- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄43899 > L6228Q (STMICROELECTRONICS) STEPPER MOTOR CONTROLLER, 2.8 A, QCC32 PDF資料下載
參數(shù)資料
| 型號： | L6228Q |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 2.8 A, QCC32 |
| 封裝： | 5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, VFQFPN-32 |
| 文件頁數(shù)： | 8/32頁 |
| 文件大?。?/td> | 491K |
| 代理商： | L6228Q |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當(dāng)前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
Circuit description
L6228Q
16/32
Doc ID 14321 Rev 4
Figure 15.
Area where tON can vary maintaining the PWM regulation
4.4
Decay modes
The CONTROL input is used to select the behavior of the bridge during the off time. When
the CONTROL pin is low, the fast decay mode is selected and both transistors in the bridge
are switched off during the off time. When the CONTROL pin is high, the slow decay mode
is selected and only the low side transistor of the bridge is switched off during the off time.
Figure 16 shows the operation of the bridge in the fast decay mode. At the start of the off
time, both of the power MOS are switched off and the current recirculates through the two
opposite free wheeling diodes. The current decays with a high dI/dt since the voltage across
the coil is essentially the power supply voltage. After the dead time, the lower power MOS in
parallel with the conducting diode is turned on in synchronous rectification mode. In
applications where the motor current is low it is possible that the current can decay
completely to zero during the off time. At this point if both of the power MOS were operating
in the synchronous rectification mode it would then be possible for the current to build in the
opposite direction. To prevent this only the lower power MOS is operated in synchronous
rectification mode. This operation is called quasi-synchronous rectification mode. When the
monostable times out, the power MOS are turned on again after some delay set by the dead
time to prevent cross conduction.
Figure 17 shows the operation of the bridge in the slow decay mode. At the start of the off
time, the lower power MOS is switched off and the current recirculates around the upper half
of the bridge. Since the voltage across the coil is low, the current decays slowly. After the
dead time the upper power MOS is operated in the synchronous rectification mode. When
the monostable times out, the lower power MOS is turned on again after some delay set by
the dead time to prevent cross conduction.
0.1
1
10
100
1
10
100
Coff [nF]
ton(
m
in
)[u
s]
2.5μs (typ. value)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6228QTR | STEPPER MOTOR CONTROLLER, QCC32 |
| L6229D | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO24 |
| L6229N | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDIP24 |
| L6229PDTR | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO36 |
| L6235D013TR | BRUSHLESS DC MOTOR CONTROLLER, 5.6 A, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6228Q_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DMOS driver for bipolar stepper motor |
| L6228QTR | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 DMOS Dual Full Bridge w/ PWM 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 |
| L6229 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR |
| L6229D | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 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 |
| L6229DP | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。