Texas Instruments SLVP089 - Manual (Page 27)

Design Procedures
2-9 Design Procedure
Figure 2–3 shows the bode plot for the compensation network.
Figure 2–3. Bode Plot
25
20
10
0
Gain
–
dB (Solid)
30
40
Frequency – Hz
45
35
15
90
70
50
30
10
–10
–30
–50
–90
Phase
–
Degrees (Dashed)
10 102 103 104 105
5 –70
Note from the output response shown in Figure 2–4 that the minimum phase
margin is 40 degrees and the bandwidth is 18 kHz under nominal operating
conditions.
Figure 2–4. Output Response
105
–360
30
20
0
–20
Gain
–
dB (Solid)
40
60
Frequency – Hz
OUTPUT RESPONSE
70
50
10
–180
–225
–270
–315 Phase
–
Degrees (Dashed)
10 102 103 104
–10