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參數(shù)資料
| 型號： | MM908E626AVEK |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | FLASH, 32 MHz, MICROCONTROLLER, PDSO54 |
| 封裝： | 5.10 X 10.30 MM, 0.65 MM PITCH, LEAD FREE, SOIC-54 |
| 文件頁數(shù)： | 20/43頁 |
| 文件大小： | 842K |
| 代理商： | MM908E626AVEK |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
27
908E626
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Offset Chopping
If bit OFC_EN in the H-bridge Control Register (HBCTL) is
set, HB1 and HB2 will continue to switch on the low side
MOSFETs with the rising edge of the FGEN signal and HB3
and HB4 will switch on the low side MOSFETs with the falling
edge on the FGEN input. In step motor applications, this
feature allows the reduction of EMI due to a reduction of the
di/dt (Figure 14).
Figure 14. Offset Chopping for Step Motor Control
HALF-BRIDGE CURRENT RECOPY
Each low side MOSFET has an additional sense output to
allow a current recopy feature. This sense source is internally
connected to a shunt resistor. The drop voltage is amplified
and switched to the analog multiplexer.
The factor for the current sense amplification can be
selected via bit CSA in the System Control Register.
CSA = 1: Low resolution selected (500 mA
measurement range).
CSA = 0: High resolution selected (2.5 A measurement
range).
HALF-BRIDGE BEMF GENERATION
The BEMF output is set to “1” if a recirculation current is
detected in any half-bridge. This recirculation current flows
via the two freewheeling diodes of the power MOSFETs. The
BEMF circuitry detects that and generates a HIGH on the
BEMF output as long as a recirculation current is detected.
This signal provides a flexible and reliable detection of stall in
step motor applications. For this the BEMF circuitry takes
advantage of the instability of the electrical and mechanical
behavior of a step motor when blocked. In addition the signal
can be used for open load detection (absence of this signal)
(see Figure 15).
Coil2 Current
Coil1 Current
Current in
VSUP Line
FGEN Input
(MCU PWM
Signal)
Coil1…..
Coil2…..
HB1
HB2
HB3
HB4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MM908E626AVPEK | 功能描述:8位微控制器 -MCU MCU + LIN + MOTOR DRIVER RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| MM908E626AVPEKR2 | 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| MM908E626R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Stepper Motor Driver with Embedded MCU and LIN Serial Communication |
| MM-90N | 功能描述:ANT MAGN MNT VEHIC 3.5"DIA 10'NF RoHS:是 類別:RF/IF 和 RFID >> RF 天線 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* |
| MM90R9F | 制造商:Ohmite Mfg Co 功能描述: |
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