MB39A115 Datasheet, PDF (14/42 Pages) Fujitsu Component Limited. – 5 ch DC/DC Converter IC with Synchronous Rectification

MB39A115
(Continued)
ON Duty vs. DTC Terminal Voltage
100
95 ^{Ta = +25 °C}
VCC = 7 V
90 _{CTL = 3 V}
85
FB = 2 V
RT = 6.2 kΩ
80 CT = 100 pF
75
70
Calculating value
65
60
Measurement value
55
50
0.6
0.65
0.7 0.75 0.8
0.85
0.9
DTC Terminal Voltage VDTC (V)
Error Amp Voltage Gain, Phase vs. Frequency
50
40
30
20
10
0
−10
−20
−30
−40
−50
1k
Av
φ
225
Ta = +25 °C
VCC = 7 V
180
135
90
45
0
−45
−90
−135
−180
10 k
100 k
1M
Frequency f (Hz)
−225
10 M
Power Dissipation vs.
Operating Ambient Temperature
(for TSSOP-38P)
2000
1800
1600
1400
1200
1000
800
600
400
200
0
−40 −20 0
20 40 60 80 100
Operating Ambient Temperature Ta ( °C)
Start Power Supply Voltage vs. Timing Resistor
2
Ta = −30 °C
Ta = +25 °C
1.5
VCTL = VCC
CT = 100 pF
1
1
10
100
Timing Resistor RT (kΩ)
2.0 V
240 kΩ
10 kΩ
1 µF ₊
IN
10 kΩ
37 −
2.4 kΩ _{38 +}
+
36
OUT
1.5 V 1.0 V Error Amp1
the same as other
channels
Power Dissipation vs.
Operating Ambient Temperature
(for BCC-40P)
2000
1800
1600
1400
1200
1000
800
600
400
200
0
−40 −20 0
20 40 60 80 100
Operating Ambient Temperature Ta ( °C)
14