参数资料
| 型号： | LV8773-E |
| 厂商： | ON Semiconductor |
| 文件页数： | 7/14页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DVR PWM CC 2CH 28-DIP |
| 标准包装： | 20 |
| 系列： | * |
LV8773
Description of operation
(1) Chip enable function
This IC is switched between standby and operating mode by setting the ST pin. In standby mode, the IC is set to
power-save mode and all logic is reset. In addition, the internal regulator circuit and charge pump circuit do not
operate in standby mode.
ST
Low or Open
High
Mode
Standby mode
Operating mode
Internal regulator
Standby
Operating
Charge pump
Standby
Operating
(2) Output control logic
input
output
DC11(21)
L
H
L
H
DC12(22)
L
L
H
H
OUT1(2)A
OFF
H
L
L
OUT1(2)B
OFF
L
H
L
mode
Stand-by
CW ( Forward )
CCW ( reverse )
brake
(3) Blanking period
If, when exercising PWM constant-current chopping control over the motor current, the mode is switched from decay
to charge, the recovery current of the parasitic diode may flow to the current sensing resistance, causing noise to be
carried on the current sensing resistance pin, and this may result in erroneous detection. To prevent this erroneous
detection, a blanking period is provided to prevent the noise occurring during mode switching from being received.
During this period, the mode is not switched from charge to decay even if noise is carried on the current sensing
resistance pin.
This IC is the blanking time is fixed at approximately 2 μ s.
(4) Chopping frequency setting
For constant-current control, this IC performs chopping operations at the frequency determined by the capacitor
(Cchop) connected between the CHOP pin and GND.
The chopping frequency is set as shown below by the capacitor (Cchop) connected between the CHOP pin and GND.
Fchop = Ichop/ (Cchop × Vtchop × 2) (Hz)
Ichop : Capacitor charge/discharge current, typ 10 μ A
Vtchop : Charge/discharge hysteresis voltage (Vtup-Vtdown), typ 0.5V
For instance, when Cchop is 220pF, the chopping frequency will be as follows :
Fchop = 10 μ A/ (220pF × 0.5V × 2) = 45.4kHz
No.A1961-7/14
相关PDF资料 |
PDF描述 |
|---|---|
| M14BCK | CONN BUTT UNINSUL 16-14 AWG |
| M20-6103205 | CONN HDR FMALE .100" 64POS AU |
| M20-6113205 | CONN HDR FMALE .100" 64POS AU |
| M20-6153205 | CONN HDR FMALE .100" 64POS AU |
| M63954P | HVIC DRVR HB 600V 0.5A 16-DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LV8773-E | 制造商:ON Semiconductor 功能描述:OPTOCOUPLERS; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No ;RoHS Compliant: No |
| LV8773GEVB | 功能描述:电源管理IC开发工具 EVM FOR LV8773 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| LV8773Z-E | 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 |
| LV8800C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| LV8800V | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Bi-CMOS IC For Notebook PC Fan Motor Driver |
发布紧急采购，3分钟左右您将得到回复。