參數(shù)資料
型號(hào)： MM908E625
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： Integrated Quad Half H-Bridge with Power Supply, Embedded MCU, and LIN Serial Communication(集成四半H橋，帶電源、嵌入式MCU和LIN串行通信功能)
中文描述： 綜合四半僅符合電源橋，嵌入式微控制器和LIN串行通信（集成四半魔橋，帶電源，嵌入式微控制器和林串行通信功能）
文件頁(yè)數(shù)： 31/40頁(yè)
文件大小： 595K
代理商： MM908E625
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
908E625
31
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 17
).
Figure 17. 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 18
,
page 32).
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
MM908E625ACDWB 功能描述:8位微控制器 -MCU 32 Bit 8MHz 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
MM908E625ACDWB/R2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Integrated Quad Half H-Bridge with Power Supply, Embedded MCU, and LIN Serial Communication
MM908E625ACEK 功能描述:8位微控制器 -MCU Quad Half H-Bridge with P/S, HC08, LIN 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
MM908E625ACPEK 功能描述:8位微控制器 -MCU R0 HI-BRDG EMBED MCU LIN 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
MM908E626 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
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