MB39A115 Datasheet, PDF (13/42 Pages) Fujitsu Component Limited. – 5 ch DC/DC Converter IC with Synchronous Rectification

MB39A115
Triangular Wave Oscillation Frequency vs.
Timing Resistor
10000
Ta = +25 °C
VCC = 7 V
CTL = 3 V
1000
CT = 27 pF
CT = 100 pF
100 ^{CT = 680 pF CT = 220 pF}
Triangular Wave Oscillation Frequency vs.
Timing Capacity
10000
Ta = +25 °C
VCC = 7 V
CTL = 3 V
1000
RT = 2.4 kΩ
RT = 6.2 kΩ
100
RT = 36 kΩ RT = 13 kΩ
10
1
10
100
1000
Timing Resistor RT (Ω)
Triangular Wave Upper and Lower Limit Voltage
vs. Triangular Wave Oscillation Frequency
1.20
1.10
Ta = +25 °C
VCC = 7 V
1.00 CTL = 3 V
0.90 ^{RT = 6.2 kΩ}
Upper limit
0.80
0.70
0.60
0.50
0.40
0.30
Lower limit
0.20
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200
Triangular Wave Oscillation Frequency fOSC (kHz)
Triangular Wave Oscillation Frequency
vs. Operating Ambient Temperature
1100
1080
1060
1040
VCC = 7 V
CTL = 3 V
RT = 6.2 kΩ
CT = 100 pF
1020
1000
980
960
940
920
900
−40 −20 0 20 40 60 80 100
Operating Ambient Temperature Ta ( °C)
10
10
100
1000
10000
Timing Capacity CT (pF)
Triangular Wave Upper and Lower Limit Voltage
vs. Operating Ambient Temperature
1.20
1.10
VCC = 7 V
CTL = 3 V
1.00 RT = 6.2 kΩ
0.90 ^{CT = 100 pF}
Upper limit
0.80
0.70
0.60
0.50
0.40
Lower limit
0.30
0.20
−40 −20
0 20 40 60 80 100
Operating Ambient Temperature Ta ( °C)
(Continued)
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