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參數(shù)資料
| 型號： | L6223 |
| 廠商： | 意法半導體 |
| 英文描述： | DMOS Programmable High Speed Unipolar Stepper Motor Driver(高速單極步進電機驅(qū)動器) |
| 中文描述： | DMOS的可編程高速單極性步進電機驅(qū)動器（高速單極步進電機驅(qū)動器） |
| 文件頁數(shù)： | 8/33頁 |
| 文件大?。?/td> | 1078K |
| 代理商： | L6223 |
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Device status
Bit C5
IN1
IN3
IN4
DA/CLEV
DA/OPLO
Simplified
mode
operating
L
Phase A
Driver
Phase B
Driver
Enable
Alternative
Current
Reduction
”LOW”
Current
Reductio
Active
”HIGH”
Open/Closed
Loop current
control
Full mode
operating
H
Phase A
Phase A
driver
Phase B
driver
Phase B
driver
Programming
mode
X
L
L
L
L
serial
data in
serial
data in
Table 1
Figure7:
InternalSix-Bit Shift Register Bit Functions
CIRCUIT OPERATION
(continued)
The FULL OPERATING MODE permits all the
driving possibilities.The 4 lowside DMOS transis-
tors are drived directly by the 4 inputs IN1, IN2,
IN3, IN4 which define directly the phases configu-
ration. The chopping of the motor current can be
in open loop or in close loop. When in open loop
(fixed on-time block) the DA/OPLO pin is High
and the motor current is not controlled but it
mostly depends from the bits C2 nd C3. When in
close loop the DA/OPLO is Low and the output
current is controlled at a constant value defined
by the internal reference and by the sensing re-
sistor value. The internal reference depends by
the programming bits C0, C1, and by the input
configurations.During the power on sequencethe
reset circuitry prevents current spikes disabling
the outputsand by resettingthe memory.
Power Section
The basic concept for the current control is ex-
plained by examining the winding pair phase A
(MA) in Figure 24. With Q5 = ON, Q2 = OFF the
current rises until R
S
I
P
equals the comparator
threshold value. The comparatoroutput resetsthe
F/F and Q5 switches off. In this condition the cur-
rent decay path begins as shown in Figure 25.
The current value becomes I
p
/2, according to the
double number of turns interested. In order to re-
duce the dissipation, Q2 is also driven on. Q5 re-
mains off (PWM off time) up to a new clock pulse
sets again the F/F. The winding current behaviour
is shown in Figure26.
Since during PWM off time the current value is
half that of the on time and since in a typical ap-
plication Toff >>Ton, the device dissipation is fur-
ther reduced.
The five DMOS transistors are connected to the
”predriver stages” block, that drives the DMOS
gates, and interfaces them to the internal input
logic. The ”charge pump” provides correct voltage
for Q5 UPPER DMOS gate drive by using the ex-
ternal bootstrapcapacitor.
ProgrammingMode
The Programming Mode is defined by the inputs
IN1=IN2=IN3=IN4=Low. When in PROGRAM-
MING MODE the outputs are disabled. The wave-
form shown in Fig. 8 represents one possible tim-
L6223
8/33
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|---|---|
| L6226 | DMOS DUAL FULL BRIDGE DRIVER |
| L6226D | DMOS DUAL FULL BRIDGE DRIVER |
| L6226N | DMOS DUAL FULL BRIDGE DRIVER |
| L6226PD | DMOS DUAL FULL BRIDGE DRIVER |
| L6228 | DMOS DRIVER FOR BIPOLAR STEPPER MOTOR |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L6223A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| L6225 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DMOS DUAL FULL BRIDGE DRIVER |
| L6225_03 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DMOS DUAL FULL BRIDGE DRIVER |
| L6225D | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Dual Full Bridge 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L6225DTR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Dual Full Bridge 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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