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参数资料
| 型号： | L497B |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDIP16 |
| 封装： | DIP-16 |
| 文件页数： | 9/11页 |
| 文件大小： | 474K |
| 代理商： | L497B |
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Figure 2 : SRC : Icoil Failure and Time Dependence of Active Region.
Figure 3 : Permanent Conduction Protection.
HJ : Input signal
IC : Coil current
VCM : Voltage on capacitor CSRC.
DST : Percentage of imposed desaturation time.
PERMANENT CONDUCTION PROTECTION
(fig. 3)
The permanent conduction protection circuit moni-
tors the input period, charging CP with a costant cur-
rent when the sensor signal is high and discharging
it when the sensor signal is low. If the input remains
high for a time longer than TP the voltage across CP
reaches an internally fixed value forcing the slow de-
crease of coil current to zero. A slow decrease is
necessary to avoid undesired sparks. When the in-
put signal goes low again CP is swiftly discharged
and the current control loop operates normally.
The delay time TP is given by :
TP (sec) = 18 CP R7
Where R7 is the biasing resistor on pin 12 (in K) and
Cp the delay capacitor at pin 9 (in
F).
L497
7/11
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| L497D1 | 功能描述:马达/运动/点火控制器和驱动器 Hall Effect Control 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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