MB39A112 Datasheet, PDF (8/35 Pages) Fujitsu Component Limited. – 3-ch DC/DC Converter IC

MB39A112
s TYPICAL CHARCTERISTICS
Power Supply Current vs. Power Supply Voltage
10
Ta = +25 °C
RT = OPEN
8
6
4
2
0
0
5
10
15
20
25
Power supply voltage VCC (V)
Error Amp (ERR1)
Threshold Voltage vs. Ambient Temperature
2.0
1.5
VCC = 12 V
FB1 = 0 mA
1.0
0.5
0.0
−0.5
−1.0
−1.5
−2.0
−40 −20 0
20 40 60 80 100
Ambient temperature Ta ( °C)
Triangular Wave Oscillation Frequency vs.
Timing Resistor
10000
Ta = +25 °C
VCC = 12 V
1000
CT = 22 pF
CT = 100 pF
CT = 1000 pF CT = 390 pF
100
Error Amp (ERR2, ERR3)
Threshold Voltage vs. Ambient Temperature
2.0
1.5
VCC = 12 V
FB2(3) = 0 mA
1.0
0.5
0.0
−0.5
−1.0
−1.5
−2.0
−40 −20 0
20 40 60
80 100
Ambient temperature Ta ( °C)
Triangular Wave Oscillation Frequency vs.
Timing Capacitor
10000
Ta = +25 °C
VCC = 12 V
1000
RT = 22 kΩ
100
RT = 4.7 kΩ
RT = 10 kΩ
10
1
10
100
1000
Timing resistor RT (kΩ)
10
10
100
1000
10000
Timing capacitor CT (pF)
(Continued)
8