參數(shù)資料
型號(hào)： MC34920
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： 2.8 Ohm(Typ) Quad H-Bridge Motor Driver(2.8歐（典型值）四H橋電機(jī)驅(qū)動(dòng)器)
中文描述： 2.8歐姆（典型值）四H橋電機(jī)驅(qū)動(dòng)器（2.8歐（典型值）四魔橋電機(jī)驅(qū)動(dòng)器）
文件頁(yè)數(shù)： 23/28頁(yè)
文件大?。?/td> 813K
代理商： MC34920
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
34920
23
Figure 6. Simplified DC Application Diagram Showing 1 of 2 Motor Drive Circuits
Bipolar Current Regulated Step Motor Drive System
The drive circuitry is powered by the V
VB+
supply voltage.
For example, with external current sense resistors of 0.910
±1%, the drive circuitry provides drive for a bipolar step motor
at current levels of approximately 183 mA, 367 mA, and
550 mA. Current mode operation supports quarter stepping.
This drive enters the fast current decay mode when both the
CURR_I0_PHASEX and CURR_I1_PHASEX inputs are set to
the logic [1] level. In fast current decay mode, any residual
motor winding current is forced into the V
VB+
supply rail when
going to a zero current state from a non-zero current level. This
forces the motor winding current toward zero as quickly as
possible.
For each of the two H-bridge drivers, controlled crossover
delay, a blanking period, and internal overtemperature sensing
are provided. The crossover delay is controlled to provide
sufficient time for cross-conduction suppression. At no time will
both the upper and lower output device on the same side of the
H-bridge be allowed to conduct simultaneously. Also, following
a turn-on event a blanking period is included to prevent false
turn-offs owing to the initial turn-on current spike, which results
from motor circuit capacitance.
This drive has internal overtemperature sensing for
protection. During an overtemperature event, when the device
T
J
is at or above T
J(SHUTDOWN)
, the internal thermal protection
circuit disables the drive outputs by driving all outputs to the
zero current state until the device temperatures have dropped
below the lower thermal threshold temperature T
J(ENABLE)
, at
which time the driver is re-enabled.
Note
During power-on the step motor driver circuit inhibits
its outputs when V
VB+
is at 4.0 V or greater until
RESET
is
released. Likewise, during power-down the step motor driver
circuit inhibits its outputs from the point when
RESET
goes low
until V
VB+
has dropped below 4.0 V.
DC Motor Drive System
This drive circuitry provides bi-directional drive to a DC motor
via two inputs, DCM_PWM (an external terminal, CMOS-
compatible input) and DRx_DIR_DCM (a bit in the serial input
port; refer to
Tables 5
through
7
, pp. 17–19). This drive is
powered from VB+. The DC motor control circuitry uses voltage
mode control.
To drive a DC motor the 34920 outputs DR2A1 and DR2A2
must be connected together externally, then connected to the
DC motor “+” lead. Likewise, the 34920 outputs DR2B1 and
DR2B2 must be connected together externally, then connected
to the DC motor “-“ lead (see
Figure 6
).
This drive provides internal overtemperature sensing for
protection. During an overtemperature event, when the device
T
J
is at or above T
J(SHUTDOWN)
, the internal thermal protection
DR2_MODE
VB+
Phase A H-Bridge
Phase B H-Bridge
DR2_DIR_DCM
SDR2_CURR_I0 PHASEA
SDR2_CURR_I1 PHASEA
SDR2_DIR_PH A
DR2A1
DR2A2
DR2B2
SDR2_DIR_PH_B
SDR2_CURR_I1_PHASEB
SDR2_CURR_I0_PHASEB
DR2B1
DR2PWM
DC
Motor
34920
+
-
DR2
F
Freescale Semiconductor, Inc.
Go to: www.freescale.com
n
.
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MC34920EI 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Motor Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MC34920EIR2 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 STD KATANA PB FREE RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MC34921 制造商:SPC Multicomp 功能描述:HEADER R/ANGLE 5WAY 制造商:SPC Multicomp 功能描述:HEADER, R/ANGLE, 5WAY 制造商:SPC Multicomp 功能描述:WIRE-BOARD CONNECTOR, RCPT, 5POS, 4.2MM; Series:2266(5566)S; Pitch Spacing:4.2mm; Contact Termination:Through Hole Right Angle; No. of Contacts:5; No. of Rows:1; Connector Mounting:PCB; Gender:Receptacle; Contact Material:Brass ;RoHS Compliant: Yes
MC34921AE 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DUAL PWM DC MOTOR DRIVE RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
MC34921AER2 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DUAL PWM DC MOTOR DRIVE RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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