- 您现在的位置：买卖IC网 > PDF目录69003 > L6208D (STMICROELECTRONICS) STEPPER MOTOR CONTROLLER, 5.6 A, PDSO24 PDF资料下载
参数资料
| 型号： | L6208D |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 运动控制电子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 5.6 A, PDSO24 |
| 封装： | SO-24 |
| 文件页数： | 3/27页 |
| 文件大小： | 462K |
| 代理商： | L6208D |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页
11/27
L6208
PWM CURRENT CONTROL
The L6208 includes a constant off time PWM current controller for each of the two bridges. The current control
circuit senses the bridge current by sensing the voltage drop across an external sense resistor connected be-
tween the source of the two lower power MOS transistors and ground, as shown in Figure 10. As the current in
the motor builds up the voltage across the sense resistor increases proportionally. When the voltage drop
across the sense resistor becomes greater than the voltage at the reference input (VREFA or VREFB) the sense
comparator triggers the monostable switching the bridge off. The power MOS remain off for the time set by the
monostable and the motor current recirculates as defined by the selected decay mode, described in the next
section. When the monostable times out the bridge will again turn on. Since the internal dead time, used to pre-
vent cross conduction in the bridge, delays the turn on of the power MOS, the effective off time is the sum of the
monostable time plus the dead time.
Figure 10. PWM Current Controller Simplified Schematic
Figure 11 shows the typical operating waveforms of the output current, the voltage drop across the sensing re-
sistor, the RC pin voltage and the status of the bridge. More details regarding the Synchronous Rectification and
the output stage configuration are included in the next section.
Immediately after the Power MOS turns on, a high peak current flows through the sensing resistor due to the
reverse recovery of the freewheeling diodes. The L6208 provides a 1
s Blanking Time tBLANK that inhibits the
comparator output so that this current spike cannot prematurely re-trigger the monostable.
DRIVERS
+
DEAD TIME
S
Q
R
DRIVERS
+
DEAD TIME
2H
1H
2L
1L
OUT2A(or B)
SENSEA(or B)
RSENSE
D01IN1332
RCA(or B)
ROFF
COFF
VREFA(or B)
IOUT
OUT1A(or B)
+
-
1
s
5mA
BLANKER
SENSE
COMPARATOR
OUTPUT
MONOSTABLE
SET
2.5V
5V
FROM THE
LOW-SIDE
GATE DRIVERS
2 PHASE
STEPPER MOTOR
BLANKING TIME
MONOSTABLE
VSA (or B)
TO GATE LOGIC
(0)
(1)
相关PDF资料 |
PDF描述 |
|---|---|
| L6208PD | STEPPER MOTOR CONTROLLER, 5.6 A, PDSO36 |
| L6219DS | STEPPER MOTOR CONTROLLER, 1 A, PDSO24 |
| L6219DS013TR | STEPPER MOTOR CONTROLLER, 1 A, PDSO24 |
| L6227Q | BRUSH DC MOTOR CONTROLLER, 2.8 A, QCC32 |
| L6228D | STEPPER MOTOR CONTROLLER, 2.8 A, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6208D | 制造商:STMicroelectronics 功能描述:Supply Voltage Max.:52V |
| L6208D013TR | 功能描述:马达/运动/点火控制器和驱动器 DMOS Stepper Motor 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 |
| L6208D013TR-CUT TAPE | 制造商:ST 功能描述:L6208 Series Dual 52 V 5.6 A DMOS Driver for Bipolar Stepper Motor - SOIC-24 |
| L6208N | 功能描述:马达/运动/点火控制器和驱动器 DMOS Stepper Motor 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 |
| L6208PD | 功能描述:马达/运动/点火控制器和驱动器 DMOS Stepper Motor 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 |
发布紧急采购，3分钟左右您将得到回复。