MB39A105
Triangular Wave Oscillation Frequency | Triangular Wave Oscillation Frequency |
vs. Timing Resistor | vs. Ambient Temperature |
Triangular wave oscillation |
| 10000 |
|
| Ta = +25 °C | Triangularwave oscillation | 600 |
|
|
|
|
|
|
|
frequency fOSC (kHz) |
|
|
|
|
|
|
|
| VCC = 3.3 V |
| ||||
|
|
| VCC = 3.3 V |
|
|
|
|
| RT = 7.5 kΩ |
| ||||
|
|
|
| 550 |
|
|
|
|
|
|
| |||
1000 |
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
| 500 |
|
|
|
|
|
|
| |||
100 |
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
| 450 |
|
|
|
|
|
|
| |||
|
|
|
| (kHz)frequencyOSCf |
|
|
|
|
|
|
| |||
|
| 10 | 1 | 10 | 100 |
| 400−40 | −20 | 0 | 20 | 40 | 60 | 80 | 100 |
|
|
|
| Timing resistor RT (kΩ) |
|
| Ambient temperature Ta (°C) |
| ||||||
Max On Duty (%)
Max On Duty vs.
Triangular Wave Oscillation Frequency
100 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Ta = +25 °C |
| ||||||||||||||
95 |
| VCC = 3.3 V |
| ||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
90
85
80
75
70
10 | 100 | 1000 | 10000 |
Triangular wave oscillation frequency fOSC (kHz)
Error Amplifier Gain and Phase
vs. Frequency
Gain AV (dB)
40
30
20
10
0 −10 −20 −30 −40
ϕ
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Ta = |
| +25 °C | 180 |
| ||||||||||
| VCC = 3.3 V |
| |||||||||||||
AV |
|
|
| ||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
| 90 | (deg) |
|
|
|
|
|
|
|
|
|
|
|
|
| 0 | ||
|
|
|
|
|
|
|
|
|
|
|
|
| φ | ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
| −90 | Phase |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
−180
10 kΩ
1 ∝F
+
IN | 2.4 kΩ |
|
10 kΩ 
240 kΩ
10−
11 | + | 9 | |
+ | OUT | ||
| |||
|
| Error Amp | |
| 1.24 V |
|
100 1 k 10 k 100 k 1 M 10 M
Frequency f (Hz)
(Continued)
8
