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參數資料
| 型號： | L9942XPTR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 2.5 A, PDSO24 |
| 封裝： | LEAD FREE, POWER, SSO-24 |
| 文件頁數： | 20/40頁 |
| 文件大?。?/td> | 664K |
| 代理商： | L9942XPTR |
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L9942
SPI - Control and Status Registers
5.8
Auxiliary logic blocks
5.8.1
Fault Condition
Logical level at pin D0 represents fault condition. It is valid from first high to low edge of
signal CLK up to transfer of data bit D12. Fault bit is an logical OR of:
Control and Status Register 6 bit 5 and 6 for Open Load, bit7 reference current failure
(RERR) and
Control and Status Register 7 bit 0 to bit 7 for Overcurrent, bit 8 and 9 failure at VS
(UV,OV) and
bit 10 and bit 11 during high temperature (TW,TSD)
5.8.2
SPI communication monitoring
At the rising edge of the CSN signal the contents of the shift register will be transferred to
the selected data register. A counter monitors proper SPI communication. It counts rising
edges at pin CLK. The writing to the register is only enabled if exactly 16 bits are transmitted
within one communication frame (i.e. CSN low). If more or less clock pulses are counted
within one frame the complete frame will be ignored. This safety function is implemented to
avoid an activation of the output stages by a wrong communication frame. SPI
communication can be checked by loading a command twice and then answer at pin DO
must be same.
Note:
Due to this safety functionality a daisy chaining of SPI is not possible. Instead, a parallel
operation of the SPI bus by controlling the CSN signal of the connected ICs is
recommended.
5.8.3
PWM monitoring for stall detection
Control registers 4, 5, and 3 contain bits D0-D7, use for setting a stall detection threshold.
The value in this set of bits determine the minimum time for current rise over one quadrant of
motor driving. D7-D0 is compared with the sum of the rise times over one quadrant. When
the sum is less than the value stored in D7-D0 the ST bit (register6 bit 8) is set to a logic “1”.
The PWM pin reflects the PWM control signal of the load current in bridge A. This is so after
power on when the SST bit (register 6, bit11) is reset to a logic “0”. If this bit is set to a
logical “1” then status of the ST bit 8 is mirrored to pin PWM. This provides stall detection
without the need of reading register 6 through the SPI bus.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L9946 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC Motor Controller/Driver |
| L9947 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:QUAD HALF-BRIDGE AND SINGLE HIGH-SIDE DRIVER |
| L9947L | 制造商:STMicroelectronics 功能描述: |
| L9947S | 功能描述:馬達/運動/點火控制器和驅動器 Quad Half Bridge 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 |
| L9949 | 功能描述:功率驅動器IC Door Actuator RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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