mb3881pff Fujitsu Microelectronics, Inc., mb3881pff Datasheet - Page 15

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mb3881pff

Manufacturer Part Number
mb3881pff
Description
8-ch Dc/dc Converter Ic With Synchronous Rectifier For Voltage Step-up And Step-down
Manufacturer
Fujitsu Microelectronics, Inc.
Datasheet

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(Continued)
10000
560
540
520
500
480
460
440
1000
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
100
Triangular wave upper and lower limit voltage
10
1
0
Triangular wave oscillator frequency f
40
0
1
Triangular wave oscillator frequency
vs.triangular wave oscillator frequency
Triangular wave oscillator frequency
100 200 300 400 500 600 700 800 900 1000
20
Ambient temperature Ta ( C)
vs. ambient temperature
Timing capacitor C
VCC
CTL 1
RT
CT
vs. timing capacitor
10
0
11 k
100 pF
9 V
CTL 2
20
100
40
CTL 3
Ta
VCC
T
1000
(pF)
60
RT
RT
RT
25 C
9 V CT
Ta
VCC
CTL 4
Upper
Lower
6.8 k
11 k
51 k
80
OSC
25 C
9 V
100 pF
10000
5 V
(kHz)
100
10000
1000
100
10
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Triangular wave upper and lower limit voltage
1
0
1 k
Power dissipation vs. ambient temperature
1000
800
600
400
200
40
0
Triangular wave oscillator frequency
40
20
Ambient temperature Ta ( C)
Ambient temperature Ta ( C)
20
vs. ambient temperature
Timing resistor R
vs. timing resistor
0
0
20
20
10 k
40
VCC
RT
40
T
11 k CT
60
( )
9 V
Ta
VCC
60
MB3881
80
CT
CT
CT
CT
CT
25 C
Upper
Lower
9 V
(Continued)
80
100 pF
100 k
100
47 pF
100 pF
220 pF
470 pF
680 pF
100
15

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