MB39A102_05 Datasheet, PDF (10/32 Pages) Tyco Electronics – 4-ch DC/DC Converter IC

MB39A102
Triangular Wave Oscillation Frequency
vs. Timing Resistor
10000
Ta = +25 °C
VCC = 4 V
CTL = 3 V
1000
CT = 39 pF
100
CT = 100 pF
CT = 560 pF CT = 220 pF
Triangular Wave Oscillation Frequency
vs. Timing Capacitor
10000
Ta = +25 °C
VCC = 4 V
CTL = 3 V
1000
RT = 11 kΩ
100
RT = 24 kΩ
RT = 130 kΩ RT = 56 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
vs. Triangular Wave Oscillation Frequency
1.20
1.10
1.00
0.90
Ta = +25 °C
VCC = 4 V
CTL = 3 V
RT = 24 kΩ
Upper
0.80
0.70
0.60
0.50
0.40
Lower
0.30
0.20
0 200 400 600 800 1000 1200 1400 1600
Triangular wave oscillation frequency fOSC (kHz)
Triangular Wave Upper and Lower Limit Voltage
vs. Operating Ambient Temperature
1.20
VCC = 4 V
1.10 _{CTL = 3 V}
1.00
RT = 24 kΩ
CT = 100 pF
0.90
Upper
0.80
0.70
0.60
0.50
Lower
0.40
0.30
0.20
−40 −20 0
20 40 60 80 100
Operating ambient temperature Ta ( °C)
Triangular Wave Oscillation Frequency
vs. Operating ambient Temperature
560
VCC = 4 V
CTL = 3 V
540
RT = 24 kΩ
CT = 100 pF
520
500
480
460
440
−40 −20 0 20 40 60 80 100
Operating ambient temperature Ta ( °C)
10
(Continued)