参数资料
型号: L6460TR
厂商: STMICROELECTRONICS
元件分类: 运动控制电子
英文描述: STEPPER MOTOR CONTROLLER, PQFP64
封装: 10 X 10 MM, 1 MM HEIGHT, ROHS COMPLIANT, TQFP-64
文件页数: 100/139页
文件大小: 3837K
代理商: L6460TR
L6460
Power bridges
Doc ID 17713 Rev 1
63/139
14.1.4
Switch configuration
Each bridge can be configured to be used as 2 independent switches that connects the
output to supply or to ground. It is also possible to parallel the two switches and use them as
a single super switch.
All resulting switches will behave according to the following truth table.
Note:
When “low power mode” bit is active the bridge will reduce its biasing thus contributing to the
whole power saving.
When a current limit event occurs this event will be latched and the bridge will remain in high
impedance state for the toff time.
14.1.5
Bipolar stepper configuration
The bridges 3 and 4 can be configured to be used as a micro-stepping, bidirectional driver
for bipolar stepper motors.
The primary features of the driver are the following:
Internal PWM current control.
Micro stepping.
Fast, mixed and slow current decay modes.
Each H-bridge is controlled with a fixed and selectable off-time PWM current control circuit
that limits the load current to a value set by choosing VSTEPREF voltage by means of the
internal DAC and an the external RSENSE value.
The max current level could be calculated using the formula:
IMAX=VSTEPREF/RSENSE
To obtain the best current profile, the user can choose three different current decay modes:
slow, fast and mixed. Initially, during Ton, a diagonal pair of source and sink power MOS is
enabled and current flows through the motor winding and the sense resistor. When the
voltage across the sense resistor reaches the programmed DAC output voltage, the control
logic will change the status of the bridge according to the selected decay mode (slow, fast or
mixed). In slow decay mode the current is recirculated through the path including both high
Table 20.
Switch truth table
TSD
nReset
Low
power
mode
Enable
Current
limit
MtrXCtrl
SideA/B
PWM
OUT
1
XXX
Z
0
XX
XXX
Z
011
X
Z
010
0
X
Z
010
100
X
Z
010
101
01
010
101
10
010
11
X
Z
相关PDF资料
PDF描述
L6515 BRUSH DC MOTOR CONTROLLER, 0.01 A, PQCC44
L6560AD 0.7 A POWER FACTOR CONTROLLER, PDSO8
L6560AD013TR 0.7 A POWER FACTOR CONTROLLER, PDSO8
L6560D013TR 0.7 A POWER FACTOR CONTROLLER, PDSO8
L6562ATN SWITCHING CONTROLLER, PDIP8
相关代理商/技术参数
参数描述
L6470 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:dSPIN fully integrated microstepping motor driver with motion engine and SPI
L64702QC-33 制造商:未知厂家 制造商全称:未知厂家 功能描述:
L64704 制造商:未知厂家 制造商全称:未知厂家 功能描述:L64704 Satellite Decoder technical manual 5/97
L6470H 功能描述:马达/运动/点火控制器和驱动器 8 - 45V 7.0A 1/128 Microstepping SPI RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
L6470HTR 功能描述:马达/运动/点火控制器和驱动器 8 - 45V 7.0A Bipolar dSPIN MicroStepping RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube