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參數資料
| 型號： | L9950XPTR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 10 A, PDSO36 |
| 封裝： | ROHS COMPLIANT, SSOP-36 |
| 文件頁數： | 15/39頁 |
| 文件大小： | 620K |
| 代理商： | L9950XPTR |
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Application information
L9950 - L9950XP
Doc ID 10311 Rev 10
3.9
Current monitor
The current monitor output sources a current image at the current monitor output which has
a fixed ratio (1/10000) of the instantaneous current of the selected highside driver. The bits
18 and 19 of the Input Data Register 0 control which of the outputs OUT1, OUT4, OUT5,
OUT6 and OUT11 will be multiplexed to the current monitor output. The current monitor
output allows a more precise analysis of the actual state of the load rather than the detection
of an open or overload condition. For example this can be used to detect the motor state
(starting, free running, stalled). Moreover, it is possible to regulate the power of the defroster
more precise by measuring the load current. The current monitor output is bidirectional (c.f.
PWM inputs).
3.10
PWM inputs
Each driver has a corresponding PWM enable bit which can be programmed by the SPI
interface. If the PWM enable bit is set, the output is controlled by the logically AND
combination of the PWM signal and the output control bit in Input Data Register. The outputs
OUT1-OUT8 and OUT11 are controlled by the PWM1 input and the outputs OUT9/10 are
controlled by the bidirectional input CM/PMW2. For example, the two PWM inputs can be
used to dim two lamps independently by external PWM signals.
3.11
Cross current protection
The six half brides of the device are cross current protected by an internal delay time. If one
driver (LS or HS) is turned off the activation of the other driver of the same half bridge will be
automatically delayed by the cross current protection time. After the cross current protection
time is expired the slew rate limited switch off phase of the driver will be changed to a fast
turn-off phase and the opposite driver is turned on with slew rate limitation. Due to this
behavior it is always guaranteed that the previously activated driver is totally turned off
before the opposite driver will start to conduct.
3.12
Programmable soft start function to drive loads with higher
inrush current
Loads with start-up currents higher than the over-current limits (e.g. inrush current of lamps,
start current of motors and cold resistance of heaters) can be driven by using the
programmable soft start function (i.e. overcurrent recovery mode). Each driver has a
corresponding over-current recovery bit. If this bit is set, the device will automatically switch-
on the outputs again after a programmable recovery time. The duty cycle in over-current
condition can be programmed by the SPI interface to be about 12% or 25%. The PWM
modulated current will provide sufficient average current to power up the load (e.g. heat up
the bulb) until the load reaches operating condition.
The device itself cannot distinguish between a real overload and a non linear load like a light
bulb. A real overload condition can only be qualified by time. As an example the
microcontroller can switch on light bulbs by setting the over-current Recovery bit for the first
50ms. After clearing the recovery bit the output will be automatically disabled if the overload
condition still exits.
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| L9950 | BRUSH DC MOTOR CONTROLLER, 10 A, PDSO36 |
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| L9953XPTR | BRUSH DC MOTOR CONTROLLER, 10 A, PDSO36 |
| L9953TR | BRUSH DC MOTOR CONTROLLER, 10 A, PDSO36 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L9951 | 功能描述:馬達/運動/點火控制器和驅動器 REAR DOOR ACTUATOR DRIVER 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 |
| L9951_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Rear door actuator driver |
| L-995-12 | 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:NylaKrimp? Funnel Entry Ring Tongue Terminal for 4/0 AWG Wire, Stud #12 |
| L9951TR | 功能描述:馬達/運動/點火控制器和驅動器 REAR DOOR ACTUATOR DRIVER 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 |
| L9951XP | 功能描述:馬達/運動/點火控制器和驅動器 DOOR ACTUATOR DRIVER 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 |
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