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AP64200 Datasheet(PDF) 22 Page - Diodes Incorporated

Part # AP64200
Description  3.8V TO 40V INPUT, 2A LOW IQ SYNCHRONOUS BUCK WITH ADJUSTABLE FREQUENCY
PDF  26 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AP64200 Datasheet(HTML) 22 Page - Diodes Incorporated

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AP64200
Document number: DS43573 Rev. 1 - 2
22 of 26
www.diodes.com
March 2021
© Diodes Incorporated
AP64200
Application Information (continued)
16
External Loop Compensation Design (continued)
AP64200
VIN
EN
SW
BST
FB
GND
INPUT
R1
12.4kΩ
C4
OPEN
R2
10kΩ
L
4.7μH
C3
100nF
C2
2 x 22µF
C1
2 x 10µF
OUTPUT
VOUT
1.8V
RT/CLK
COMP
R5
4.99kΩ
C5
5.6nF
RT
200kΩ
C6
OPEN
VIN
12V
Figure 31. Example Circuit with Calculated Component Values for Loop Compensation
The first-order calculated loop response has the following characteristics:
Bandwidth is around 14.5kHz
Phase Margin is around 74.5°
Gain Margin is around -14.4dB
Figure 32. Closed-Loop Bandwidth
Figure 33. Closed-Loop Phase Margin
-100
-80
-60
-40
-20
0
20
40
60
80
100
100
1,000
10,000
100,000
1,000,000
Frequency (Hz)
-250
-200
-150
-100
-50
0
50
100
150
200
250
100
1,000
10,000
100,000
1,000,000
Frequency (Hz)



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