ST1111N SITI [Silicon Touch Technology Inc.], ST1111N Datasheet - Page 2

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

ST1111N
General Specifications
SP-ST1111N-A.004(2007-07-12)
A.004
The device is designed specifically for electronic commutation of single coil DC
motor applications. They are intended to be used as an interface between
HALL effect latch and a single coil load. Each device includes a power reverse
protected diode, a fan tachometer for dividing the frequency of tachometer pulses
from the driver with 2, a lock detection circuit to shut down the drivers for
overheat prevention, and complementary bi-directional drivers for driving and
sinking large load on a single silicon chip. Though the DC brushless motor
driver can be started as low voltage as 1.5 Volt to 2 Volt and the device permits
operation with supply voltage of 1.5 to 7.5 Volts, the design, specifications and
performance have been optimized for 3V and 5V brushless DC motor
applications.
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 .
If the motor rotation is stalled by external force or obstacles, overdrive current
( or lock current ) may incur coil overheat/burning.
overheat/burning, these devices incorporate lock detection circuit to shut down
the drivers. After the motor locking is released, the drivers can be powered up
using an automatic self-restart circuit. The drivers are shut down roughly 1 to 3
seconds after the motor is locked. After the drivers are shut down, the automatic
self-restart circuit will try to power up the drivers every 1 to 3 seconds
Single Coil Brushless DC Motor Drivers
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
( 1.5 to 7.5 Volts )
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To prevent coil
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ST1111N
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