參數(shù)資料
型號： ST72141K2B3/XXX
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
封裝： 0.400 INCH, PLASTIC, SDIP-32
文件頁數(shù)： 91/133頁
文件大?。?/td> 2615K
代理商： ST72141K2B3/XXX
Obsolete
Product(s)
- Obsolete
Product(s)
ST72141K2
60/133
MOTOR CONTROLLER (Cont’d)
8.1.4.3 PWM Manager
The PWM manager controls the motor via the six
output channels in voltage mode or current mode
depending on the V0C1 bit in the MCRA register.
A block diagram of this part is given in Figure 37.
Voltage Mode
In Voltage mode (V0C1 bit = ”0”), the PWM is gen-
erated by the 16-bit A Timer.
Its duty cycle is programmed by software (refer to
the chapter on the 16-bit Timer) as required by the
application (speed regulation for example).
The current comparator is used for safety purpos-
es as a current limitation. For this feature, the de-
tected current must be present on the MCCFI pin
and the current limitation must be present on pin
OCP1A. This current limitation is fixed by a voltage
reference depending on the maximum current ac-
ceptable for the motor. This current limitation is
generated with the VDD voltage by means of an
external divider but can also be adjusted with an
external reference voltage (
≤3.7 V). The external
components are adjusted by the user depending
on the application needs. In Voltage mode, it is
mandatory to set a current limitation.
In sensorless mode the BEMF zero crossing is
done during the PWM off time.
The PWM signal is directed to the channel manag-
er that connects it to the programmed outputs
(See Figure 39).
Current Mode
In current mode, the PWM output signal is gener-
ated by a combination of the output of the meas-
urement window generator (see Figure 38) and
the output of the current comparator, and is direct-
ed to the output channel manager as well (Figure
The current reference is provided to the compara-
tor by the PWM output of the 16-bit Timer (0.25%
accuracy), filtered through a RC filter (external ca-
pacitor on pin OCP1A and an internal voltage di-
vider 30K and 70K).
The detected current input must be present on the
MCCFI pin.
To avoid spurious commutations due to parasitic
noise after switching on the PWM, a 2.5-s filter
can be applied on the comparator output by set-
ting the CFF bit in the MCRB register.
The On state of the resulting PWM starts at the
end of the measurement window (rising edge),
and ends either at the beginning of the next meas-
urement window (falling edge), or when the cur-
rent level is reached.
Figure 37. Current Feedback
MCCFI
2.5-
μs Filter
VCREF
R1
R2
16-bit Timer - PWM
OCP1A
CEXT
Common Mode = VDD - (1,4...1,0)V
VCREF MAX = VDD - 1,3 V
Power down mode
To Phase State
V0C1 bit
CFF bit
Sampling frequency
+
-
Control
MCRA Register
MCRA
(V)
R1ext
R2ext
VDD
(V)
(I)
Register
LEGEND:
(I): Current mode
(V): Voltage mode
相關(guān)PDF資料
PDF描述
ST72311N4T6/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72311J2B6/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42
ST72311N2T3/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72321BAR7T6 MICROCONTROLLER, QFP64
ST72321BR7T3 MICROCONTROLLER, QFP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST72141K2B6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
ST72141K2M1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
ST72141K2M3 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
ST72141K2M3/XXX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
ST72141K2M6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*