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參數資料
| 型號： | L6208N |
| 廠商： | 意法半導體 |
| 英文描述： | FULLY INTEGRATED STEPPER MOTOR DRIVER |
| 中文描述： | 完全集成的步進電機驅動器 |
| 文件頁數： | 11/27頁 |
| 文件大?。?/td> | 453K |
| 代理商： | L6208N |
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11/27
L6208
PWM CURRENT CONTROL
The L6208 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 10. As the current in
the motor 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 (VREF
A
or VREF
B
) the sense
comparator triggers the monostable switching the bridge off. The power MOS remain off for the time set by the
monostable and the motor current recirculates as defined by the selected decay mode, described in the next
section. When the monostable times out the bridge will again turn on. Since the internal dead time, used to pre-
vent 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 10. PWM Current Controller Simplified Schematic
Figure 11 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. More details regarding the Synchronous Rectification and
the output stage configuration are included in the next section.
Immediately after the Power MOS turns on, a high peak current flows through the sensing resistor due to the
reverse recovery of the freewheeling diodes. The L6208 provides a 1
μ
s Blanking Time t
BLANK
that inhibits the
comparator output so that this current spike cannot prematurely re-trigger the monostable.
DRIVERS
+
DEAD TIME
S
Q
R
DRIVERS
+
DEAD TIME
2H
1H
2L
1L
OUT2A(or B)
SENSEA(or B)
RSENSE
D01IN1332
RCA(or B)
R
OFF
C
OFF
VREFA(or B)
IOUT
OUT1A(or B)
+
-
+
-
1
μ
s
5mA
BLANKER
SENSE
COMPARATOR
COMPARATOR
OUTPUT
MONOSTABLE
SET
2.5V
5V
FROM THE
LOW-SIDE
GATE DRIVERS
2 PHASE
STEPPER MOTOR
BLANKING TIME
MONOSTABLE
VS
A
(or
B
)
TO GATE LOGIC
(0)
(1)
相關PDF資料 |
PDF描述 |
|---|---|
| L6208PD | FULLY INTEGRATED STEPPER MOTOR DRIVER |
| L6210 | DUAL SCHOTTKY DIODE BRIDGE |
| L6213 | SOLENOID DRIVER SWITCH MODE POWER SUPPLY |
| L6220N | Quad Darlington Switches(四通道達林頓晶體管開關) |
| L6220 | Quad Darlington Switches(四通道達林頓晶體管開關) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| L6208PD | 功能描述:馬達/運動/點火控制器和驅動器 DMOS Stepper Motor RoHS:否 制造商:STMicroelectronics 產品: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 |
| L6208PD013TR | 功能描述:馬達/運動/點火控制器和驅動器 DMOS Stepper Motor RoHS:否 制造商:STMicroelectronics 產品: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 |
| L6208Q | 功能描述:馬達/運動/點火控制器和驅動器 DMOS Driver Bipolar 5.6A 100kHz 8 to 52V RoHS:否 制造商:STMicroelectronics 產品: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 |
| L6208QTR | 功能描述:馬達/運動/點火控制器和驅動器 DMOS Dual Full Bridge Driver 5.6A RoHS:否 制造商:STMicroelectronics 產品: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 |
| L620C | 制造商:Pass & Seymour/Legrand 功能描述:Connector, Turnlok 3 Wire Ground, IP20, 20A, 250V, Black Back, White Front Body 制造商:Pass & Seymour/Legrand 功能描述:CONNECTOR POWER ENTRY RECEPTACLE 20A 制造商:Pass & Seymour/Legrand 功能描述:CONNECTOR, POWER ENTRY, RECEPTACLE, 20A 制造商:Pass & Seymour/Legrand 功能描述:CONNECTOR, POWER ENTRY, RECEPTACLE, 20A; Connector Type:Power Entry; Series:Turnlok; Current Rating:20A; Connector Color:Black / White; Connector Body Material:Nylon (Polyamide); Voltage Rating VAC:125V; Connector Mounting:Cable 制造商:Hubbell Premise Wiring 功能描述:Conn Power PL 2Power/1Ground POS Solder ST Panel Mount 3 Terminal 1 Port 制造商:Hubbell Wiring Device-Kellems 功能描述:LKG CONN, 20A 250V, HUB PRO, L6-20R |
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