參數(shù)資料
型號(hào)： L9951TR
廠商： STMICROELECTRONICS
元件分類： 運(yùn)動(dòng)控制電子
英文描述： BRUSH DC MOTOR CONTROLLER, 10 A, PDSO36
封裝： ROHS COMPLIANT, SOP-36
文件頁數(shù)： 13/36頁
文件大?。?/td> 532K
代理商： L9951TR
Application information
L9951 / L9951XP
Doc ID 14173 Rev 8
3.5
Over-voltage and under-voltage detection
If the power supply voltage VS rises above the over-voltage threshold VSOV OFF (typical
21V), the outputs OUT1 to OUT5 are switched to high impedance state to protect the load
and the internal charge-pump is turned-off. When the voltage VS drops below the
undervoltage threshold VSUV OFF (UV-switch-OFF voltage), the output stages are switched
to the high impedance to avoid the operation of the power devices without sufficient gate
driving voltage (increased power dissipation). If the supply voltage VS recovers to normal
operating voltage the output stages return to the programmed state (input register 0: bit
12=0). If the undervoltage / overvoltage recovery disable bit is set, the automatic turn-on of
the drivers is deactivated. The microcontroller needs to clear the status bits to reactivate the
drivers.
3.6
Temperature warning and thermal shutdown
If junction temperature rises above Tj TW a temperature warning flag is set and is detectable
via the SPI. If junction temperature increases above the second threshold Tj SD, the thermal
shutdown bit will be set and power DMOS transistors of all output stages are switched off to
protect the device. In order to reactivate the output stages the junction temperature must
decrease below TjSD - TjSD HYS and the thermal shutdown bit has to be cleared by the
microcontroller.
3.7
Open-load detection
The open-load detection monitors the load current in each activated output stage. If the load
current is below the open-load detection threshold for at least 1 ms (tdOL) the corresponding
open-load bit is set in the status register. Due to mechanical/electrical inertia of typical loads
a short activation of the outputs (e.g. 3ms) can be used to test the open-load status without
changing the mechanical/electrical state of the loads.
3.8
Over load detection
In case of an over-current condition a flag is set in the status register in the same way as
open-load detection. If the over-current signal is valid for at least tISC=32s, the over-current
flag is set and the corresponding driver is switched off to reduce the power dissipation and
to protect the integrated circuit. If the over-current recovery bit of the output is zero the
microcontroller has to clear the status bits to reactivate the corresponding driver.
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 high side driver. The bits
9, 10 and 11 of the input data register 0 control which of the outputs OUT1 to OUT5 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 monitor current.
相關(guān)PDF資料
PDF描述
L9952GXP 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36
L9952GXPTR 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36
L99H01QF BRUSH DC MOTOR CONTROLLER, PQFP32
L99H01XPTR BRUSH DC MOTOR CONTROLLER, PDSO36
L99PM62XP 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L9951XP 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DOOR ACTUATOR DRIVER 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
L9951XPTR 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DOOR ACTUATOR DRIVER 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
L9952 制造商:STMicroelectronics 功能描述:
L9952GXP 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Power management system IC 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
L9952GXPTR 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Power management system IC 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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