參數(shù)資料
型號(hào)： L6228Q
廠商： STMICROELECTRONICS
元件分類： 運(yùn)動(dòng)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(yè)數(shù)： 11/32頁(yè)
文件大?。?/td> 491K
代理商： L6228Q
L6228Q
Circuit description
Doc ID 14321 Rev 4
19/32
Figure 20.
Wave drive mode
4.9
Non-dissipative overcurrent protection
The L6228Q integrates an overcurrent detection circuit (OCD) for full protection. This circuit
provides protection against a short circuit to ground or between two phases of the bridge.
With this internal over current detection, the external current sense resistor normally used
and its associated power dissipation are eliminated. Figure 21 shows a simplified schematic
of the overcurrent detection circuit.
To implement the over current detection, a sensing element that delivers a small but precise
fraction of the output current is implemented with each high side power MOS. Since this
current is a small fraction of the output current there is very little additional power
dissipation. This current is compared with an internal reference current IREF. When the
output current reaches the detection threshold (typically 2.8 A) the OCD comparator signals
a fault condition. When a fault condition is detected, the EN pin is pulled below the turn off
threshold (1.3 V typical) by an internal open drain MOS with a pull down capability of 4 mA.
By using an external R-C on the EN pin, the off time before recovering normal operation can
be easily programmed by means of the accurate thresholds of the logic inputs.
2
4
2
D01IN1321
4682468
6
8
IOUTA
IOUTB
CLOCK
3
5
1
7
Start Up or Reset
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(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)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(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)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(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)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
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