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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： | 10/11页 |
| 文件大小： | 474K |
| 代理商： | L497B |
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OTHER APPLICATION NOTES
DUMP PROTECTION
Load dump protection must be implemented by an
external zener if this function is necessary. In fig. 4
DZ2 protects the driver stage, the connection be-
tween pin 6 and 7 protects the output transistor of
pin 6. Moreover DZ1 protects both the power supply
input (pin 3) and Hall-effect sensor.
Resistor R4 is necessary to limit DZ1 current during
load dump.
OVERVOLTAGE LIMITATION
The external darlington collector voltage is sensed
by the voltage divider R2, R3. The voltage limitation
increases rising R2 or decreasing R3.
Due to the active circuit used, an Ro Co series net-
work is mandatory for stability during the high vol-
tage condition.
Ro Co values depend on the darlington used in the
application.
Moreover the resistor R13 is suggested to limit the
overvoltage even when supply voltage is discon-
nected during the high voltage condition.
REVERSE BATTERY PROTECTION
Due to the presence of external impedance at pin 6,
3, 16, 15 L497 is protected against reverse battery
voltage.
NEGATIVE SPIKE PROTECTION
If correct operation is requested also during short
negative spikes, the diode DS and capacitor Cs must
be used.
Figure 4 : Application Circuit.
L497
8/11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| L4981 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:L4981 功率因数校正集成电路 |
| L4981A | 功能描述:功率因数校正 IC Very High Power RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| L4981A | 制造商:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR 4981 DIP20 |
| L4981A_01 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR |
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