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參數資料
型號: FMS7401LVN14
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 微控制器/微處理器
英文描述: Digital Power Controller
中文描述: 8-BIT, EEPROM, 2.04 MHz, MICROCONTROLLER, PDIP14
封裝: PLASTIC, DIP-14
文件頁數: 28/80頁
文件大小: 1535K
代理商: FMS7401LVN14
FMS7401/7401L
PRODUCT SPECIFICATION
28
REV. 1.0.2 6/23/04
Table 10. Programmable Comparator Upper Voltage Reference V
THU
(Levels 32 – 63)
5.2
The Programmable Comparator circuit is configured to compare the G4/AIN0 or G2/AIN2 non-inverting input against the out-
put of the Uncommitted (Error) Amplifier (A
OUT
) when configured in a voltage/current loop control mode. In the voltage/cur-
rent loop control, the inner (current) loop is performed by comparing the level on the G4/AIN0 or G2/AIN2 input against the
voltage present at the Uncommitted (Error) Amplifier (A
OUT
). The Uncommitted Amplifier performs the outer (voltage) loop
control by detecting the error signal and driving the current control loop to modify the PWM duty cycle (see
Figure 9
). The
FMS7401/7401L voltage/current loop configuration can be used in SMPS applications where the digital loop control does not
have the required accuracy and speed. Refer to the
ADC Circuit
section of the datasheet for the Uncommitted Amplifier config-
uration details.
Hardware Voltage and Current Loop Control (VLOOP=1)
When VLOOP=1, the comparator output (C
OUT
) is 1 when the G4/AIN0 or G2/AIN2 input pin rises above A
OUT
. As long as the
input stays above A
OUT
, the C
OUT
signal will hold its state. The C
OUT
signal will equal zero if the G4/AIN0 or G2/AIN2 input
voltage falls below A
OUT
or if the Programmable Comparator circuit is disabled. If the digital delay filter circuit is enabled
(EPWM=0), the C
OUT
signal is monitored for its rising edge to generate the PWMOFF signal. Refer to
Figure 9
and the
following
Digital Delay Filter with PWMOFF Output
section for addition details.
Level
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
CL[5]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CL[4]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CL[3]
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
CL[2]
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CL[1]
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CL[0]
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Voltage Reference
0.46V
0.51V
0.56V
0.61V
0.66V
0.71V
0.76V
0.81V
0.86V
0.91V
0.96V
1.01V
1.06V
1.11V
1.16V
1.21V
1.27V
1.32V
1.37V
1.43V
1.48V
1.53V
1.58V
1.63V
1.68V
1.73V
1.78V
1.83V
1.88V
1.94V
1.99V
2.04V
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