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参数资料
| 型号： | LV8747T |
| 元件分类： | 稳压器 |
| 英文描述： | 1.75 A SWITCHING CONTROLLER, 150 kHz SWITCHING FREQ-MAX, PQFP64 |
| 封装： | 7 X 7 MM, TQFP-64 |
| 文件页数： | 6/21页 |
| 文件大小： | 228K |
| 代理商： | LV8747T |
LV8747T
No.A0695-14/21
Stepping Motor Driver OUT1/OUT2(OUT3/OUT4)
(1) Output control logic
Parallel input (Note)
Output
PS
PHA
OUTA
OUTB
Current direction
Low
*
Off
Standby
High
Low
High
OUTB
→OUTA
High
Low
OUTA
→OUTB
(Note) : Enter either “H” or “L” externally for the logic input pin. Never use the input pin in the OPEN state.
(2) Constant-current setting
I0 (Note)
I1 (Note)
Output current
High
IO = (VREF/5) /RNF
Low
High
IO = ((VREF/5) /RNF) × 2/3
High
Low
IO = ((VREF/5) /RNF) × 1/3
Low
IO = 0
(Note) : Enter either “H” or “L” externally for the logic input pin. Never use the input pin in the OPEN state.
Set current calculation method
The constant-current control setting of STM driver is determined as follows from the setting of VREF voltage, and I0
and I1, and resistor (RNF) connected between RNF and GND :
Iconst [A] = ((VREF [V] /5) /RNF [
]) × attenuation factor
(Example) For VREF = 1.5V, I0 = I1 = “H” and RNF = 1
;
Iconst = 1.5V/5/1
× 1 = 0.3A
(3) Setting the chopping frequency
For constant-current control, chopping operation is made with the frequency determined by the external resistor
(connected to the CHOP pin).
The chopping frequency to be set with the resistance connected to the CHOP pin (pin 39) is as shown below.
The recommended chopping frequency ranges from 30kHz to 120kHz.
0
40
80
60
20
140
120
100
040
30
50
60
70
20
10
80
CHOP resistance (k
)
Chopping
frequency
(kHz)
Chopping frequency
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LV8747TA | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:PWM Constant-Current Control Stepping Motor Driver and Switching Regulator Controller |
| LV8747TA-2H | 功能描述:马达/运动/点火控制器和驱动器 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 |
| LV8747TA-AE | 功能描述:马达/运动/点火控制器和驱动器 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 |
| LV8747TA-NH | 功能描述:马达/运动/点火控制器和驱动器 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 |
| LV8747T-TLM-E | 功能描述:马达/运动/点火控制器和驱动器 10-35V Step w SW-Reg 2chBrush Motor Dr 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 |
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