參數(shù)資料
型號(hào)： L6227N
廠商： STMICROELECTRONICS
元件分類(lèi)： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, 2.8 A, PDIP24
封裝： POWER, DIP-24
文件頁(yè)數(shù)： 22/22頁(yè)
文件大?。?/td> 389K
代理商： L6227N
9/22
L6227
TRUTH TABLE
X
= Don't care
High Z
= High Impedance Output
GND (Vs)
= GND during Ton, Vs during Toff
(*) Valid only in case of load connected between OUT1 and OUT2
PWM CURRENT CONTROL
The L6227 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 7. As the current in
the load 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 com-
parator triggers the monostable switching the low-side MOS off. The low-side MOS remain off for the time set
by the monostable and the motor current recirculates in the upper path. 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 is the sum of the monostable time plus the dead time.
Figure 7. PWM Current Controller Simplified Schematic
Figure 8 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. Immediately after the low-side Power MOS turns on, a
high peak current flows through the sensing resistor due to the reverse recovery of the freewheeling diodes. The
L6227 provides a 1
s Blanking Time tBLANK that inhibits the comparator output so that this current spike cannot
prematurely re-trigger the monostable.
INPUTS
OUTPUTS
Description (*)
EN
IN1
IN2
OUT1
OUT2
L
X
High Z
Disable
H
L
GND
Brake Mode (Lower Path)
H
L
Vs
GND (Vs)
Forward
H
L
H
GND (Vs)
Vs
Reverse
H
Vs
Brake Mode (Upper Path)
DRIVERS
+
DEAD TIME
S
Q
R
DRIVERS
+
DEAD TIME
2H
1H
2L
1L
OUT2A(or B)
SENSEA(or B)
RSENSE
D02IN1352
RCA(or B)
R
C
VREFA(or B)
IOUT
OUT1A(or B)
+
-
1
s
5mA
BLANKER
SENSE
COMPARATOR
OUTPUT
MONOSTABLE
RESET
2.5V
5V
FROM THE
LOW-SIDE
GATE DRIVERS
LOADA
(or B)
BLANKING TIME
MONOSTABLE
VSA (or B)
TO GATE LOGIC
(0)
(1)
相關(guān)PDF資料
PDF描述
L6228Q STEPPER MOTOR CONTROLLER, 2.8 A, QCC32
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6227PD 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Dual Full Bridge RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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
L6227PDTR 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Dual Full Bridge RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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
L6227Q 功能描述:功率驅(qū)動(dòng)器IC DMOS DUAL FULL Bridge w/ PWM RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類(lèi)型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L6227Q_09 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:DMOS dual full bridge driver with PWM current controller
L6227QTR 功能描述:功率驅(qū)動(dòng)器IC DMOS DUAL FULL Bridge w/ PWM RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類(lèi)型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
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