产品概述
描述
The L9942 is an integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile look-up-table to allow a flexible adaptation of the stepper motor characteristics and intended operating conditions. It is possible to use different current profiles depending on target criteria: audible noise, vibrations, rotation speed or torque. The decay mode used in PWM-current control circuit can be programmed to slow-, fast-, mixed-and auto-decay. In autodecay mode device will use slow decay mode if the current for the next step will increase and the fast decay or mixed decay mode if the current will decrease. The programmable stall detection is useful in case of head lamp leveling and bending light application, by preventing to run the motor too long time in stall for position alignment. If a stall is detected, the alignment process is closed and the noise is minimized.
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所有功能
- Two full bridges for max. 1.3 A load(RDSON= 500 mΩ)
- Programmable current waveform with look-up table: 9 entries with 5 bit resolution
- Current regulation by integrated PWM controller and internal current sensing
- Programmable stepping mode: full, half, mini and microstepping
- Programmable slew rate for EMC and power dissipation optimization
- Programmable Fast-, Slow-, Mixed- and Auto-Decay Mode
- Full-scale current programmable with 3 bit resolution
- Programmable stall detection
- Step clock input for reduced μController requirements
- Very low current consumption in standby mode IS< 3 μA, typ. Tj≤ 85 °C
- All outputs short circuit protected with openload, overload current, temperature warning and thermal shutdown
- The PWM signal of the internal PWM controller is available as digital output.
- All parameters are guaranteed for 3 V < Vcc < 5.3 V and for 7 V < Vs < 20 V
电路原理图
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EDA符号、封装和3D模型
STMicroelectronics - L9942
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符号
封装
3D模型
质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| L9942XP1 | 批量生产 | PowerSSO 24 | 汽车应用 | Ecopack2 | |
| L9942XP1TR | 批量生产 | PowerSSO 24 | 汽车应用 | Ecopack2 |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持。
样片和购买
| 产品型号 | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | 封装 | 包装类型 | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | 温度（ºC） | Operating Temperature (°C) (min) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| L9942XP1TR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | PowerSSO 24 | Tape and Reel | MALAYSIA | EAR99 | NEC | - | - | - | |||
| L9942XP1 | | | distributors 无法联系到经销商，请联系我们的销售办事处 | PowerSSO 24 | Tube | MALAYSIA | EAR99 | NEC | - | - | - | |||
L9942XP1TR 批量生产
L9942XP1 批量生产