MB39A104 Datasheet, PDF (9/36 Pages) Fujitsu Component Limited. – 2-ch DC/DC Converter IC

MB39A104
Triangular Wave Oscillation Frequency
vs. Timing Resistor
10000
Ta = +25 °C
VCC = 12 V
CTL = 5 V
1000
CT = 39 pF
100
CT = 560 pF
CT = 220 pF _{CT = 100 pF}
Triangular Wave Oscillation Frequency
vs. Timing Capacitor
10000
Ta = +25 °C
VCC = 12 V
CTL = 5 V
1000
RT = 11 kΩ
100
RT = 24 kΩ
RT = 130 kΩ RT = 68 kΩ
10
1
10
100
1000
Timing resistor RT (kΩ)
10
10
100
1000
Timing capacitor CT (pF)
10000
Triangular Wave Upper and Lower Limit Voltage ^{Triangular Wave Upper and Lower Limit Voltage}
vs. Triangular Wave Oscillation Frequency
vs. Ambient Temperature
3.2
Ta = +25 °C
3.0 VCC = 12 V
2.8
CTL = 5 V
RT = 47 kΩ
2.6
Upper
2.4
2.2
2.0
1.8
1.6
Lower
1.4
1.2
0 200 400 600 800 1000 1200 1400 1600
Triangular wave oscillation frequency fOSC (kHz)
3.2
VCC = 12 V
3.0 _{CTL = 5 V}
2.8 ^{RT = 24 kΩ}
CT = 100 pF
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
−40 −20 0
Upper
Lower
20 40 60 80 100
Ambient temperature Ta ( °C)
Triangular Wave Oscillation Frequency
vs. Ambient Temperature
560
VCC = 12 V
CTL = 5 V
540
RT = 24 kΩ
CT = 100 pF
520
500
480
460
440
−40 −20 0
20 40 60 80 100
Ambient temperature Ta ( °C)
Triangular Wave Oscillation Frequency
vs. Power supply voltage
560
Ta = +25 °C
CTL = 5 V
540
RT = 24 kΩ
CT = 100 pF
520
500
480
460
440
0
5
10
15
20
Power supply voltage VCC (V)
(Continued)
9