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ST1111J 数据表(PDF) 6 Page - Silicon Touch Technology Inc.

部件名 ST1111J
功能描述  PWM Input Control Single Coil Brushless DC Motor Drivers ( 1.5 to 7.5 Volts )
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制造商  SITI [Silicon Touch Technology Inc.]
网页  http://www.siti.com.tw
标志 SITI - Silicon Touch Technology Inc.

ST1111J 数据表(HTML) 6 Page - Silicon Touch Technology Inc.

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點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
ST1111J
SP-ST1111J-A.005
Version
:A.005
Page
:5
Application Notes
The capacitor COUT between output nodes is required for high current application.
The capacitor COUT is dependent on coil load and external PWM frequency. The
recommended capacitor COUT is about 0.1μF for external PWM frequency larger
than 20KHz and about 1μF for external PWM frequency less than 2KHz.
The output driver node O1/O2 will be “turned to sink/drive” for V(HIN) = logic
low. Similarly, the output O1/O2 will be “turned to drive/sink” for V(HIN) =
logic high .
The FG pin is an open-drained output and the output frequency is dependent on
the logical voltage of FGS pin. The output frequency is the same with HIN input
signal when V(FGS) is logical low and 1/2 HIN frequency when V(FGS) is
logical high. If there is no need for FG output, let FG output pin open.
The pull-up resistors are built-in at pins HIN, PWM and FGS. For multiple usage
of PCB, connecting 0Ω resistor between the FGS pin and GND will select FG
output function or floating 0Ω resistor will select FG/2 function.
There is no need of external timing capacitor for lock protection and auto-restart
function. For 5V application, the drivers will be shut down roughly 1 to 3 seconds
after the motor is locked. When the drivers have been shut down, the automatic
self-restart circuit will try to power up the drivers every 1 to 3 seconds until lock
is released.
The power polarity reverse protection circuit is built-in. The external protection
diode for power reverse fault is no need.
There is no requirement of the bypass capacitor or Zener Diode between VDD
and GND in normal applications. The connection of this capacitor or Zener Diode
between VDD and GND will reduce noise effect and increase stability of
operation, if required.


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