- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄369714 > L6223A PDF資料下載
參數(shù)資料
| 型號： | L6223A |
| 文件頁數(shù)： | 7/33頁 |
| 文件大?。?/td> | 1335K |
| 代理商： | L6223A |
第1頁第2頁第3頁第4頁第5頁第6頁當前第7頁第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頁第33頁
BLOCKDIAGRAM DESCRIPTION
Input Logic
Decodes the input signals IN1, IN2, IN3, IN4,
DA/OPLO, and DA/CLEV for programming the
device and driving the motor. The six inputs are
CMOS compatible and can interface directly with
a microprocessor.
PredriverStages
Drive the gates of the five DMOS. They interface
the power section with the logic section. The in-
ternal inhibit, when activated, disables the power
section. The reset initializes the shift register and
disablesthe powersection.
6 bit Shift Register
Internal memory which defines the working con-
figuration of the device along with the input sig-
nals.
Current Control
When selected with the input DA/OPLO = L
(Closed Loop), it will maintain a constant output
current level by chopping. The value of the refer-
ence voltage, which is compared to the sense
voltage, is given by the Ref Block. The chopping
frequency dependson bit C4.
Ref Block
Defines the current chopping level according to
bits C0 and C1 and the input signals.
Fixed on Time
When selected with DA/OPLO = H, it will define
according to bitsC2 and C3 the choppingduty cy-
cle for the Open Loop mode. The chopping fre-
quencyis fixed.
Oscillator
Provides the clock setting the S/R FLIP-FLOP
that turn ON/OFF the upper DMOS (Fig. 22). The
higher operative chopping frequency is defined by
the external RC network (typically 20KHz). At the
phase change a syncronousclock pulse is gener-
ated
Reset Logic Block
Generates the reset signal for the logic at power
on and disables the outputs. The reset can also
be generated externally by setting the RC pin to
less that 0.9V.
Thermal Protection
Disables the power section in case of over tem-
peraturecondition.
ChargePump
Along with an external bootstrap capacitor con-
nected between the BSTP and COM pins, this
block generates the internal over voltage required
to drive the upperDMOS on.
Power Output
Driven by the Predriver Stages, it supplies the
power for the motorwindings.
CIRCUIT OPERATION
The five N DMOS transistors of the output stage
drive the unipolar motor windings, controlling the
current by chopping. In particular, the four Low
side (OUT1, OUT2, OUT3, OUT4) switch the
phase configurations, and the High side DMOS
(COM) is for choppingcontrol.
For this transistor a charge pump circuit provides
its necessary gate drive over voltage.
The microprocessor outputs are interfaced with
the L6223A output stages through the input logic
block. This block also protects the device from mi-
croprocessor output errors and failures from the
power section back to the microprocessor out-
puts. The six digital inputs IN1, IN2, IN3, IN4,
DA/CLEV, DA/OPLO, are decoded for motor con-
trol and rotation when in ”O(jiān)perating mode” and
used for the internal six Bit memory programming
when in ”ProgrammingMode”.
Table 1 shows the condition that selects these
device status. The programming of theinternal six
bit memory sets operativeconditions such as:
PWM CURRENT LEVELS
CHOPPINGFREQUENCY
LOGIC IN/OUT DECONDING
This memory works like a shift register. Each bit is
introduced serially by decodingthe IN1, IN2, IN3,
IN4 low status for the internalclock pulse genera-
tion and by the DA/CLEV DA/OPLO, inputs in
exor, as data in.
Figure 7 showsthe six bit meaning.
In theoperating mode two differentinput drive are
possible. In SIMPLIFIEDOPERATING MODE the
IC needsfew logic wire for the motor rotation, but
only the full step driving sequence can be per-
formed.
L6223A
7/33
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6258A | Stepper Motor Controller/Driver |
| L6258EP | PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER |
| L6258 | PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER |
| L6261 | Servo/Spindle Motor Controller/Driver |
| L6372 | OCTAL INDUSTRIAL INPUT INTERFACE(253.91 k) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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 |
| L6225N | 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。