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參數(shù)資料
| 型號： | L6229PDTR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR |
| 中文描述： | DMOS的驅(qū)動三相無刷直流電動機 |
| 文件頁數(shù)： | 9/25頁 |
| 文件大?。?/td> | 582K |
| 代理商： | L6229PDTR |
9/25
L6229
Figure 7. Logic Input Internal Structure
Figure 8. Pin EN Open Collector Driving
Figure 9. Pin EN Push-Pull Driving
3.3 PWM CURRENT CONTROL
The L6229 includes a constant off time PWM Current Controller. The current control circuit senses the bridge
current by sensing the voltage drop across an external sense resistor connected between the source of the
three lower power MOS transistors and ground, as shown in Figure 10. As the current in the motor increases
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 pin VREF the sense comparator triggers the
monostable switching the bridge off. The power MOS remain off for the time set by the monostable and the mo-
tor current recirculates around the upper half of the bridge in Slow Decay Mode as described in the next section.
When the monostable times out, the bridge will again turn on. Since the internal dead time, used to prevent
cross conduction in the bridge, delays the turn on of the power MOS, the effective Off Time t
OFF
is the sum of
the monostable time plus the dead time.
Figure 11 shows the typical operating waveforms of the output current, the voltage drop across the sensing re-
sistor, the pin RC 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 turn on, a high peak current flows through the sense resistor due to the re-
5V
D01IN1329
ESD
PROTECTION
5V
5V
OPEN
COLLECTOR
OUTPUT
R
EN
C
EN
EN
DIAG
D02IN1378
ESD
PROTECTION
5V
PUSH-PULL
OUTPUT
R
EN
C
EN
EN
D02IN1379
DIAG
ESD
PROTECTION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6232A | SPINDLE DRIVER |
| L6232B | SPINDLE DRIVER |
| L6232E | Spindle Driver(主軸驅(qū)動器) |
| L6234 | Three Phase Motor Driver(三相電機驅(qū)動器) |
| L6237 | 5V Spindle Motor Driver(5V主軸電機驅(qū)動器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6229Q | 功能描述:馬達/運動/點火控制器和驅(qū)動器 DMOS Driver for 3-phase DC motor 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 |
| L6229QTR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 DMOS driver 3-phrase DC motor 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 |
| L622C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:THYRISTOR MODULE|BRIDGE|HALF-CNTLD|CA|240V V(RRM)|46A I(T) |
| L622-DBC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:L series PRTDs, type L 622 DBC are designed for large volume applications where longterm stability |
| L622DY | 制造商:VCC 功能描述:LED CIRCUIT BOARD INDICATOR |
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