ST1111N SITI [Silicon Touch Technology Inc.], ST1111N Datasheet - Page 6

• Manufacturer Part Number: ST1111N
• Description: Single Coil Brushless DC Motor Drivers ( 1.5 to 7.5 Volts )
• Manufacturer: SITI [Silicon Touch Technology Inc.]

Application Notes
SP-ST1111N-A.004(2007-07-12)
A.004
There is no requirement of protection diode for power reverse fault in normal
applications. The reverse protection function is built-in.
The FG pin is an open-drained output dividing the frequency sensed by HALL IC
with 2. With suitable output pull up, the fan tachometer output can be used
directly with bipolar or MOS logic for motor speed monitoring/control.
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 increase stability of operation, if required.
The power dissipated by the IC varies widely with the supply voltage, the output
current, and loading. It is important to ensure the application does not exceed
the allowable power dissipation of the IC package. The recommended motor
driver power dissipation versus temperature is depicted as follows:
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
400
350
300
250
200
150
100
50
0
0
Page
25
Power Dissipation-Temperature
Ambient Temperature ( ℃ )
：
50
5
75
100
125
150
Version
ST1111N
：