCE(sat)) vs Temperature
Temperature
HTC
4
IE(㎃)
400
800
1.45
VCE(sat)
0
1200
(V)
1.40
1.50
1.55
1.65
1.60
1.70
1.75
0
400
800
1200
1C(㎃)
VCE(sat)
(V)
1.0
0.8
0.6
0.4
0.2
Darlington Connection
VCC=5V
Pin7=VCC
Pins2,3,5=GND
Ta=25℃
Forced β =20
VCC=5V
Pin1,7,8=VCC
Pins3,5=GND
Ta=25℃
VCE(sat)
350
550
500
450
400
600
80
40
0
TJ(℃)
120
-40
VCC=5V
I
C=1A
VCC=5V
I
C=1A
Ton Toff
(㎲)
200
150
100
50
0.01
0
0.1
1
CT(㎋)
VCC=5V
Pin7=VCC
Pin5=GND
Ta=25℃
(㎷)
VCE(sat)
(㎷)
1000
950
900
850
800
-40
750
0
40
80
120
TJ(℃)
Vipk
(㎷)
270
280
290
300
310
320
-40
0
40
80
120
TJ(℃)
MC34063A
VCC=5V
I
chg=Idischg
0
Ton
Toff