MB3821 Datasheet, PDF (11/24 Pages) Fujitsu Component Limited. – 2-ch DC/DC Converter IC With Synchronous Rectifier

MB3821
(Continued)
Triangular wave oscillator frequency
vs. ambient temperature
250
240
230
220
210
200
190
180
170
160
150
−40
VCC = 16 V
CTL = 5 V
SEL = 0 V
RT = 10 kΩ, CT = 500 pF
−20 0 20 40 60 80 100
Ambient temperature Ta (°C)
Error amplifier,gain and phase vs. frequency (ch1)
40
30
20
10
0
−10
−20
−30
−40
100
AV
φ
Ta = +25 °C ₁₈₀
135
90
45
0
−45
−90
−135
−180
1k
10 k 100 k 1 M 10 M
Frequency f (Hz)
Triangular wave oscillator frequency
vs. ambient temperature
25
24
23
22
21
20
19
18
17
16
15
−40
VCC = 16 V
CTL = 5 V
SEL = 5 V
RT = 10 kΩ, CT = 500 pF
−20 0 20 40 60 80 100
Ambient temperature Ta (°C)
2.52 V
1 µF
11 kΩ
2.4 kΩ
240 kΩ
−
11 kΩ
+
Error amplifier
1.26 V
Power dissipation vs. ambient temperature
800
740
700
600
500
400
300
200
100
0
−40 −20
0
20 40 60 80 100
Ambient temperature Ta (°C)
11