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ANSELA 数据表(PDF) 41 Page - Microchip Technology

部件名 ANSELA
功能描述  Digitally Enhanced Power Analog Controller with Integrated Synchronous Driver
PDF  222 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

ANSELA 数据表(HTML) 41 Page - Microchip Technology

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 2013 Microchip Technology Inc.
DS22331A-page 41
MCP19111
6.6
Compensation Setting
The MCP19111 uses a peak current mode control
architecture. A control reference is used to regulate the
peak current of the converter directly. The inner current
loop essentially turns the inductor into a voltage-
controlled current source. This reduces the control-to-
output transfer function to a simple single-pole model of
a current source feeding a capacitor. The desired
response of the overall loop can be tuned by proper
placement of the compensation zero frequency and
gain. Figure 6-1 shows a simplified drawing of the
internal compensation. See Register 6-6 for the
adjustable zero frequency and gain settings.
FIGURE 6-1:
SIMPLIFIED
COMPENSATION
VREF
+VSEN
-VSEN
REGISTER 6-6:
CMPZCON: COMPENSATION SETTING CONTROL REGISTER
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
CMPZF3
CMPZF2
CMPZF1
CMPZF0
CMPZG3
CMPZG2
CMPZG1
CMPZG0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-4
CMPZF<3:0>: Compensation Zero Frequency Setting bits
0000
= 1500 Hz
0001
= 1850 Hz
0010
= 2300 Hz
0011
= 2840 Hz
0100
= 3460 Hz
0101
= 4300 Hz
0110
= 5300 Hz
0111
= 6630 Hz
1000
= 8380 Hz
1001
= 9950 Hz
1010
= 12200 Hz
1011
= 14400 Hz
1100
= 18700 Hz
1101
= 23000 Hz
1110
= 28400 Hz
1111
= 35300 Hz
bit 3-0
CMPZG<3:0>: Compensation Gain Setting bits
0000
= 36.15 dB
0001
= 33.75 dB
0010
= 30.68 dB
0011
= 28.43 dB
0100
= 26.10 dB
0101
= 23.81 dB
0110
= 21.44 dB
0111
= 19.10 dB
1000
= 16.78 dB
1001
= 14.32 dB
1010
= 12.04 dB
1011
= 9.54 dB
1100
= 7.23 dB
1101
= 4.61 dB
1110
= 2.28 dB
1111
= 0.00 dB



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