Texas Instruments SLVP089 manual Bode Plot

Design Procedures

Figure 2–3 shows the bode plot for the compensation network.

Figure 2–3. Bode Plot

	45				90
	40				70
	35				50	Phase – Degrees (Dashed)
Gain – dB (Solid)	30				30
	25				10
	20				–10
	15				–30
	10				–50
	5				–70
	0	102	103	104	–90
	10				105

Frequency – Hz

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

OUTPUT RESPONSE

	70				–180
	60
	50				–225	Phase – Degrees (Dashed)
Gain – dB (Solid)	40
	30
					–270
	20
	10
	0				–315
	–10
	–20	102	103	104	–360
	10				105

Frequency – Hz

Design Procedure 2-9