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參數(shù)資料
| 型號(hào)： | 908E626 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Integrated Stepper Motor Driver with Embedded MCU and LIN Serial Communication |
| 中文描述： | 集成的步進(jìn)電機(jī)驅(qū)動(dòng)器，帶有嵌入式微控制器和LIN串行通信 |
| 文件頁數(shù)： | 25/32頁 |
| 文件大?。?/td> | 303K |
| 代理商： | 908E626 |
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MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
908E626
25
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
).
Figure 11. 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 12
,
page 26).
Coil2 Current
Coil1 Current
Current in
VSUP Line
FGEN Input
(MCU PWM
Signal)
Coil1
…..
Coil2
…..
HB1
HB2
HB3
HB4
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 908E626_08 | 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 |
| 908E626_09 | 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 |
| 908E626_12 | 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 |
| 908-H003M | 制造商:Farnell / Duratool 功能描述:PICKUP TOOL NUT-LAUNCHER 制造商:Farnell / Duratool 功能描述:PICKUP TOOL, NUT-LAUNCHER 制造商:Farnell / Duratool 功能描述:PICKUP TOOL, NUT-LAUNCHER; Lifter Type:Mechanical; Length:122mm; External Diameter:7mm ;RoHS Compliant: NA |
| 908M 01 2417 HR | 制造商:Taunuslicht 功能描述: |
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