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参数资料
| 型号： | L9953LXP |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO36 |
| 封装： | ROHS COMPLAINT, SSOP-36 |
| 文件页数： | 14/35页 |
| 文件大小： | 505K |
| 代理商： | L9953LXP |
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L9953LXP
Application information
Doc ID 16185 Rev 1
3.5
Overvoltage and under voltage detection
If the power supply voltage VS rises above the overvoltage threshold VSOV Off (typical 21 V),
the outputs OUT1 to OUT8 are switched to high impedance state to protect the load. When
the voltage VS drops below the under voltage 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 outputs stages return to the
programmed state (input register 0: bit 20=0).
If the under voltage/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. It is recommended to set bit 20 to avoid a possible high current oscillation in case of
a shorted output to GND and low battery voltage.
3.6
Charge pump
The charge pump runs under all conditions in normal mode. In standby the charge pump is
disabled.
3.7
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. Temperature warning flag and thermal shutdown bit are latched and must
be cleared by the microcontroller. The related bit is only cleared if the temperature
decreases below the trigger temperature. If the thermal shutdown bit has been cleared the
output stages are reactivated.
3.8
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.
3.9
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 = 32 s, 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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L9953LXPTR | 功能描述:马达/运动/点火控制器和驱动器 DOOR ACTUATOR DRVR RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| L9953TR | 功能描述:马达/运动/点火控制器和驱动器 DOOR ACTUATOR DRIVER RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| L9953XP | 功能描述:马达/运动/点火控制器和驱动器 Door actuator DRVR RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| L9953XPTR | 功能描述:马达/运动/点火控制器和驱动器 Door actuator DRVR RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| L9954 | 功能描述:马达/运动/点火控制器和驱动器 Door actuator DRVR RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
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